期刊文献+
共找到440篇文章
< 1 2 22 >
每页显示 20 50 100
Technical-Economic Performance, Carcass and Meat Quality of COBB500 Broilers Fed Rations Incorporating Mango By-Product Feeds in Ivory Coast (West Africa)
1
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
下载PDF
Intoxication Induced by Urea Containing Diets in Broiler Chickens: Effect on Weight Gain, Feed Conversion Ratio, Hematological and Biochemical Profiles
2
作者 Mohammed Al-Zharani Mohammed Mubarak +2 位作者 Hassan Ahmed Rudayni Mahmoud M. Abdelwahab Mohammed Al-Eissa 《Advances in Bioscience and Biotechnology》 CAS 2023年第3期106-119,共14页
Urea as a source of cheap non-protein nitrogen is used to adulterate fish and meat meals which are basic components of broiler diets. The present study was carried out to elucidate the effects of urea on weight gain, ... Urea as a source of cheap non-protein nitrogen is used to adulterate fish and meat meals which are basic components of broiler diets. The present study was carried out to elucidate the effects of urea on weight gain, and hematological and biochemical profiles. A total of 48 broiler chicks were randomly allotted into 4 groups, designated Groups 1, 2, 3 and 4 of 12 birds each. Birds in Groups 2, 3 and 4 were fed on diets containing urea at the levels of 1%, 2.5% and 4%, respectively. Birds in Group 1 served as control and were not exposed to urea. Experimentation period was for 3 weeks and experiment was terminated when birds were 42 days of age. Body weight of all intoxicated birds at the various intervals was significantly decreased in comparison with that of the untreated control. Compared with control, all intoxicated broilers manifested significant (P ≤ 0.05) decrease in all hematological parameters involving erythrocytic and total leucocytic counts, Hemoglobin (Hb) and Packed Cell Volume (PCV) on a dose- and time-pattern. In comparison with the control levels, biochemical profile of the intoxicated birds disclosed significant decrease in blood glucose level and significant increase in serum uric acid, urea, Alkaline Phosphatase (ALP) and Lactate Dehydrogenase (LDH) levels. Based upon the present data, it was concluded that the addition of urea to broiler diets bears serious sequences concerning the general health condition, performance, weight gain, and hematological and biochemical profiles. 展开更多
关键词 UREA INTOXICATION broiler Chickens Weight Gain feed Conversion Ratio
下载PDF
Effects of “Bioactive” amino acids leucine, glutamate, arginine and tryptophan on feed intake and mRNA expression of relative neuropeptides in broiler chicks 被引量:3
3
作者 Songbo Wang Paul Khondowe +8 位作者 Shengfeng Chen Jianjian Yu Gang Shu Xiaotong Zhu Lina Wang Ping Gao Qianyun Xi Yongliang Zhang Qingyan Jiang 《Journal of Animal Science and Biotechnology》 SCIE 2012年第4期199-206,共8页
