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The Relationship between Genetic Polymorphisms of Three Gene Loci and Growth Characters of Haimen Goats
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作者 李拥军 李太坤 +3 位作者 张丽 李文婷 张浩 施健飞 《Agricultural Science & Technology》 CAS 2010年第6期112-114,182,共4页
[Objective] The paper aims to study the relationship between genetic polymorphisms of three gene loci and growth character of Haimen Goats to provide reference to promote Haimen Goat growth character and cultivate Hai... [Objective] The paper aims to study the relationship between genetic polymorphisms of three gene loci and growth character of Haimen Goats to provide reference to promote Haimen Goat growth character and cultivate Haimen Goat new strain of fast-growth.[Method] We processed analysis and related statistical analysis on three gene loci of Haimen Goats with PCR-RFLP and PCR-SSCP.[Result] The results suggested that there were two genotypes in MSTN gene IntronⅡ,GH gene exonⅠ and GH gene exonⅡ in Haimen Goats.Different genotypes of these gene loci had different effects on relative growth character of Haimen Goats.[Conclusion] This study had a significant meaning about promoting Haimen Goat avoirdupois by marker assistant option. 展开更多
关键词 Haimen goats MSTN GH POLYMORPHISMS growth character
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Effects of Lithological Characters on the Growth of Cunninghamia lanceolata
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作者 刘映良 谢双喜 丁贵杰 《Agricultural Science & Technology》 CAS 2009年第6期94-96,107,共4页
Objective The aim was to reveal relationship between lithological character soil and productivity of Cunninghamia lanceolata and lay a foundation for systemic management of C. lanceolata fast-growing and high yield pl... Objective The aim was to reveal relationship between lithological character soil and productivity of Cunninghamia lanceolata and lay a foundation for systemic management of C. lanceolata fast-growing and high yield plantation. Method By using experimental ecology method and variance analysis, the biomass and growth of planting eleven years' C. lanceolata on the soils with six different lithologicel characters were studied. Result The effects of soils with six different lithological characters on the height, diameter growth and biomass of C. lanceolata were different, in which the growth order of C. lanceolata was: Feldspathic quartzy sandstone ( average height 523. 270 cm, average diameter 4.720 cm, average individual biomass 5.059kg) 〉 Basalt ( average height 511. 570 cm, average diameter 4.650 cm, average individual biomass 4.848 kg) 〉 Quartzy sandstone 〉 Blastopsammite 〉 The Quarternary Period red clay 〉 Coal-series siliceous sand-shale, and the difference was smaller between the last two lithological characters. Conclusion Feldspathic quartzy sandstone and Basalt are beneficial to C. lanceolata. 展开更多
关键词 Cunninghamia lanceolata Lithological character Height growth Diameter growth BIOMASS
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Variance Analysis of Growth Characteristics and Partial Production and Quality Characters of Different Tobacco Varieties
