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I-FEED评分系统与结直肠癌患者术后胃肠功能评估的关系
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作者 陈丽婵 连叔薏 +2 位作者 郑娉婷 陈伯赞 陈惜遂 《护理实践与研究》 2024年第11期1636-1642,共7页
目的通过分析结直肠癌患者术后胃肠功能恢复时间、术后住院时间、术后生活质量与I-FEED评分系统的关系,探讨其作为临床评价指标的有效性。方法选取2021年1—9月在汕头市某三级甲等医院胃肠外科参与临床研究的109例结直肠癌手术患者作为... 目的通过分析结直肠癌患者术后胃肠功能恢复时间、术后住院时间、术后生活质量与I-FEED评分系统的关系,探讨其作为临床评价指标的有效性。方法选取2021年1—9月在汕头市某三级甲等医院胃肠外科参与临床研究的109例结直肠癌手术患者作为研究对象。采用病例报告表收集患者一般资料、肠鸣音恢复时间、首次排气时间、首次排便时间、术后住院时间等情况;采用欧洲五维健康量表(EQ-5D-3L)评估患者术后生存质量。按照I-FEED评分将患者分为术后胃肠功能恢复正常组55例、术后胃肠不耐受(POGI)组37例、术后胃肠功能障碍(POGD)组17例,采用单因素方差分析、卡方检验及非参数秩和检验分析3组间术后胃肠功能恢复时间、术后生活质量与I-FEED等级的关系。结果3组患者术后肠鸣音恢复时间、首次排气时间与术后住院时间比较差异有统计学意义(P<0.05),并且均以正常组患者的时间最短,其次是POGI组,而POGD组患者时间最长。3组患者术后1周生存质量5个维度均有所改善,并且正常组患者改善程度>POGI组>POGD组,其中行动能力、自理能力、疼痛或不适和焦虑或抑郁4个维度组间比较差异有统计学意义(P<0.05);而日常生活能力比较差异无统计学意义(P>0.05)。结论I-FEED评分系统作为结直肠癌术后患者胃肠功能状态的评价指标具有分层的敏感性和临床适用性。 展开更多
关键词 I-feed评分 结直肠癌 术后胃肠功能障碍 胃肠功能 评价指标
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The Effects of Different Feeding Practices on the Nutritional Status of Infants below 12 Months Old in the Kumba 1 Sub-Division
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作者 Gillian Nkeudem Asoba Fidelis Sameh Ebong +3 位作者 Samuel Metuge Etchu Kaptai Tabe Teh Rene Ning Sumbele Irene Ngole 《Food and Nutrition Sciences》 CAS 2024年第5期336-350,共15页
Appropriate feeding practices are important during infancy for good health, growth and development of infants and children. WHO revised its earlier recommendation of Exclusive Breastfeeding (EBF) of infants from 4 to ... Appropriate feeding practices are important during infancy for good health, growth and development of infants and children. WHO revised its earlier recommendation of Exclusive Breastfeeding (EBF) of infants from 4 to 6 months of age to EBF until about 6 months of age, with the addition of complementary foods thereafter. This recommendation confirms that breast milk alone is sufficient to meet infants’ nutritional requirements for the first 6 months of life. The main objective of this study was to investigate the effect of various feeding practices on the Nutritional status of infants 0 - 12-month-old in the Kumba 1 Sub-Division. A descriptive cross-sectional study was conducted from December 2019 to August 2020. A total of 341 nursing mothers and their infants 0 - 12 months of age were recruited. Socio-demographic factors and the different feeding habits of the children were assessed using a semi-structured questionnaire. Nutritional status was assessed using anthropometric measurements. The overall proportion of infants who exclusively breastfed for 6 months was 69.2% and those who were mix-fed were 30.8% in the study area. The overall prevalence of malnutrition in the population was 61.0%. Among the malnourished children, 53.1% were underweight, 19.6% were wasted and 10.0% were stunted. Though not significant, the prevalence of wasting (21.0%) and underweight (58.3%) was higher among Mix-Fed (MF) children when compared to their EBF counterparts. Feeding practices affected the nutritional status of the infants. Underweight and wasting were observed among infants on Complementary Feeding (CF), although some exclusively breast-fed infants were stunted. Hence, nursing mothers should try as much as possible to practice EBF as recommended by WHO and can practice CF when the child is above six months. 展开更多
关键词 Exclusive Breastfeeding Complementary feeding feeding Practices INFANTS MALNUTRITION Nutritional Status UNDERWEIGHT Wasted STUNTING
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Productivity of Commercial Feedlot Beef Production Significantly Improved by Asparagopsis Bioactives Stabilized in Canola Oil
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作者 Robert D. Kinley Breanna M. Roque +6 位作者 Sigrid L. Mackenzie Marina R. S. Fortes Chiara Palmieri Garth Tarr Holly Cuthbertson Rodney Polkinghorne Frances C. Cowley 《American Journal of Plant Sciences》 CAS 2024年第10期899-929,共31页