Feed intake control is vital to ensuring optimal nutrition and achieving full potential for growth and development in poultry. The aim of the present study was to investigate the effects of L-leucine, L-glutamate, L-t... Feed intake control is vital to ensuring optimal nutrition and achieving full potential for growth and development in poultry. The aim of the present study was to investigate the effects of L-leucine, L-glutamate, L-tryptophan and L-arginine on feed intake and the mRNA expression levels of hypothalamic Neuropeptide involved in feed intake regulation in broiler chicks. Leucine, glutamate, tryptophan or arginine was intra-cerebroventricularly (ICV) administrated to 4d-old broiler chicks respectively and the feed intake were recorded at various time points. Quantitative PCR was performed to determine the hypothalamic mRNA expression levels of Neuropeptide Y (NPY), agouti related protein (AgRP), pro-opiomelanocortin (POMC), melanocortin receptor 4 (MC4R) and corticotrophin releasing factor (CRF). Our results showed that ICV administration of L-leucine (0.15 or 1.5 μmol) significantly (P〈0.05) increased feed intake up to 2 h post-administration period and elevated both hypothalamic NPY and AgRP mRNA expression levels. In contrast, ICV administration of L-glutamate (1.6 μmol) significantly (P 〈 0.05) decreased feed intake 0.25, 0.5 and 2 h post-injection, and increased hypothalamic CRF and MC4R mRNA expression levels. Meanwhile, both L-tryptophan (10 or 100 μg) and L-arginine (20 or 200 μg) had no significant effect on feed intake. These findings suggested that L-leucine and L-glutamate could act within the hypothalamus to influence food intake, and that both orexigenic and anorexigenic Neuropeptide genes might contribute directly to these effects. 展开更多
关键词 broiler chicks feed intake HYPOTHALAMUS Intracerebroventricular (ICY) L-LEUCINE L-GLUTAMATE
下载PDF
Influence of Early Quantitative Feed Restriction on Performance and Carcass Characteristics of Broiler Chickens
4
作者 SHI Baoming SHAN Anshan CHAN Long 《Journal of Northeast Agricultural University(English Edition)》 CAS 2006年第2期140-144,共5页
An experiment was conducted to study the influence of eady quantitative feed restriction on the performance and carcass characteristics of broiler chickens. Two hundred 8-day-old commercial Avian male broiler chicks w... An experiment was conducted to study the influence of eady quantitative feed restriction on the performance and carcass characteristics of broiler chickens. Two hundred 8-day-old commercial Avian male broiler chicks were assigned to four groups randomly, with 50 broilers each. At the age of 8 days the broilers were restricted to 90%, 80% or 70% of the ad libitum intake for 7 days. When the restricion was finished, all birds received feed ad libitum again. The results showed that diet restriction resulted in a reduction in body weight and daily gain during the restriction period (P 〈0.05). The birds restricted to 90% of the ad libitum intake showed the occurring of growth compensation in the 3rd week. The birds restricted to 80% and 70% of the ad libitum intake had growth compensation in the 4th week. No significant differences between the effects of the restriction and the control on final body weight, growth rate, feed conversion efficiency and carcass characteristics (P 〈0.05). 展开更多
关键词 broiler early feed restriction PERFORMANCE carcass characteristics
下载PDF
The Influence of Feed Intake and Conditioned Reflex on Exocrine Pancreatic Function in Broiler Chicks 被引量:1