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作者 母少东 祖庆学 +6 位作者 邓兆权 赵雍平 段琼 朱祖发 谭建 刁朝强 陈兵林 《Agricultural Science & Technology》 CAS 2016年第12期2771-2776,共6页
Objective] This study was conducted to discuss growth characteristics and partial production and quality characters of different varieties, so as to provide can-didates for tobacco production as wel as a theoretical b... Objective] This study was conducted to discuss growth characteristics and partial production and quality characters of different varieties, so as to provide can-didates for tobacco production as wel as a theoretical basis for variety deployment in Guizhou. [Method] ‘K326’ was used as control, the experiment for variance analysis of growth characteristics and partial production and quality characters of dif-ferent tobacco varieties was carried out in Fengsan Town, Kaiyang County, Guizhou Province in 2015. [Result] GY8 grew faster in early stages and slower in late stages, the growth periods of GY2 (130 d) and GY5(129 d) were the longest, while those of Yun85 (121 d) and Yun87 (121 d) were the shortest; and GY2, GY5 and GY8 had larger plant heights, maximum leaf widths and maximum leaf areas, and Yun85, Yun87 and K326 showed larger stem girths and maximum leaf lengths. Yun87 exhibited lower natural incidences of diseases, while Yun85 and GY8 showed higher incidences of diseases. GY2, GY5 and GY8 had higher nicotine, total nitro-gen, K and Cl contents, while Yun85, Yun87 and K326 had higher total sugar and reducing sugar contents and higher total sugar/nicotine ratio. Yun85 and Yun87 showed better economic characters, while GY5 and GY8 showed poorer economic characters. [Conclusion] Yun85 and Yun87 have quality characters better than GY2 and GY8, field natural incidences of diseases lower than GY2 and GY8, and better economic characters, and thus could serve as candidates in future flue-cured tobac-co production in Guizhou. 展开更多
关键词 VARIETIES growth characteristics Production and quality characters Dif-ference Flue-cured tobacco
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Effects of Salicylic Acid on the Growth and Some Physiological Characters in Salt Stressed Tomato Plants ( Solanum L ycopersicum)
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作者 Hela Ben Ahmed Nizar Dhaou Salma Wasti Hajer Mimouni Ezzeddine Zid 《Journal of Life Sciences》 2011年第10期838-843,共6页
Excessive soil salinity is an important constraint limiting the distribution of plants in natural habitats, and is an increasingly severe agricultural problem in arid and semi-arid regions. Higher salinity levels caus... Excessive soil salinity is an important constraint limiting the distribution of plants in natural habitats, and is an increasingly severe agricultural problem in arid and semi-arid regions. Higher salinity levels caused significant reduction in growth parameters like leaf area, leaf length and root and shoot dry weight. Salicylic acid (SA), a plant phenolic is now considered as a hormone-like endogenous regulator, and its role in the defence mechanisms against biotic stressors has