Research using open-circuit respiration chambers has established that Asparagopsis bioactive compounds stabilized in canola oil (Asp-Oil), delivering a range of inclusion between 34 - 51 mg bromoform (CHBr3)/kg dry ma... Research using open-circuit respiration chambers has established that Asparagopsis bioactive compounds stabilized in canola oil (Asp-Oil), delivering a range of inclusion between 34 - 51 mg bromoform (CHBr3)/kg dry matter intake (DMI), inhibits methane (CH4) emissions > 98% in feedlot cattle. In this study, Asp-Oil was fed at 35 mg CHBr3/kg DMI in the feedlot finisher diet under highly replicated and commercially relevant conditions, and adequately powered to confirm differences as low as 3.3% in feed conversion efficiency (FCE). The study also evaluated the effect of Asp-Oil on CH4 production (g/day), carcass and meat-eating qualities, animal health, and food safety. The experiment consisted of 300 Angus-Shorthorn (Bos taurus) steers in 30 pens of 10 and fed a barley-based ration supplemented with canola oil (Control, n = 15), or Asp-Oil (n = 15) for total 81-d, inclusive of 21-d transition to full Asp-Oil and grain inclusion in the finisher ration. Reduction of CH4 was measured using GreenFeed Emissions Monitors (GEM) in a subset of 2 pens in both Control and Asp-Oil. However, 67% of CH4 measurements were recorded below the GEM’s limit of detection. An inhibition range of 58% - 98% was demonstrated by collectively using GEM and preliminary respiration chamber measurements. Asp-Oil improved FCE 7.4% in the finisher diet, and 5.6% across transition and finisher periods. During the transition steps the steers had not yet received their full allocations of grain and Asp-Oil which is responsible for the lower FCE benefits. A 4.1% lower DMI in the finisher period contributed to benefits in FCE with no effect on daily weight gains. Cost of feed and weight gain were reduced $0.35/head/day and $0.23/kg, respectively, in steers receiving Asp-Oil. Residues of Asparagopsis CHBr3 were not detected in any sample and only trace iodide and bromide were detected in livers and kidneys of both Control and Asp-Oil steers at levels safe for human consumption. Steers demonstrated normal rumen development typical of feedlot diets. This study confirms that Asp-Oil safely induces significant productivity benefits and CH4 reductions in feedlot beef production. Commercial adoption of Asparagopsis can benefit feedlot beef production and reduces the climate change contribution of livestock production. 展开更多
关键词 Asparagopsis BROMOFORM Enteric Methane feed Efficiency RUMINANT SEAWEED
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Dehydrated Natural Feed for Cats: Influence on Apparent Digestibility Coefficient, Feces Scores, and Serum Immune, Antioxidant, and Metabolic Biomarkers
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作者 Bruno Giorgio de Oliveira Cécere Guilherme Luiz Deolindo +8 位作者 Bianca F. Bissacotti Priscila Marquezin Copetti Maria Rosa Chitolina Schetinger Bruna Klein Matheus Delamea Baldissera Thiago Pereira Ribeiro Walter Hugo Cuelho Suarez Daniel Pigatto Monteiro Aleksandro Schafer Da Silva 《Food and Nutrition Sciences》 CAS 2024年第7期594-611,共18页
The present study aimed to determine whether natural dehydrated feed (DNF) can replace dry extruded feed while preserving the required daily intake, nutrient digestibility and benefits for immunity and antioxidant res... The present study aimed to determine whether natural dehydrated feed (DNF) can replace dry extruded feed while preserving the required daily intake, nutrient digestibility and benefits for immunity and antioxidant response in cats. The animals were divided into two groups of seven animals each. One group received DNF, and the other consumed commercial extruded dry feed (DCF). The experiment lasted 45 days and we measured daily consumption and collected blood and feces samples. The animals in the DNF group showed greater digestibility of fiber and mineral matter than DCF. Cats in the DNF group had a higher volume of feces. DNF cats had lower leukocyte and granulocyte counts and cholesterol levels. Serum enzymatic antioxidant responses and non-enzymatic were higher in DNF cats. Cats in the DNF group showed lower serum acute phase proteins in addition to a tendency toward a higher concentration of transferrin than in the DCF group. Fecal Escherichia coli and total coliform counts of cats fed DNF were higher than DCF. We conclude that the daily consumption of cats is adequate. This feed had greater digestibility of fiber and mineral matter, in addition to an improvement in antioxidant and immunological responses. 展开更多