5
作者 Vladimir G. Vertiprakhov Ivan A. Egorov 《Open Journal of Animal Sciences》 2016年第4期298-303,共6页
The data of an experimental study of the influence of feeding and the conditional stimulus on digestive function in birds is presented. It is stated that feed consumption is a powerful stimulator of pancreatic secreti... The data of an experimental study of the influence of feeding and the conditional stimulus on digestive function in birds is presented. It is stated that feed consumption is a powerful stimulator of pancreatic secretion in broiler chicks. The secretory response of the pancreas was the highest in the morning when secretion of pancreatic juice was 1.8 times higher, amylase activity 3.2 times, proteases activity 3.3 times, lipase activity 2.1 times higher than before feeding (basal levels). The regulation of pancreatic activity is known to be complex-reflex with conditioned-reflex component being very important since it provides 25% higher juice secretion and 42% - 74% higher enzyme secretion compared to the basal levels during few minutes after the conditional signal. 展开更多
关键词 Pancreatic Juice Pancreatic Enzymes broiler Chicks Conditioned Reflex feedING
下载PDF
The Effect of Quantitative Feed Restriction Duration on Growth Performance and Carcass Characteristics of Broiler Chickens
6
作者 Ziphozihle Gobane Sindisile Goni +1 位作者 Denice Chikwanda Leocadia Zhou 《Open Journal of Animal Sciences》 2021年第4期635-645,共11页
<span style="font-family:Verdana;">The growth productivity of broilers is influenced by improving growth performance through improving body weight, average daily gain</span><span style="f... <span style="font-family:Verdana;">The growth productivity of broilers is influenced by improving growth performance through improving body weight, average daily gain</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> and feed conversion rate. The objective of the study was to determine the effect of quantitative feed restriction duration on growth performance and carcass characteristics of broilers. A total of 144 day-old broiler chicks were reared in a deep litter system until slaughter at 42 days. Chicks were randomly allocated to three treatments which were replicated three times with 16 birds per replicate. The three treatments were the control (T1), one week of feed restriction (T2), and two weeks of feed restriction (T3). Birds were fed with starter, grower and finisher diets. The average daily gain (ADG), average daily feed intake (ADFI)</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> and the feed conversion ratio (FCR) were computed for each week. Carcass weight</span><span style="font-family:;" "=""> </span><span style="font-family:Verdana;">and internal organs weights were measured. The body weight gained by the birds in T1 was similar </span><span style="font-family:Verdana;">to</span><span style="font-family:Verdana;"> the birds that were restricted for a week. The treatments had a significant effect on the average daily gain in week</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> 4, 5</span><span style="font-family:Verdana;">,</span><span