been well documented. In recent years its role has been widely investigated in abiotic stress (salinity, drought, water deficit and so on). The aim of the present work was to study the effects of salicylic acid on growth and some physiological characters of salt stressed tomato plants. The presence of salicylic acid at low concentration (0.01 mM) in culture medium riched with NaCl 100 mM (6 g·L^-1) improves the tolerance of tomato cv. Golden Sunrise to salinity. This amelioration results in stimulation of growth and development of plants. The applied of SA in saline medium induce: (i) an increase in chlorophyll content; (ii) a better supply of essential elements in plant growth, such as K+; (iii) a decrease in toxic ions such Na+ and CI in aerial organs; and (iv) an additional synthesis of organic solutes and osmoprotectors like proline and proteins. All these results suggest that salicylic acid could be successfully used in alleviating depressive effects of salt on the productivity of the cultivated tomato. 展开更多
关键词 AMELIORATION growth physiological characters salicylic acid (SA) SALINITY Solanum lycopersicum.
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Effects of Plastic Film Mulching on Physical Characters of Soil and Yield and Yield Components of Sweet Potato 被引量:5
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作者 张超凡 黄艳岚 +2 位作者 周虹 张亚 张道微 《Agricultural Science & Technology》 CAS 2015年第11期2379-2385,2393,共8页
Field experiments were carried out to study the effects of plastic film mulching on soil physical characters, including soil temperature, soil moisture content and soil bulk density, and yield and yield components of ... Field experiments were carried out to study the effects of plastic film mulching on soil physical characters, including soil temperature, soil moisture content and soil bulk density, and yield and yield components of sweet potato. The results showed that plastic filming mulching increased soil temperature. Considering the soil temperature-increasing effect, the treatments ranked as black plastic film treatment 〉 white plastic film treatment 〉 control. However, with the deepening of soil layer, the warming effect of plastic film mulching was weakened. Black or white plastic film mulching was conducive to low T/R value, especially in the early growth stage of sweet potato. Plastic film mulching significantly improved the storage root yield of sweet potato. In terms of yield-improving effect, the treatments ranked as black plastic film treatment 〉 white plastic film treatment 〉 control. The storage root num- ber per plant showed a downward trend, but the weight of single storage root was increased. 展开更多
关键词 Plastic film mulching Sweet potato Soil physical characters YIELD growth and development
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Growth Character of YBaCuO Thin Film Deposited by DC-planar Magnetron Sputtering
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作者 王超群 杨秉川 +1 位作者 王小平 王瑞坤 《Rare Metals》 SCIE EI CAS CSCD 1993年第1期57-61,共5页