关键词 Alternative feed ANTIOXIDANT Companion Animals Health
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Heart Failure-Like Reaction Is Likely Involved in the Feeding Behaviour of Blood-Sucking Leeches
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作者 Li Yang Jiao Shu +4 位作者 Xiao Wang Wei Yu Debin Wang Zichao Liu Bin Wang 《Advances in Bioscience and Biotechnology》 CAS 2024年第1期52-69,共18页
Medicinal leeches have been utilized in therapy for thousands of years. However, the adaptation physiology between leeches and hosts is not fully understand. To disclose the molecular mechanisms of adaptation between ... Medicinal leeches have been utilized in therapy for thousands of years. However, the adaptation physiology between leeches and hosts is not fully understand. To disclose the molecular mechanisms of adaptation between leech and host, the body transcriptomes of hunger and fed blood-sucking Poecilobdella javanica, Haemadipsa cavatuses, and Hirudo nipponia leeches were obtained by RNA sequencing, after comparison, a stratified unigenes group was obtained, which closely correlated to body distension. In the group, Rfamide receptor decreased significantly (P < 0.05) while serotonin receptor increased significantly (P < 0.05). Moreover, four KEGG (Kyoto Encyclopedia of Genes and Genomes) pathways, including cardiac muscle contraction, complement and coagulation cascades, renin-angiotensin system, and hypertrophic cardiomyopathy were significantly enriched. The unigenes annotation, neuroregulators correlation analysis and induced function of the KEGG pathways, were consistently supported the same result as: vasoconstriction and systole reaction enhance in hunger leeches and vice versa vasodilation and diastole increase in fed leeches, meanwhile, Interspecific comparison and correlative analyses of physiological function showed that the strongest reaction of induced heart failure from four KEGG occur in strongest reaction of systole in hungry P. javanica and in strongest reaction of diastole in fed H. nipponia. Overall, heart failure is likely a physiological function involved in feeding behaviour. 展开更多
关键词 Blood-Sucking Leeches Transcriptomic Analysis Heart Failure feeding Behaviour
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The Development of a Feeding Coparenting Scale for Japanese Parents of Fifth- and Sixth-Grade Elementary School Children
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作者 Maiko Yasuzato Tae Kawahara +2 位作者 Yuichi Nakayama Cin Cin Tan Akemi Yamazaki 《Open Journal of Nursing》 2024年第1期27-39,共13页
Aim: Recently, the role of feeding coparenting has gained attention in the child eating research field. The Feeding Coparenting Scale (FCS), a measure of how caregivers interact with their partners when feeding their ... Aim: Recently, the role of feeding coparenting has gained attention in the child eating research field. The Feeding Coparenting Scale (FCS), a measure of how caregivers interact with their partners when feeding their children was developed in the United States in 2019. However, there is no valid and reliable measure to assess feeding coparenting among caregivers of school-aged children in Japan. Therefore, this study aimed to develop a Japanese version of the FCS (FCS-J) questionnaire for caregivers with school-aged children. Methods: This was a web-based cross-sectional survey completed by caregivers of children aged 10-12 years. A preliminary survey using interviews and a web-based survey was conducted and found that the translated items of the FCS into Japanese were understandable to Japanese people. The developed