style="font-family:;" "=""><span style="font-family:Verdana;"> and 6. The ADG for T2 was higher (P < 0.05) at week 5 after 1 week of restriction, than T1 and T3. The feed conversion ratio was significantly higher in T3 after 2 weeks of restriction. In T2 and T3, feed intake was significantly lower than in birds fed </span><i><span style="font-family:Verdana;">ad</span></i></span><i><span style="font-family:;" "=""> </span></i><i><span style="font-family:Verdana;">libitum</span></i><span style="font-family:Verdana;"> at week 4 at the start of the treatment. There was no significant effect on the relative weights of heart weights, liver, gizzard, feet</span><span style="font-family:Verdana;">,</span><span style="font-family:Verdana;"> and heads among the treatment groups except for intestine weight which was lower (P < 0.05) in T1 than T2 and T3. It was concluded that broilers that were restricted for one week had a positive result in growth performance. Feed restriction had minimal effect on the organ weights of broiler chickens.</span> 展开更多
关键词 Average Daily Gain Body Weight Gain broilerS feed Conversion Ratio feed Restriction DURATION
下载PDF
Effect of Feed Restriction on Broiler Chicks Prior to Slaughter
7
作者 Nadir Abdelraheem Magdi Mohammed Mohammed Ahmed Fujiang Hou 《Open Journal of Animal Sciences》 2019年第1期12-22,共11页
The present study was conducted to study the effect of feed restriction prior to slaughter on carcass weight of male broiler chicks from 32 to 40 days of age. A total number of 180 (Pure line) male broiler chicks were... The present study was conducted to study the effect of feed restriction prior to slaughter on carcass weight of male broiler chicks from 32 to 40 days of age. A total number of 180 (Pure line) male broiler chicks were taken randomly, labeled and divided into six groups. At 32 days of age, the experimental groups were put under the experimental feeding program. Group A fed ad libitum (control) while group B and C fed 120, 60 gm/bird/day for eight days, respectively. Group D and E fed 120, 60 gm/bird/day for four days respectively, followed by zero feeding for an extra 4 days. Group F deprived of food during the whole experimental period (8 days). The experimental diet was formulated to be approximately iso caloric-iso nitrogenous containing sorghum, groundnut cake, broiler concentrate, calcium, salt, lysine, methionine, and premix. The parameters taken were live body weight, feed intake, mortality, carcass, and non-carcass values. The effect of feed restriction program on male broiler chicks was not significant during the period from 32 to 34 days of age for parameters final live body weight, carcass weight, and dressing percentage, but net weight (gain or loss) was affected by feed restriction program and showed a significant difference (P < 0.01) between experimental groups. From 32 to 36 days of age male broilers subjected to feed restriction regimes showed the lowest reading for final live body weight, net weight (gain or loss) and carcass weight and the difference were significant (P 0.05) between experimental groups for dressing percentage during period from32 to 36 days of age. At the period from 32 to 38 days and the period from 32 to 40 days of age, all parameters were significantly affected by feed restriction program. It was concluded that carcass weight of broiler chickens can be controlled using different options of feed restriction programs according to the need of the market and the producer situation with special consideration to the economic return. 展开更多