The growth character and microstructure of high-T_c supereonducting YBCO thin films deposited on vari- ous substrates have been studied by X-ray diffraction, TEM and SEM.The results show that when the substrate temper... The growth character and microstructure of high-T_c supereonducting YBCO thin films deposited on vari- ous substrates have been studied by X-ray diffraction, TEM and SEM.The results show that when the substrate temperaturc is around 700~800℃ the films have a highly oriented texture with c-axis pependicular to the substrate. The structure of the single crystalline YBCO films grown epitaxially at optimal substrate tem- perature of 800℃ has been established by X-ray diffraction using Seemann-Bohlin geometry (SB). Brentano-Bragg geometry(BB),transmission Laue method and TEM. The lattice matching required for epitaxial growth is achievcd by azimuthal adjustment of the film plane with respect to the substrate plane. The sperior growth is demonstrated by film properties such as critical current density(2.4×10~6 A /cm^2,3.4× 10~6 A/cm^2 and 4.7×l0~6 A/cm^2) for films deposited on YSZ[(Zr(Y)O_2],SrTiO_3 and LaAIO_3 respectively at 77 K and zero fie1d. 展开更多
关键词 SUPERCONDUCTOR Thin film BaCuO growth character Microstructure
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Associations between Mental Health Outcomes and Adverse Childhood Experiences and Character Strengths among University Students in Southern China
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作者 Yulan Yu Rassamee Chotipanvithayakul +2 位作者 Hujiao Kuang Wit Wichaidit Chonghua Wan 《International Journal of Mental Health Promotion》 2023年第12期1343-1351,共9页
Adverse childhood experiences(ACEs)can negatively affect mental health,whereas character strengths seem to be positively correlated with mental health.Detailed information on the history of ACEs among university stude... Adverse childhood experiences(ACEs)can negatively affect mental health,whereas character strengths seem to be positively correlated with mental health.Detailed information on the history of ACEs among university students in China and the extent which mental health is associated with ACEs and character strengths can contribute to the needed empirical evidence for relevant stakeholders.Objectives of this study are 1)to estimate the prevalence of ACEs among undergraduate students in Southern China;and 2)to assess the extent which mental health outcomes(positive growth,well-being,and depression)are associated with ACEs and character strengths among undergraduate students in Southern China.We conducted a self-administered survey amongfirst and second-year students at a university in Southern China and analyzed data using descriptive statistics and linear regression analyses.Among the 779 students who completed the questionnaire,283 were males,439 were females,and 57 did not indicate their gender.The prevalence of ACEs among the participants was 32.1%.History of ACEs was associated with lower positive growth score(Adjusted Beta=-0.20;95%CI=-0.37,-0.02;p=0.030)and lower well-being score(Adjusted Beta=-1.13;95%CI=-2.04,-0.23;p=0.014).Vitality domain of character strength was associated with all three mental health outcomes after adjusting for covariables(all p-values<0.001).Our studyfindings provide empirical evidence for stakeholders in university mental health.However,caveats regarding lack of temporality,selection bias,social desirability bias,and lack of generalizability should be considered in the interpretation of the studyfindings. 展开更多