survey was administered to parents of children at an elementary school. The reliability of the survey was assessed using both test-retest reliability and internal consistency analysis. Exploratory factor analysis was used to test construct validity, and known population validity was examined in relation to attributes, marital satisfaction, and feeding tasks. Results: Findings with 135 parents of school-aged children showed good internal reliability and validity of the FCS-J. The mean score for the overall FCS-J score was 46.2 (SD = 6.2), with Cronbach’s α of 0.72. For the subscales, Cronbach’s α ranged from 0.75 to 0.79. In sum, the present study’s results support the three-factor structure of the FCS in Japanese caregivers in Japan. Conclusions: The developed FCS-J was found to have a certain degree of reliability and validity. In this study, a Japanese version of the FCS-J was developed. . 展开更多
关键词 CHILD Coparenting PARENTS feeding Coparenting
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31 Plant Species against Blood Feeding and Disease Vectors Insects: Beyond Anti-Insect Properties, Unvalued Opportunities and Challenges for Health and Sustainability
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作者 Prudence Bararunyeretse Jean Claude Niyokwizera +1 位作者 Esperance Gateretse Mathias Hitimana 《Pharmacology & Pharmacy》 2024年第5期167-206,共40页
Plants with bioactive properties are greatly useful in preventing and controlling blood-sucking and disease-vector invertebrates, particularly in developing countries and low-income communities. Their application is a... Plants with bioactive properties are greatly useful in preventing and controlling blood-sucking and disease-vector invertebrates, particularly in developing countries and low-income communities. Their application is a promising alternative to synthetic compounds whose use remains a health, environmental, and economic challenge. However, many are still unknown and unvalued, while others are becoming ignored and threatened. The main objective of this ethnobotanical study is to identify and characterize indigenous and locally grown plants against blood-sucking and disease-vector insects. Salient opportunities and challenges of using these plants are documented and discussed. Semi-structured interviews, using a prepared questionnaire, were conducted with 228 informants. The consensus index (CI) was calculated to analyze the reliability of the collected information. The identified 31 anti-insect plant species belong to 20 botanical families, four morphological categories, and six habitat types. They can be categorized as insecticidal plants (42% of the total), insect repellent (42% of the total), and both insecticidal and insect repellent (16% of the total). More than 54% of these are still abundant in the study area, while about 35.5% have become rare and difficultly accessible. Based on the numerical importance of related anti-insect plant species, the seven targeted blood-sucking insects range in the following decreasing order: Jiggers (16 species) > Fire Ants (9 species) > Flies (8 plants) > Mosquitoes (4 species) > Fleas (2 species) > Bedbugs (1 species) > lice (0 species). The three most commonly used plants, with the highest confirmation indices, are Tetradenia riparia (ICs = 0.712), Eucalyptus globulus subsp. maidenii (ICs = 0.302), and Solanum aculeastrum (ICs = 0.288). The antimicrobial role of many locally grown anti-insect plants and the multiple other associated valorization possibilities are ignored by most informants. Domesticating, propagating, protecting, and promoting the sustainable use of these plants would be an appropriate route for their conservation and continued availability. 展开更多
关键词 Blood-feeding Insects Anti-Insect Plants BIOPESTICIDES SUSTAINABILITY Burundi
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Feeding Practices and Use of Lysine and Methionine in Pigrationing on Intensified Pig Breeding in the West Center and Hauts Bassins Regions of Burkina Faso