关键词 feed RESTRICTION Prior to SLAUGHTER broiler CARCASS WEIGHT
下载PDF
我国肉鸡饲料价格波动特征及影响因素分析 被引量:1
8
作者 王燕 杨祥钊 《饲料研究》 CAS 北大核心 2024年第6期175-179,共5页
文章旨在分析肉鸡价格波动特征及影响因素,有利于推动禽类养殖业健康稳定发展。基于2002年1月-2022年12月我国252个肉鸡饲料企业样本数据,在通过平稳性检验后,采用VAR模型和方差分解法,从肉鸡饲料价格、供给和需求方面分析引起我国肉鸡... 文章旨在分析肉鸡价格波动特征及影响因素,有利于推动禽类养殖业健康稳定发展。基于2002年1月-2022年12月我国252个肉鸡饲料企业样本数据,在通过平稳性检验后,采用VAR模型和方差分解法,从肉鸡饲料价格、供给和需求方面分析引起我国肉鸡饲料价格波动的主要因素。结果显示,在供给层面,肉鸡饲料价格波动的主要影响因素为玉米存量和豆粕存量,第7期玉米存量和豆粕存量对当月肉鸡饲料价格的影响占比分别是30.78%和20.39%。在需求层面,在第7期农村居民人均可支配收入和可繁殖母鸡存栏量对肉鸡饲料价格的影响占比较高,分别为9.06%和6.87%。研究表明,肉鸡饲料价格波动受肉鸡饲料自身价格影响程度最大,随后依次为玉米存量、豆粕存量、农村居民人均可支配收入、可繁殖母鸡存栏量、鱼虾肉价格、肉鸡存栏量、牛肉价格和城镇居民人均可支配收入。 展开更多
关键词 肉鸡饲料价格 供需结构 玉米存量 豆粕存量
下载PDF
不同饲养密度对罗斯308白羽肉鸡生产性能的影响
9
作者 王俊锋 陶梦筱 +5 位作者 赵云焕 付荣顺 朱凤霞 谢文文 彭峰 刘英丽 《中国饲料》 北大核心 2024年第10期1-4,共4页
文章旨在探讨不同饲养密度对罗斯308白羽肉鸡生产性能的影响。试验将297只7日龄肉鸡随机分成3组,即处理组Ⅰ(13只/m^(2))、Ⅱ(20只/m^(2))和Ⅲ(27只/m^(2)),每组9个重复(笼),即上层、中层和下层各3个重复(笼),试验为期32 d,饲养至38日... 文章旨在探讨不同饲养密度对罗斯308白羽肉鸡生产性能的影响。试验将297只7日龄肉鸡随机分成3组,即处理组Ⅰ(13只/m^(2))、Ⅱ(20只/m^(2))和Ⅲ(27只/m^(2)),每组9个重复(笼),即上层、中层和下层各3个重复(笼),试验为期32 d,饲养至38日龄。结果表明,整个试验期(2~6周龄),处理组Ⅰ肉鸡采食量分别比处理组Ⅱ和Ⅲ显著提高4.28和5.49 g(P<0.05);处理组Ⅰ的肉鸡日增重最大,分别处理组Ⅱ和Ⅲ显著提高2.39和3.11 g(P<0.05);各处理组肉鸡料肉比和成活率差异均不显著(P>0.05)。综合分析,13只/m^(2)的饲养密度效果较佳。 展开更多
关键词 罗斯308白羽肉鸡 饲养密度 生产性能
下载PDF
发酵罗汉果渣对黄羽肉鸡肠道形态和菌群的影响
10
作者 孙涛 梁丽芬 +4 位作者 许艺兰 陈静 叶泉清 袁梦婷 宾石玉 《广西师范大学学报(自然科学版)》 CAS 北大核心 2024年第1期191-199,共9页
本文旨在研究发酵罗汉果渣对黄羽肉鸡肠道形态和菌群的影响。选用1日龄健康的黄羽肉鸡360羽,随机分为4个组(Ⅰ、Ⅱ、Ⅲ和Ⅳ),每组6个重复,每重复15羽。对照组(Ⅰ组)饲喂基础饲粮,Ⅱ、Ⅲ和Ⅳ组于1~21日龄分别饲喂在基础饲粮中添加1%、3%... 本文旨在研究发酵罗汉果渣对黄羽肉鸡肠道形态和菌群的影响。选用1日龄健康的黄羽肉鸡360羽,随机分为4个组(Ⅰ、Ⅱ、Ⅲ和Ⅳ),每组6个重复,每重复15羽。对照组(Ⅰ组)饲喂基础饲粮,Ⅱ、Ⅲ和Ⅳ组于1~21日龄分别饲喂在基础饲粮中添加1%、3%和5%的发酵罗汉果渣等量替代玉米;于22~42日龄和43~70日龄分别在基础饲粮中添加5%、8%和10%的发酵罗汉果渣等量替代玉米,试验期70 d。结果显示:与Ⅰ组相比,21日龄和42日龄,Ⅱ、Ⅲ和Ⅳ组十二指肠、空肠、回肠的绒毛高度、隐窝深度及V/C值的差异不显著。70日龄,Ⅲ、Ⅳ组十二指肠隐窝深度分别降低36.01%(P<0.05)和33.46%(P<0.05),V/C值分别提高78.05%(P<0.05)和69.98%(P<0.05)。肠道菌群中,Ⅰ、Ⅲ组共有的OTU数目为537、特有OTU数目分别为55和7;在门水平上,核心菌门是厚壁菌门、拟杆菌门和变形菌门,其中Ⅲ组的变形菌门和肠杆菌门相对丰度显著低于Ⅰ组(P<0.05);在属水平上,Ⅲ组梭状芽孢杆菌群的相对丰度显著高于Ⅰ组(P<0.05),两组的α多样性指数和β多样性指数的差异不显著(P>0.05)。发酵罗汉果渣可改善黄羽肉鸡肠道微生态环境,促进其肠道健康。 展开更多
关键词 罗汉果 发酵饲料 肉鸡 肠道形态 物种多样性
下载PDF
发酵饲料对肉鸡生长性能及经济效益的影响
11
作者 余素芳 庞孟瑶 《饲料研究》 CAS 北大核心 2024年第7期44-48,共5页
试验旨在研究发酵饲料对肉鸡生长性能、肉品质及经济效益的影响。试验选择1 600只AA肉鸡分成4组,每组4个重复,每个重复100只肉鸡。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加2.5%、5.0%及10.0%发酵饲料。试验期42 d。结果显示:与... 试验旨在研究发酵饲料对肉鸡生长性能、肉品质及经济效益的影响。试验选择1 600只AA肉鸡分成4组,每组4个重复,每个重复100只肉鸡。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加2.5%、5.0%及10.0%发酵饲料。试验期42 d。结果显示:与对照组相比,22~42日龄,5.0%组和10.0%组42日龄体重、平均日增重及平均日采食量显著升高(P<0.05),料重比显著降低(P<0.05);1~42日龄,5.0%组和10.0%组的平均日增重及平均日采食量显著升高(P<0.05),料重比显著降低(P<0.05),5.0%组和10.0%组肌肉pH24 h值、L*值、b*值及蒸煮损失显著降低(P<0.05),2.5%组、5.0%组和10.0%组肌肉剪切力显著降低(P<0.05),5.0%组和10.0%组肌肉中甘氨酸、肌苷酸含量显著升高(P<0.05)。2.5%组、5.0%组和10.0%组的增重收益分别比对照组提高了2.55%、8.74%、12.26%,养殖利润分别提高了2.69%、11.73%、13.15%。研究表明,肉鸡饲喂适量的发酵饲料可以提高生长性能,改善肉品质,增加养殖利润,饲喂5%~10%的发酵饲料较为适宜。 展开更多