关键词 Adverse childhood experience character strength positive growth WELL-BEING depressive symptoms
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不同外源物质及喷施时期对滩涂水稻穗部性状、产量及品质的影响
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作者 张蛟 韩继军 +2 位作者 崔士友 陈澎军 缪源卿 《中国稻米》 北大核心 2024年第2期31-36,42,共7页
以南粳5055为供试品种,于2021年在江苏滩涂地区(土壤盐分1.11~1.26 g/kg)开展田间试验,研究不同外源物质及喷施时期(2次:分蘖期、孕穗期和3次:分蘖期、孕穗期、灌浆期)对滩涂水稻穗部性状及产量、品质的影响。试验设置7个处理,即喷施清... 以南粳5055为供试品种,于2021年在江苏滩涂地区(土壤盐分1.11~1.26 g/kg)开展田间试验,研究不同外源物质及喷施时期(2次:分蘖期、孕穗期和3次:分蘖期、孕穗期、灌浆期)对滩涂水稻穗部性状及产量、品质的影响。试验设置7个处理,即喷施清水(CK)、禾稼春喷施2次(L1-2)、碧护喷施2次(L2-2)、萘乙酸喷施2次(L3-2)、禾稼春喷施3次(L1-3)、碧护喷施3次(L2-3)和萘乙酸喷施3次(L3-3)。结果表明,喷施外源物质具有提高水稻产量的效果,与CK相比,L2-2、L2-3、L3-2和L3-3分别显著提高产量17.69%、17.80%、11.62%和13.42%,L1-2和L1-3则分别提高产量6.66%和7.09%,但差异不显著;喷施外源物质对稻米品质影响不大。喷施外源物质对水稻有效穗数和结实率均没有明显影响,但显著增加实粒数;L1-2、L2-2、L1-3和L3-3处理显著增加每穗粒数,L2-2和L2-3处理显著增加千粒重。喷施外源物质对水稻一次枝梗的枝梗数、总粒数、实粒数和结实率没有显著影响,而对二次枝梗的枝梗数、总粒数、实粒数及结实率均有不同程度的增加效果,且二次枝梗对每穗粒数的贡献率普遍提高。对同一种外源物质而言,喷施2次和喷施3次对水稻产量、穗部性状的影响没有显著差异。碧护喷施处理提高水稻产量主要是由每穗粒数、每穗实粒数和千粒重提高引起的,萘乙酸喷施处理提高水稻产量主要是每穗粒数、每穗实粒数提高引起的,而每穗粒数的提高主要与二次枝梗数及二次枝梗的总粒数和实粒数增加有关。因此,今后在滩涂地区种植水稻,可通过在分蘖期和孕穗期喷施外源叶面肥或植物生长调节剂来改善穗粒结构特别是二次枝梗性状,达到增产增收的目的。 展开更多
关键词 水稻 外源物质 植物生长调节剂 喷施时期 穗部性状 滩涂
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不同植物生长延缓剂对切花向日葵农艺性状的影响
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作者 刘明 梁均平 +1 位作者 张迪 何欢 《湖北农业科学》 2024年第7期83-86,91,共5页
以切花向日葵(Helianthus annuus L.)品种圣骑士为试验材料,使用80 mg/L多效唑、200 mg/L矮壮素、100 mg/L缩节胺、20 mg/L烯效唑和800 mg/L丁酰肼进行叶面喷施,以清水作为对照,在达到采收成熟度后,对不同处理条件下切花向日葵茎、叶、... 以切花向日葵(Helianthus annuus L.)品种圣骑士为试验材料,使用80 mg/L多效唑、200 mg/L矮壮素、100 mg/L缩节胺、20 mg/L烯效唑和800 mg/L丁酰肼进行叶面喷施,以清水作为对照,在达到采收成熟度后,对不同处理条件下切花向日葵茎、叶、花性状进行测定。结果表明,与CK相比,各处理在不同程度上降低了株高、重心、叶面积和叶柄长度,提高了茎干比、叶片厚度、叶绿素含量和花盘比重。80 mg/L多效唑处理的花盘直径增加13.4%,茎粗增加37.4%,20 mg/L烯效唑处理的花盘直径增加7.3%,茎粗增加17.3%,提升了切花品质。植物生长延缓剂可使切花向日葵植株高降低,重心下降,茎干比增大,叶柄缩短,叶片缩小增厚,叶绿素含量增加,切花品质提升,其中以多效唑和烯效唑处理综合效果较好。 展开更多
关键词 切花向日葵(Helianthus annuus L.) 植物生长延缓剂 农艺性状
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不同种源云南松幼苗性状的异速生长及变异分析
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作者 汪啟波 贺斌 +7 位作者 陆庄跃 杨振欣 郑超凡 王瑜 蔡年辉 许玉兰 金建华 王德新 《西南林业大学学报(自然科学)》 CAS 北大核心 2024年第2期52-59,共8页
为研究不同种源1~3年生云南松苗木苗高、地径生长变异以及异速生长指数,深入了解云南松苗期性状生长在种源间的变异特点与异速生长关系,对1~3年生的不同苗龄云南松苗木苗高、地径生长状况进行统计分析以及异速生长关系分析,比较了3个种... 为研究不同种源1~3年生云南松苗木苗高、地径生长变异以及异速生长指数,深入了解云南松苗期性状生长在种源间的变异特点与异速生长关系,对1~3年生的不同苗龄云南松苗木苗高、地径生长状况进行统计分析以及异速生长关系分析,比较了3个种源不同龄期云南松苗木性状的生长分化特点和异速生长指数。结果表明:不同苗龄云南松苗木苗高、地径生长在种源间存在极显著变异,性状的变异程度随苗龄的增长整体呈现减弱的趋势且性状间存在极显著的相关性。种源内苗高变异系数随苗龄的增长先增加后降低,整体波动范围为32%~50%,地径变异系数整体波动范围为33%~48%,随苗龄增长呈递减趋势,变异来源中种源内层次的因素随苗龄的增加而减弱。新平种源苗高生长的平均变异系数为46%,高于另外2个种源;不同种源不同苗龄云南松苗木间存在显著的异速生长现象,且异速生长指数是变化的。可见,苗高、地径都存在较为丰富的分化和变异,性状分化程度受时间影响明显。不同种源苗木的两个性状都以种源内变异为主,各种源苗木的变异程度不同,不同龄期苗木会根据自身生长状况调整生长策略以适应对资源的竞争。不同种源苗木异速生长关系在不同苗龄间存在极显著的差异,异速生长指数存在显著差异,随着苗龄的增加,各种源苗木苗高-地径异速生长关系模型从符合弹性自相似拟模型改变为几何相似性模型,符合小个体植株异速生长指数接近1的结果。异速生长指数随苗木生长而变化,受苗木自身遗传品质和对环境的适应能力等因素综合影响。 展开更多