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作者 Isidor Zangbéwindin Ouedraogo Timbilfou Kiendrebeogo +1 位作者 Aboubacar Toguyeni Chantal Yvette Kabore-Zoungrana 《Open Journal of Animal Sciences》 2024年第1期23-38,共16页
The aim of the study was to assess feeding practices and the use of lysine and methionine in pig rationing on intensified and semi-intensive pig breeding in the Koudougou and Bobo-Dioulasso areas. To this end, a cross... The aim of the study was to assess feeding practices and the use of lysine and methionine in pig rationing on intensified and semi-intensive pig breeding in the Koudougou and Bobo-Dioulasso areas. To this end, a cross-sectional survey was carried out on 87 breeding in these towns. A Discriminant Factorial Analysis (DFA) confirming a k-means classification of the data collected was used to retain 71 breeding divided into three breeding classes: Class A (32.4% of breeding), Class B (14.08%) and Class C (53.52%). The results show that the majority of pig breeders were men between the ages of 36 and 59. Average herd sizes were 35 ± 28;79 ± 42 and 89 ± 21 pigs for Classes A, B and C respectively. The main breeds of pig found on the breeding were crossbred, Large white, local, Landrace and Duroc. Class A (26.1%), B (30%) and C (15.8%) breeders were familiar with both lysine and methionine. Class A breeders distributed feed staggered (65.2%) and in rations (34.8%). Lysine (13%) and methionine (8.7%) were purchased at 5250 FCFA/kg. Those in class B distributed feed staggered (50%) and in the form of rations (50%), in which they incorporated lysine (30%) and methionine (30%) purchased at a cost of 2500 FCFA/kg and 3000 FCFA/kg respectively. Rationing and staggered feeding were practiced by 23.7% and 76.3% of Class C breeders respectively. Only lysine purchased at 3400 FCFA/kg was incorporated into rations by 10.5% of breeders. The high cost of lysine and methionine was incriminated by Class A (100%), B (33.3%) and C (50%) breeders. In conclusion, intensive pig breeding, the practice of rationing and the incorporation of the amino acids lysine and methionine are of ascending importance from classes C, A to B. The high cost of feedstuffs, particularly lysine and methionine, compromises their use in rations, which could have a negative impact on expected breeding performance. The screening and use of feeds rich in and/or enriched with these amino acids, through the development or adaptation of technologies, could improve the efficiency of rations and the productivity of intensive pig breeding in Burkina Faso. 展开更多
关键词 feeding Practices LYSINE METHIONINE Intensive Pig Breeding Burkina Faso
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Fruit Powder of Tetrapleura tetraptera in Local Feed on Some Zootechnical Performances of Juveniles of Clarias gariepinus in Concrete Tank
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作者 Ngouana Tadjong Ruben Abdoulaye Abdoulaye +1 位作者 Kana Jean Raphaël Téguia Alexis 《Open Journal of Animal Sciences》 2024年第2期56-69,共14页
This study focused on the supplementation of four-sided spice fruit powder (Tetrapleura tetraptera) on some zootechnical performances of juveniles of Clarias gariepinus and was carried out from February 14 to July 20 ... This study focused on the supplementation of four-sided spice fruit powder (Tetrapleura tetraptera) on some zootechnical performances of juveniles of Clarias gariepinus and was carried out from February 14 to July 20 at the Massoma Fish Farm of Bojongo Mbeidi located in the Littoral Region, Department of Wouri, Douala IV district. The farm benefits from a climate favorable to aquaculture activity. For this purpose, five (5) treatments were tested including T<sub>0+</sub> (imported feed), T<sub>0-</sub>, T<sub>0.3</sub>, T<sub>0.4</sub>, and T<sub>0.5</sub> respectively for the treatments with 0% supplemented food;0.3%;0.4% and 0.5% of Tetrapleura tetraptera powder. A total of 450 Clarias gariepinus fry with an initial average weight of 7 ± 1.5 g, were distributed in happas of 0.49 m<sup>2</sup> each placed in Triplicate in a completely randomized device. Four isoprotein foods with 38% crude protein were formulated to feed these fry at 7% of their biomass per day for 15 days then to their fullness until the end of the experiment. Intermediate fishing was carried out every fortnight. 