关键词 发酵饲料 AA肉鸡 生长性能 肉品质 经济效益
下载PDF
不同油脂来源及添加水平对肉鸡颗粒饲料质量、生长性能和肉品质的影响
12
作者 李香月 杨洁 +5 位作者 李军国 李俊 姚婷 董颖超 牛力斌 商方方 《动物营养学报》 CAS CSCD 北大核心 2024年第3期1612-1627,共16页
本试验旨在研究不同油脂来源及添加水平对肉鸡颗粒饲料质量、生长性能、肉品质及血清生化指标的影响。试验选取1日龄白羽肉鸡960只,随机分为6组,每组8个重复,每个重复20只鸡。采用双因素试验设计,饲粮中油脂来源分别为大豆油、膨化大豆... 本试验旨在研究不同油脂来源及添加水平对肉鸡颗粒饲料质量、生长性能、肉品质及血清生化指标的影响。试验选取1日龄白羽肉鸡960只,随机分为6组,每组8个重复,每个重复20只鸡。采用双因素试验设计,饲粮中油脂来源分别为大豆油、膨化大豆和脂肪粉,油脂添加水平分别为3%和5%。试验期42 d,分为前期(1~21日龄)和后期(22~42日龄)2个阶段。结果表明:1)在颗粒饲料质量方面,脂肪粉组成型率、颗粒耐久性和硬度显著高于其他2组(P<0.05);相比于3%添加水平,5%添加水平显著降低了颗粒饲料成型率、颗粒耐久性和硬度,且除脂肪粉组外,豆油组和膨化大豆组颗粒饲料颗粒耐久性显著降低(P<0.05),并均低于90%。2)在肉鸡生长性能方面,与大豆油组相比,5%脂肪粉组前期料重比显著降低(P<0.05);膨化大豆组后期和全期平均日增重显著降低(P<0.05)。3)在肉品质和血清生化指标方面,与大豆油组相比,脂肪粉组肉鸡胸肌剪切力和24 h滴水损失显著降低(P<0.05),膨化大豆组胸肌24 h滴水损失显著降低(P<0.05);膨化大豆组和脂肪粉组血清三碘甲状原氨酸(T3)含量和T3/甲状腺素(T4)值显著提高(P<0.05)。相比于3%添加水平,5%添加水平显著降低了肉鸡胸肌剪切力(P<0.05)。综上所述,添加5%脂肪粉能够提高肉鸡颗粒饲料质量、肉品质以及甲状腺的功能活性。 展开更多
关键词 脂肪粉 膨化大豆 颗粒饲料质量 肉鸡 生长性能 肉品质 血清生化指标
下载PDF
高粱替代玉米对颗粒饲料质量和肉鸡生长性能、屠宰性能、肉品质及营养物质表观消化率的影响
13
作者 廖莹 李星 +6 位作者 杨洁 李军国 李俊 沈水宝 刘巍 高秋玲 隆育瑶 《动物营养学报》 CAS CSCD 北大核心 2024年第5期2970-2981,共12页
本试验旨在研究高粱替代玉米对颗粒饲料质量和肉鸡生长性能、屠宰性能、肉品质及营养物质表观消化率的影响。本试验以960只1日龄爱拔益加(AA)肉鸡为研究对象,将其随机分成6组,每组8个重复,每个重复20只鸡。试验分为饲养前期(1~21日龄)... 本试验旨在研究高粱替代玉米对颗粒饲料质量和肉鸡生长性能、屠宰性能、肉品质及营养物质表观消化率的影响。本试验以960只1日龄爱拔益加(AA)肉鸡为研究对象,将其随机分成6组,每组8个重复,每个重复20只鸡。试验分为饲养前期(1~21日龄)和后期(22~42日龄)2个阶段。对照组饲喂不添加高粱的常规玉米-豆粕型饲粮,试验组饲喂以高粱分别替代常规玉米-豆粕型饲粮中20%、40%、60%、80%和100%玉米的试验饲粮。结果显示:1)在颗粒饲料质量方面,随着高粱替代玉米比例的增加,颗粒饲料的成型率总体呈上升趋势,但各组间无显著差异(P>0.05);颗粒饲料的颗粒耐久性(PDI)呈先降低后升高的趋势,且均高于90%;颗粒饲料的硬度、淀粉糊化度以及亮度(L^(*))、红度(a^(*))和黄度(b^(*))值均持续降低。20%替代组与对照组在颗粒饲料成型率、硬度、PDI及色泽方面均无显著差异(P>0.05)。2)在肉鸡生长性能方面,随着高粱替代玉米比例的增加,肉鸡各阶段的末重、平均日采食量、平均日增重及死淘率均呈下降趋势,料重比呈上升趋势。20%替代组与对照组相比,肉鸡各阶段的平均日增重、平均日采食量和料重比均无显著差异(P>0.05)。3)在屠宰性能、肠道指数和肉品质方面,各组肉鸡的屠宰性能指标、各肠段相对长度和相对重量以及腿肌和胸肌的L*和a*值均无显著差异(P>0.05)。4)在营养物质表观消化率方面,随着高粱替代玉米比例的增加,饲养前期和后期的粗蛋白质和干物质表观消化率均呈下降趋势,在饲养后期20%替代组与对照组粗蛋白质和干物质表观消化率差异不显著(P>0.05)。综上所述,综合考虑高粱替代玉米对颗粒饲料质量以及肉鸡生长性能、屠宰性能、肠道发育、肉品质及营养物质表观消化率的影响,建议肉鸡饲粮中高粱替代玉米比例在前期不超过20%,在后期不超过60%。 展开更多
关键词 高粱 颗粒饲料质量 肉鸡 生长性能 肉品质 营养物质表观消化率
下载PDF
复合益生菌对染菌白羽肉鸡生长性能及肠道形态、菌群的影响
14
作者 徐美余 罗成莹 +4 位作者 辛维岗 张关令 王春 李亚萍 林连兵 《食品与生物技术学报》 CAS CSCD 北大核心 2024年第2期97-106,共10页
为探究白羽肉鸡在产气荚膜梭菌感染条件下,在基础日粮中添加不同水平的复合益生菌对白羽肉鸡生长性能、肠道形态及肠道菌群结构的影响。使用产气荚膜梭菌感染3日龄的健康白羽肉鸡,在基础饲粮中分别添加不同剂量(高500 mg/kg、中200 mg/k... 为探究白羽肉鸡在产气荚膜梭菌感染条件下,在基础日粮中添加不同水平的复合益生菌对白羽肉鸡生长性能、肠道形态及肠道菌群结构的影响。使用产气荚膜梭菌感染3日龄的健康白羽肉鸡,在基础饲粮中分别添加不同剂量(高500 mg/kg、中200 mg/kg、低50 mg/kg)由枯草芽孢杆菌和地衣芽孢杆菌组成的复合益生菌与金霉素制剂(50μg/g)饲喂21 d。利用第二代测序技术测定白羽肉鸡盲肠肠道菌群,分析其多样性和组间差异,并记录其对生长性能和肠道形态的影响。结果显示,饲喂高、中剂量的复合益生菌显著降低了白羽肉鸡的料肉质量比,提升了肠道绒隐比(P<0.05),与金霉素制剂组结果相似。同时,饲喂不同剂量的复合益生菌和金霉素制剂后,白羽肉鸡盲肠肠道菌群的丰富度和多样性均发生了变化,复合益生菌均能够显著提升Simpson指数(P<0.05)。此外,比较复合益生菌、金霉素制剂与空白组在门水平上的优势菌群变化,发现软壁菌门相对丰度均显著下降(P<0.05)。在属水平上,发现Fournierella属的相对丰度显著升高,Lachnospiraceae属的相对丰度显著下降(P<0.05)。揭示了复合益生菌对白羽肉鸡的生长性能和肠道菌群结构均有促进作用,为更全面了解复合益生菌替代抗生素应用于白羽肉鸡养殖提供重要的理论依据。 展开更多
关键词 产气荚膜梭菌 白羽肉鸡 复合益生菌 饲料添加剂 肠道菌群
下载PDF
日粮添加生物法苹果酸在中试条件下对肉鸡生产的影响
15
作者 卢欣欣 郭妍婷 +3 位作者 王晶 张海军 邱凯 武书庚 《中国饲料》 北大核心 2024年第5期69-74,共6页