75 days later, the results recorded show that the highest average survival rate (96.44% ± 3.5%) was recorded with the subjects fed feed supplemented with 0.4% T. tetraptera powder. The average weight (120.93 ± 67.20), weight gain (113.93 ± 67.20), specific growth rate (3.64 ± 0.79% g/d) and total lengths and standard (26.43 ± 1.9 and 23.66 ± 1.76) the highest were recorded with the T<sub>0+</sub> treatment (imported feed). The highest conditioning factor K (2.14 ± 0.15) was recorded with the treatment supplemented with 0.4% T. tetraptera. The lowest conversion ratio (1.28) was recorded with the treatment fed with imported blue crown food (T<sub>0+</sub>). Furthermore, the lowest production cost was recorded with the treatment supplemented with 0.4% T. tetraptera. It appears from this study that the juveniles of C. gariepinus better value the feed substituted with 0.4% of the powder of four sides (Tetrapleura tetraptera). 展开更多
关键词 Tetrapleura tetraptera Local feed Zootechnical Performance Juvenile of Clarias gariepinus
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Technical-Economic Performance, Carcass and Meat Quality of COBB500 Broilers Fed Rations Incorporating Mango By-Product Feeds in Ivory Coast (West Africa)
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作者 Timbilfou Kiendrébéogo Alidjata Traoré +4 位作者 Etienne Sodre Drissa Barry Isidor Ouedraogo Marcelle Grace Koidja Vianney Tarpaga 《Open Journal of Animal Sciences》 2024年第1期1-13,共13页
The study evaluated the growth performance and carcass quality of COBB500 broilers fed two experimental rations incorporating feed and mango fine ED<sub>10</sub> for a batch of 83 birds, ED<sub>20<... The study evaluated the growth performance and carcass quality of COBB500 broilers fed two experimental rations incorporating feed and mango fine ED<sub>10</sub> for a batch of 83 birds, ED<sub>20</sub> (batch of 83 birds) in comparison with a commercial control ration CCD (84 birds). For this purpose, 250 day-old chicks of this breed were purchased in Korhogo and transported to Tengréla in Ivory Coast for rearing. The results show that substituting mango provender ans and mango seed flour for maize resulted in rations with costs per kgMS of 215.35FCFA, 2016.93FCFA and 320FCFA for the ED<sub>10</sub>, ED<sub>20</sub> and CCD rations respectively. The production costs per kg of chicken (FCPkgLW) of the CCD ration were significantly higher than those of the ED10 and ED<sub>20</sub> (p 0.05). ADGs were significantly different and decreasing from CCD, ED<sub>20</sub> to ED<sub>10</sub> (p 0.05). Average weights at 42nd day for ED<sub>20</sub> and CCD were homogeneous (p > 0.05) and significantly higher than for ED<sub>10</sub> (p 0.05). By day 49th the average weight of ED<sub>20</sub> had reached and exceeded that of CCD by day 42nd. PSLW, HCW and CCW were significantly different and decreasing from CCW, ED<sub>20</sub> to ED<sub>10</sub> (p 0.05). Average hot (HCY) and cooled (CCY) carcass yields of ED<sub>20</sub> and CCD rations were comparable (p > 0.05) and significantly higher than those of ED<sub>10</sub> ration (p = 0.009) and 0.003). Average drumstick and neck weights were significantly higher and lower for CCD, ED<sub>20</sub> and ED<sub>10</sub> (p 0.05). For all other parts of the cut, the average weights of the CCD ration were significantly higher (p 0.05) than those of the ED<sub>20</sub> and ED<sub>10</sub> rations, which were homogeneous (p 0.05). The incorporation of mango provender and mango seed flour in broiler rations offers the prospect of reduced production costs, less competition between man and animals over cereals, and lean meat production that is more appreciated than that of chickens fed conventional feed. As it stands, the ED<sub>20</sub> ration can be recommended as a growth diet for broilers. It would be necessary to determine the levels of anti-nutritional substances in mango feeds and to assess the in vivo digestibility of mango ingredients and the diets incorporating them. 展开更多