本试验旨在评估生物法苹果酸产品在肉鸡大群试验中的促生长和肉质改善效果,为生物法苹果酸在肉鸡饲粮中的推广应用提供数据支撑。选用1000只1日龄的爱拔益加肉仔鸡公雏,随机分为2个处理,每个处理10个重复,每个重复50只鸡。对照组饲喂玉... 本试验旨在评估生物法苹果酸产品在肉鸡大群试验中的促生长和肉质改善效果,为生物法苹果酸在肉鸡饲粮中的推广应用提供数据支撑。选用1000只1日龄的爱拔益加肉仔鸡公雏,随机分为2个处理,每个处理10个重复,每个重复50只鸡。对照组饲喂玉米-豆粕型基础日粮,处理组在基础日粮中添加0.8%生物法苹果酸。试验持续42 d。结果表明:日粮添加0.8%生物法苹果酸对肉鸡采食量、死淘率无显著影响(P> 0.05),但能通过增加试验后期(22~42 d)平均日增重(7.53%)(P=0.001)和降低料重比(4.47%)(P=0.002)有效增加肉鸡42 d出栏重(4.93%)(P <0.001);在屠宰性能和肉品质方面,日粮添加苹果酸对全净膛率、胸肌率、腿肌率、腹脂率、胸肌肉色和pH均无显著影响(P> 0.05),但能显著降低胸肌肉的滴水损失(11.31%)(P <0.001)。日粮添加0.8%苹果酸可以在中试条件下有效提高肉鸡的生长性能,增强鸡肉保水性,改善肉品质。因此,本研究推荐生物法苹果酸作为饲料添加剂,在集约化养殖的背景下应用于肉鸡饲粮。 展开更多
关键词 饲料添加剂 苹果酸 肉鸡 生长性能 肉品质
下载PDF
高脂饲喂对肉鸡腹脂和肝脏组织RNA可变剪接的影响
16
作者 敖广宇 陈庚华 +1 位作者 夏燚琳 罗文 《广东农业科学》 CAS 2024年第2期112-123,共12页
【目的】腹脂过度沉积会降低肉鸡抗病力和屠宰率。RNA可变剪接是影响基因功能的重要调控方式,对肉鸡腹脂沉积过程的RNA可变剪接事件进行系统分析,有助于进一步了解肉鸡腹脂沉积的分子调控机理。【方法】利用高脂饲喂肉鸡和普通饲喂肉鸡... 【目的】腹脂过度沉积会降低肉鸡抗病力和屠宰率。RNA可变剪接是影响基因功能的重要调控方式,对肉鸡腹脂沉积过程的RNA可变剪接事件进行系统分析,有助于进一步了解肉鸡腹脂沉积的分子调控机理。【方法】利用高脂饲喂肉鸡和普通饲喂肉鸡肝脏组织和腹脂组织的转录组测序结果,鉴定高脂饲喂过程中肉鸡腹脂和肝脏组织的差异表达和差异剪接基因。采用GO功能注释、KEGG通路富集分析和Metascape富集分析对显著差异剪接基因进行分析,并对显著差异剪接事件进行可视化处理,以及分析调控这些差异剪接事件的剪接因子。【结果】对高脂饲喂肉鸡与普通饲喂肉鸡的腹脂和肝脏组织进行转录组测序,在腹脂组织中发现233个显著差异表达基因和349个显著差异剪接基因,对显著差异剪接基因进行富集分析,发现显著差异剪接基因主要富集于细胞分裂、细胞生长等细胞增殖相关生物学进程,还富集于甘油磷脂代谢和胰岛素信号通路等脂肪生成相关通路。在肝脏组织中发现276个显著差异表达基因和224个显著差异剪接基因,对显著差异剪接基因进行富集分析,发现显著差异剪接基因主要富集于蛋白质乙酰化、蛋白质内部氨基酸乙酰化和mRNA加工等细胞代谢相关生物进程,还富集于胰岛素信号通路、胰高血糖素信号通路、AMPK信号通路等脂肪生成相关通路。在腹脂和肝脏的显著差异剪接基因中,共筛选到影响肉鸡腹脂沉积性状的相关候选基因4个,包括GPAT4、RELCH、CYP39A1和PPARA。【结论】研究结果初步揭示高脂饲喂下肉鸡腹脂和肝脏组织的RNA可变剪接调控规律。推断高脂饲喂可能通过影响基因可变剪接过程,进而激活前脂肪细胞的增殖和脂肪生成相关细胞代谢,从而导致肉鸡的腹脂沉积现象;剪接因子对靶基因的调控显著参与影响肉鸡的腹脂沉积过程。 展开更多
关键词 杏花鸡 高脂饲料 腹脂沉积 转录组 可变剪接 差异表达基因
下载PDF
益生菌发酵饲料在肉鸡养殖中的应用
17
作者 梁远丽 《养殖与饲料》 2024年第6期49-52,共4页
[目的]寻找有效的替抗增效产品,推动肉鸡养殖业的健康高质量发展。[方法]查阅相关文献,简述了益生菌发酵饲料的概念、常用菌种和饲喂优势,综述了益生菌发酵饲料在肉鸡养殖中的应用情况。[结果]不同的益生菌菌种对发酵饲料的品质有较大... [目的]寻找有效的替抗增效产品,推动肉鸡养殖业的健康高质量发展。[方法]查阅相关文献,简述了益生菌发酵饲料的概念、常用菌种和饲喂优势,综述了益生菌发酵饲料在肉鸡养殖中的应用情况。[结果]不同的益生菌菌种对发酵饲料的品质有较大的影响。通过有益菌发酵改变饲料的营养含量,具有提高饲料营养价值、提升饲料利用率、提高动物生产性能、提高动物免疫能力、抑制病原菌、改善动物肉质品质、减少养殖环境污染等作用。应用于肉鸡养殖生产后,可以明显改善肉鸡肠道菌群结构、促进生长,增强免疫功能,提升鸡肉品质。[结论]益生菌发酵饲料不仅可以促进肉鸡的生长性能和免疫力,还可以提高肉鸡产品的品质和安全性,为肉鸡养殖业带来较大的经济效益,具有广阔的市场前景。 展开更多
关键词 益生菌 发酵饲料 肉鸡 肠道健康 生长性能 免疫功能
下载PDF
肉种鸡生产过程中的能量限饲
18
作者 郭志有 赵国力 +1 位作者 任金礼 寇荟阔 《中国畜禽种业》 2024年第1期116-122,共7页
由于肉种鸡较强的采食能力,生产过程中需要通过限制饲喂控制其体重,以防增重过快导致生长期生殖系统发育不平衡和后期脂肪积累导致繁殖性能快速下降。该文主要从动物营养与饲料加工和肉种鸡生产饲喂程序方面对肉种鸡生产过程中的能量摄... 由于肉种鸡较强的采食能力,生产过程中需要通过限制饲喂控制其体重,以防增重过快导致生长期生殖系统发育不平衡和后期脂肪积累导致繁殖性能快速下降。该文主要从动物营养与饲料加工和肉种鸡生产饲喂程序方面对肉种鸡生产过程中的能量摄入限制进行综述,其中动物营养方向主要是降低单位重量饲料中营养物质含量尤其是代谢能水平,饲料加工方向主要是颗粒料的使用保障各种营养物质均衡摄入,肉种鸡生产饲喂程序方向主要是改变肉种鸡日常饲喂模式和周饲喂总量。在种母鸡产蛋过程中,综合鸡群产蛋率与每天每只鸡饲喂量来执行能量限饲,以充分发挥种鸡产蛋性能和繁殖性能。 展开更多
关键词 肉种鸡 能量限制 繁殖能力 限制饲喂 产蛋率
下载PDF
Effect of Dietary Electrolyte Balance on Water Intake, Litter Moisture and Production of Broiler chicks at Pre-Starter and Starter Phases 被引量:4
19
作者 Ibukun Olukorede Popoola Debola Olusegun Oshibanjo +3 位作者 Oluwabukola Rashidat Popoola Titilayo Adetola Okuneye Ibinabo Imuetinyan Ilaboya Eustace Ayemere Iyayi 《Open Journal of Animal Sciences》 2019年第4期472-480,共9页
Underestimating the negative impacts of ammonia produced in litters of poultry birds raised under high temperature-humidity index is dangerous, as broiler chickens (BC) are sensitive to high ammonia concentrations whi... Underestimating the negative impacts of ammonia produced in litters of poultry birds raised under high temperature-humidity index is dangerous, as broiler chickens (BC) are sensitive to high ammonia concentrations which can result in blindness and overall decrease in productive performance. Hence, it is ideal to maintain litter moisture by optimizing the utilization of water by broiler chicks. The balance of acid-base in broilers could be enhanced by supplementing diets or water of BC under heat stress with electrolytes. However, electrolytes increase water intake and might affect litter quality. Therefore, effect of varying dietary electrolyte balance (DEB) on water intake (WI), litter moisture (LM) and productive performance of BC were investigated at pre-starter and starter phases using a total of three hundred, 1-day-old Arbor Acre chicks that were randomly allotted to six dietary treatments [210 (T1), 240 (T2), 270 (T3), 300 (T4), 330 (T5) and 360 (T6)] mEq/Kg DEB, in a completely randomised design. Birds were reared at pre-starter phase (PSP) of 0 - 14 days and starter phase (SP) of 14 - 21 days, under the temperature-humidity index of 24.97 - 35.19. Water intake and litter moisture were monitored. Data were analysed using descriptive statistics and ANOVA at α0.05. Water intake was enhanced at PSP and SP in birds on 360 mEq/kg, but with increased litter moisture. However, a dietary electrolyte balance of 270 mEq/kg improved performances of broiler chicks at pre-starter and starter phases. 展开更多
关键词 broilerS Electrolytes feed Conversion Ratio Heat Stress HOMEOSTASIS LITTER MOISTURE
下载PDF
Application of omics technologies for a deeper insight into quali-quantitative production traits in broiler chickens:A review 被引量:1
20
作者 Marco Zampiga Joshua Flees +2 位作者 Adele Meluzzi Sami Dridi Federico Sirri 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2018年第4期751-768,共18页
The poultry industry is continuously facing substantial and different challenges such as the increasing cost of feed ingredients, the European Union's ban of antibiotic as growth promoters, the antimicrobial resis... The poultry industry is continuously facing substantial and different challenges such as the increasing cost of feed ingredients, the European Union's ban of antibiotic as growth promoters, the antimicrobial resistance and the high incidence of muscle myopathies and breast meat abnormalities. In the last decade, there has been an extraordinary development of many genomic techniques able to describe global variation of genes, proteins and metabolites expression level. Proper application of these cutting-edge omics technologies(mainly transcriptomics, proteomics and metabolomics) paves the possibility to understand much useful information about the biological processes and pathways behind different complex traits of chickens. The current review aimed to highlight some important knowledge achieved through the application of omics technologies and proteo-genomics data in the field of feed efficiency, nutrition, meat quality and disease resistance in broiler chickens. 展开更多
关键词 broiler CHICKEN feed efficiency MEAT quality NUTRITION OMICS TECHNOLOGIES
下载PDF
上一页 1 2 22 下一页 到第
使用帮助 返回顶部