关键词 BROILER COOB 500 Chickens Mango feed Carcass Characteristics Tengrela Ivory Coast
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Assessment of BRRI Whole Feed Combine Harvester (Model BRRI WCH2021) for Mechanized Rice Harvesting in Bangladesh
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作者 Arafat Ullah Khan Akm Saiful Islam +5 位作者 Md. Kamruzzaman Pintu Subrata Paul Md. Durrul Huda Md. Anwar Hossen Md. Monirul Islam Md. Moudud Ahmmed 《Agricultural Sciences》 2024年第2期274-291,共18页
Agricultural mechanization plays a pivotal role in the transition from subsistence to commercial agriculture, with a particular focus on labour-intensive activities like harvesting. This study assesses the operational... Agricultural mechanization plays a pivotal role in the transition from subsistence to commercial agriculture, with a particular focus on labour-intensive activities like harvesting. This study assesses the operational characteristics of the BRRI Whole Feed Combine Harvester (Model BRRI WCH2021) at the field level. Developed under the SFMRA project, the harvester’s technical performance and loss assessment were conducted during the Boro 2022 and Aman 2022 seasons in farmer fields in Bangladesh’s Rangpur region. The field efficiency of the harvester was determined to be 62.5% and 57.9% in the Boro and Aman seasons, respectively. Fuel consumption rates were recorded at 2.77 l/ha and 2.31 l/ha for the Boro and Aman seasons. The total harvesting losses, encompassing cutter bar, shatter, cylinder, and separation loss, averaged 0.56% and 0.48% in the Boro and Aman seasons, respectively. Mechanized harvesting with the BRRI Whole Feed Combine Harvester significantly reduced paddy losses by 5.81% compared to manual methods. The field evaluation results indicate the combine harvester’s satisfactory performance, highlighting its potential to alleviate labour demands during peak harvesting. The development of the BRRI WCH offers a sustainable solution for rice harvesting mechanization among progressive farmers. It paves the way for the broader adoption of advanced agricultural technology in Bangladesh. 展开更多
关键词 BRRI Whole feed Combine Harvester Field Efficiency Fuel Consumption Harvesting Loss
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精准饲喂对个体奶牛甲烷排量的影响
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作者 叶岩 崔振兴 +4 位作者 李源源 杨存志 侯云涛 李尧 孙先明 《农机化研究》 北大核心 2025年第3期156-161,共6页
反刍动物奶牛的甲烷排放是农业温室气体主要排放源之一,而采食量是影响个体奶牛甲烷排量的重要因素,故研制个体奶牛精准饲喂系统和利用甲烷检测装置分析奶牛采食量对甲烷排量的影响,对提高奶牛健康水平、提高饲料利用率和奶牛科学饲养... 反刍动物奶牛的甲烷排放是农业温室气体主要排放源之一,而采食量是影响个体奶牛甲烷排量的重要因素,故研制个体奶牛精准饲喂系统和利用甲烷检测装置分析奶牛采食量对甲烷排量的影响,对提高奶牛健康水平、提高饲料利用率和奶牛科学饲养管理能力等方面均具有重要意义。为此,设计了个体奶牛精准饲喂系统和甲烷检测装置,利用个体奶牛穿戴式“牛衣”和牧场内主体框架分布网点固定安装相结合的方法,采集对照组和试验组各3头奶牛采食前后奶牛后肠道甲烷排量和奶牛嗳气与呼吸的甲烷排量。研究表明,个体奶牛精准饲喂系统可依据奶牛个体差异实现饲料的定量饲喂,相同条件下精准饲喂和自由采食的个体奶牛甲烷排量和产奶量有差异但不显著,且随着个体奶牛采食量增加,甲烷排量会随之升高,说明饲喂量与甲烷排量之间存在正相关关系。 展开更多
关键词 精准饲喂 甲烷排量 奶牛
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基于被动水声信号的加州鲈摄食强度识别
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作者 李路 周玉凡 +4 位作者 孙超奇 周铖钰 朱明 谭鹤群 万鹏 《西南大学学报(自然科学版)》 CAS 北大核心 2025年第2期1-16,共16页
为解决高密度养殖加州鲈摄食强度识别难的问题,实现加州鲈的精准投喂,提出了一种基于被动水声信号的加州鲈鱼群摄食强度识别方法。该方法以高密度养殖条件下的加州鲈为研究对象,采用摄食声信号采集装置获取加州鲈鱼群的摄食声信号,经预... 为解决高密度养殖加州鲈摄食强度识别难的问题,实现加州鲈的精准投喂,提出了一种基于被动水声信号的加州鲈鱼群摄食强度识别方法。该方法以高密度养殖条件下的加州鲈为研究对象,采用摄食声信号采集装置获取加州鲈鱼群的摄食声信号,经预处理后提取摄食声信号的多种特征,通过随机森林、皮尔逊(Pearson)相关性分析及主成分分析筛选出较为重要的特征,基于粒子群算法(particle swarm optimization,PSO)和多层感知机(multi-layer perceptron,MLP)建立PSO-MLP鱼群摄食强度识别模型。结果表明:基于PCA特征选择的PSO-MLP识别模型的分类识别效果更好,其准确率达到97.88%,识别时长为6.24 s,与基于随机森林和基于皮尔逊相关性分析的模型相比,识别准确率分别提高2.61%和1.02%,识别时长缩短1.04 s和1.09 s。说明基于被动水声信号的加州鲈鱼群摄食强度识别方法有效提高了鱼群摄食强度识别的准确率和效率,可为智能投喂系统的开发提供技术支持。 展开更多
关键词 水产养殖 鱼类摄食强度 被动水声信号 加州鲈 特征提取
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非常规饲料的开发与高效利用
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作者 印遇龙 杨哲 《饲料工业》 北大核心 2025年第1期2-10,共9页
我国饲料原料供给链尚存结构性矛盾和人畜争粮等诸多弊端,着力开发和高效利用非常规饲料将成为当代养殖业健康可持续发展的研发重点。非常规饲料具有资源广、单一营养和生物活性成分高、饲料成本低等优势。同时,非常规饲料营养成分不平... 我国饲料原料供给链尚存结构性矛盾和人畜争粮等诸多弊端,着力开发和高效利用非常规饲料将成为当代养殖业健康可持续发展的研发重点。非常规饲料具有资源广、单一营养和生物活性成分高、饲料成本低等优势。同时,非常规饲料营养成分不平衡、用量限制、抗营养因子、适口性差和质量不稳定等限制因素也需要对应的技术手段攻克。文章综述了杂粕类、糟渣类、木本饲料、单细胞蛋白、动物源蛋白、谷物副产物、秸秆、中草药副产物和茶叶副产物等非常规功能型饲料的资源分布、营养特征、加工方式和应用实例。最后,探讨了建立非常规饲料资源利用与产业化的战略体系,展望了今后非常规饲料原料加工的创新技术,为加速解决我国粮油危机和多元化问题提供了新的角度。 展开更多
关键词 非常规饲料 非常规蛋白饲料 非常规能量饲料 饲料原料 副产物 动物营养
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超级微波消解ICP-OES法测定宠物饲料中硫含量及与总蛋白质相关性分析
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作者 陈树娣 李锦才 +3 位作者 陈晓燕 李胜 张世伟 郑彦婕 《光谱学与光谱分析》 北大核心 2025年第2期420-425,共6页
建立了超级微波消解-电感耦合等离子体发射光谱法(ICP-OES)测定宠物饲料中硫含量的新方法。系统探究了超级微波消解条件对消解液中残留碳含量(RCC)和残留酸量(RA)的影响,以这两项指标为依据,有效评估了消解效果,建立了优化微波消解条件... 建立了超级微波消解-电感耦合等离子体发射光谱法(ICP-OES)测定宠物饲料中硫含量的新方法。系统探究了超级微波消解条件对消解液中残留碳含量(RCC)和残留酸量(RA)的影响,以这两项指标为依据,有效评估了消解效果,建立了优化微波消解条件的新策略。系统性研究了五种不同价态的硫形态对硫元素测定的影响,发现低价态硫标准物质在酸性条件下制备时,硫元素发射强度显著增强,而高价态硫标准物质在三种条件(酸性、中性和碱性)下制备时,硫元素发射强度均较稳定,为配制介质和硫标准物质的选择提供了有益的指导。研究发现,超级微波消解系统所创造的高温高压环境以及消解试剂的强氧化性条件,能有效消除低价态硫在酸性前处理条件下的发射强度增强效应。采用酸性条件配制高价态硫(SO_(4)^(2-))标准物质,并结合超级微波消解系统,能够实现宠物饲料中五种不同价态硫的准确测定。加标回收率为86.5%~108%,RSD值为1.69%~4.18%,检出限为6.2 mg·kg^(-1),与国家标准方法相比,该方法具有灵敏度高、成本低、绿色环保、工作效率高的优点。研究发现宠物饲料中硫含量与总蛋白质含量之间存在极显著正相关性(相关系数=0.819,p<0.01),可以为宠物饲料中总蛋白质含量的准确测定提供新思路和方向。 展开更多
关键词 超级微波消解 超级微波消解-电感耦合等离子体发射光谱(ICP-OES) 宠物饲料 总蛋白质 相关性
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牛至精油生物学功能及在动物生产中的应用
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作者 韩战强 张红超 +2 位作者 孟燕飞 马亚姣 张丁华 《饲料工业》 北大核心 2025年第2期22-26,共5页
牛至精油因富含酚类和萜烯类多种化合物,具有抗炎、抗菌、抗氧化及抗病毒等多种生物学功能。牛至精油作为饲料添加剂应用在猪鸡生产中可以提高其生产性能,增强机体抗氧化能力及免疫功能的同时,还可以提高鸡的屠宰性能及肉品质;应用在牛... 牛至精油因富含酚类和萜烯类多种化合物,具有抗炎、抗菌、抗氧化及抗病毒等多种生物学功能。牛至精油作为饲料添加剂应用在猪鸡生产中可以提高其生产性能,增强机体抗氧化能力及免疫功能的同时,还可以提高鸡的屠宰性能及肉品质;应用在牛羊生产中可以促进瘤胃的发育,增强瘤胃消化功能,提高生长、生产性能、屠宰性能、改善肉品质,增强机体免疫力和抗氧化能力;应用在水产动物及肉兔生产中可以提高其生长性能、肉用品质、抗氧化能力及机体免疫力。文章就牛至精油生物学功能、机理及在动物生产中的应用进行了综述,同时对牛至精油在动物生产应用中存在的问题进行了探讨,旨在持续提高牛至精油的功能和价值,为牛至精油在动物生产中推广应用提供重要支撑。 展开更多
关键词 牛至精油 功能 动物生产 应用 饲料添加剂
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柴胡甾醇的提取纯化研究
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作者 刘丽萍 张雪婷 +1 位作者 王凤琴 刘灵霞 《饲料工业》 北大核心 2025年第2期123-128,共6页
为优化柴胡甾醇的提取纯化工艺,以柴胡为研究材料,甾醇提取率为考察指标,采用超声波协同酶法提取柴胡甾醇,通过单因素和正交试验优化柴胡甾醇提取工艺,并采用大孔树脂AB-8探索柴胡甾醇的纯化条件。结果表明,柴胡甾醇提取的最佳工艺条件... 为优化柴胡甾醇的提取纯化工艺,以柴胡为研究材料,甾醇提取率为考察指标,采用超声波协同酶法提取柴胡甾醇,通过单因素和正交试验优化柴胡甾醇提取工艺,并采用大孔树脂AB-8探索柴胡甾醇的纯化条件。结果表明,柴胡甾醇提取的最佳工艺条件为乙醇浓度60%、提取时间60 min、酶浓度1%,在此条件下柴胡甾醇的提取率为2.84%。大孔树脂纯化甾醇的最佳条件是吸附剂用量为2 g,进样浓度为0.2 mg/mL,进样体积为4 mL,在此条件下柴胡甾醇的吸附率为72.27%,解吸率为80.02%,甾醇含量提高到了31.20%。此提取纯化工艺稳定可行,可为柴胡甾醇饲料添加剂的开发利用提供依据。 展开更多
关键词 柴胡甾醇 提取工艺 大孔吸附树脂 饲料添加剂 超声波协同酶法
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果寡糖的作用机理及其在水产饲料中的应用
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作者 张春暖 袁小玉 +3 位作者 王路 蒋冬雪 王军辉 杜鹃 《水产科学》 北大核心 2025年第1期162-170,共9页
果寡糖又称低聚果糖或蔗果三糖,是蔗糖分子以β-1,2糖苷键结合1~3个D果糖所形成的寡糖的总称,它广泛存在于天然食物中,如香蕉、小麦、大麦、洋葱、黑麦、莴苣、菊芋等[1]。果寡糖的制备主要采用酶水解的方法,果寡糖具有耐高温、抑制淀... 果寡糖又称低聚果糖或蔗果三糖,是蔗糖分子以β-1,2糖苷键结合1~3个D果糖所形成的寡糖的总称,它广泛存在于天然食物中,如香蕉、小麦、大麦、洋葱、黑麦、莴苣、菊芋等[1]。果寡糖的制备主要采用酶水解的方法,果寡糖具有耐高温、抑制淀粉老化、热值低、安全、稳定、无毒、高黏度、不被胃肠道消化等理化特性[2]。 展开更多
关键词 果寡糖 生理功能 饲料
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水产饲料的低碳与减排
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作者 冷向军 朱瑞俊 《饲料工业》 北大核心 2025年第2期1-7,共7页
低碳和减排是全社会的共同任务。水产养殖在为人类提供了食物来源的同时,也产生一定数量的碳排放和水体污染,其核心在于水产饲料的低排放。文章综述了水产饲料低碳与减排的内容与措施,包括加工、原料选用、酶制剂、有机酸和发酵技术等,... 低碳和减排是全社会的共同任务。水产养殖在为人类提供了食物来源的同时,也产生一定数量的碳排放和水体污染,其核心在于水产饲料的低排放。文章综述了水产饲料低碳与减排的内容与措施,包括加工、原料选用、酶制剂、有机酸和发酵技术等,以期为低排放(低碳、低氮、低磷排放)水产饲料的生产提供指导,促进水产养殖业的可持续发展。 展开更多
关键词 水产饲料 碳足迹 低碳 低氮 低磷
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外投料式滚筒筛分骨料的效率研究
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作者 陈水胜 张啸飞 吴专 《机械设计与制造》 北大核心 2025年第1期103-107,共5页
为了提高外投料式滚筒筛分骨料的效率,对其筛分过程进行研究。以(10~40)mm粒度范围的骨料为研究对象,基于离散元理论,利用EDEM建立筛分模型并结合其筛分过程进行模拟仿真,得到在一定条件时,其转速和进料角度对滚筒筛分效率的影响规律:... 为了提高外投料式滚筒筛分骨料的效率,对其筛分过程进行研究。以(10~40)mm粒度范围的骨料为研究对象,基于离散元理论,利用EDEM建立筛分模型并结合其筛分过程进行模拟仿真,得到在一定条件时,其转速和进料角度对滚筒筛分效率的影响规律:骨料筛分的最佳转速为15rpm,最佳进料角度为150°;通过正交实验模拟,得到了外投料式滚筒筛的滚筒转速、进料角度、进料量三因素对骨料筛分效率的显著性和最佳取值。仿真研究结果可以为外投料式滚筒筛的结构设计及其工艺参数优化提供借鉴和参考,具有较强的工程应用价值。 展开更多
关键词 外投料滚筒筛 骨料 EDEM 筛分效率 正交试验
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