关键词 云南松 种源 性状变异 异速生长
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一株海洋杆菌属新菌种XAAS-72^(T)的植物促生功能分析及ACC脱氨酶蛋白结构预测
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作者 王慧楠 朱静 +4 位作者 谢文文 何子璇 柏晓玉 朱艳蕾 张志东 《新疆农业科学》 CAS CSCD 北大核心 2024年第7期1778-1785,共8页
【目的】研究海洋杆菌属新菌种XAAS-72的植物促生功能,挖掘其潜在功能基因。【方法】通过对菌株全基因组测序,分析相关功能基因组成,挖掘ACC脱氨酶合成相关的候选基因,并进行功能预测。【结果】海洋杆菌属新种Pontibacter kalidii XAAS... 【目的】研究海洋杆菌属新菌种XAAS-72的植物促生功能,挖掘其潜在功能基因。【方法】通过对菌株全基因组测序,分析相关功能基因组成,挖掘ACC脱氨酶合成相关的候选基因,并进行功能预测。【结果】海洋杆菌属新种Pontibacter kalidii XAAS-72菌悬液处理可显著提高盆栽小麦麦苗生长,其基因组长度为5054860 bp,含1个环形质粒,总GC含量为54.52%,注释的基因数目为4391个,编码蛋白数4261个,具有多种抗逆和促生相关基因。其与Pontibacter sp.BAB1700的ACC脱氨酶(1-aminoeyclopropane-1-earboxylate-deaminase)相似度最高为72.48%。该蛋白属于不稳定亲水性蛋白,不具备跨膜结构,且无信号肽结构。【结论】海洋杆菌属新种XAAS-72蕴藏着丰富的抗逆和植物促生相关基因。 展开更多
关键词 海洋杆菌属 植物促生特性 ACC脱氨酶 结构预测
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不同小体型肉鸭品系生长性能、屠宰性能和肉品质比较
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作者 徐鸣鸿 张傲 +6 位作者 贾雯茜 庄重 王志秀 江勇 白皓 常国斌 陈国宏 《中国家禽》 北大核心 2024年第5期12-17,共6页
为比较“益扬1号”两个专门化品系(H1♂×H1♀、H2♂×H2♀)及其杂交后代(H1♂×H2♀)生长性能、屠宰性能和肉品质,试验采用1日龄“益扬1号”两个专门化品系及其杂交后代各110只进行地面平养,记录生长性能,7周龄进行屠宰与... 为比较“益扬1号”两个专门化品系(H1♂×H1♀、H2♂×H2♀)及其杂交后代(H1♂×H2♀)生长性能、屠宰性能和肉品质,试验采用1日龄“益扬1号”两个专门化品系及其杂交后代各110只进行地面平养,记录生长性能,7周龄进行屠宰与肉品质测定。结果显示:7周龄时,H1♂×H2♀组体重低于H1♂×H1♀组,高于H2♂×H2♀组(P<0.05)。H1♂×H2♀组除胸深外,各项体尺指标均显著高于H2♂×H2♀组(P<0.05)。H1♂×H2♀组的腿比率、瘦肉率、腿肌率和胸肌率显著高于H1♂×H1♀和H2♂×H2♀组(P<0.05),屠宰率、全净膛率和半净膛率显著低于H1♂×H1♀和H2♂×H2♀组(P<0.05)。H1♂×H2♀组胸肌肉色a*显著高于H1♂×H1♀和H2♂×H2♀组(P<0.05),腿肌肉色b*低于H1♂×H1♀和H2♂×H2♀组(P<0.05)。H1♂×H2♀组剪切力显著低于H1♂×H1♀组(P<0.05),水分含量显著低于H2♂×H2♀组(P<0.05)。H1♂×H2♀组胸肌蛋白质含量和腿肌脂肪含量显著高于H1♂×H1♀和H2♂×H2♀组(P<0.05)。研究表明,H1和H2纯系经过杂交,生长性能和肉品质等指标得到改善。 展开更多
关键词 优质肉鸭 生长性能 屠宰性状 肉品质
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颗粒生物绿肥对辣椒生长及土壤理化性质的影响
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作者 张睿桐 车宗贤 +5 位作者 古丽君 张久东 卢秉林 杨蕊菊 吴科生 包兴国 《国土与自然资源研究》 2024年第6期89-94,共6页
为研究颗粒生物绿肥对作物的促生以及对土壤的改良效果,以辣椒为指示作物,通过盆栽试验,分别研究不施肥(CK)、施用颗粒绿肥(G)、施用含胶冻样类芽孢杆菌的颗粒生物绿肥(GJ)、施用含长枝木霉的颗粒生物绿肥(GM)、施用含长枝木霉及胶冻样... 为研究颗粒生物绿肥对作物的促生以及对土壤的改良效果,以辣椒为指示作物,通过盆栽试验,分别研究不施肥(CK)、施用颗粒绿肥(G)、施用含胶冻样类芽孢杆菌的颗粒生物绿肥(GJ)、施用含长枝木霉的颗粒生物绿肥(GM)、施用含长枝木霉及胶冻样类芽孢杆菌的颗粒生物绿肥(GJM)对辣椒生长以及土壤理化性质的影响。结果表明,与单施颗粒绿肥相比,施用配方颗粒生物绿肥均可以促进作物生长,增加植株干重及其氮、磷、钾养分含量,提高土壤中有效养分含量,尤其是磷素的提升效果最为明显,G、GJ、GM、GJM处理分别提升6.91%、8.00%、25.46%、63.85%,且土壤容重显著降低,其中以施用含长枝木霉及胶冻样类芽孢杆菌的颗粒生物绿肥效果最佳,具体表现为:GJM处理的株高、茎粗及SPAD值较CK处理和G处理最高分别提高了106.74%、130.69%、24.07%和63.70%、45.20%、24.60%,且GJM处理的辣椒植株鲜、干重均为最大值,分别是32.88 g和8.25 g,土壤容重最低,为1.25 g·cm3,植株养分受到施肥的显著影响,GJM处理全氮、磷、钾含量较CK处理和G处理分别提高25.42%、30.77%、55.12%和17.00%、21.43%和14.39%。综上所述,含长枝木霉及胶冻样类芽孢杆菌的颗粒生物绿肥能够最有效的促进辣椒的生长、提升土壤的肥力。 展开更多
关键词 辣椒 颗粒生物绿肥 生长性状 养分
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东北地区不同间伐强度青山杨人工林生长及木材性状变异
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作者 徐晶 崔莹 +3 位作者 王福森 李开隆 曲冠证 赵曦阳 《植物研究》 CAS CSCD 北大核心 2024年第2期248-258,共11页
探究不同间伐强度对青山杨人工林生长及木材性状的影响,为东北地区培育杨树优质工业资源材提供理论基础。以18年生青山杨为试验材料,以初植株行距2 m×3 m为对照,设置3种强度的间伐处理(4 m×3 m、6 m×3 m、4 m×6 m)... 探究不同间伐强度对青山杨人工林生长及木材性状的影响,为东北地区培育杨树优质工业资源材提供理论基础。以18年生青山杨为试验材料,以初植株行距2 m×3 m为对照,设置3种强度的间伐处理(4 m×3 m、6 m×3 m、4 m×6 m)。间伐后第5年对试验林的生长性状(树高、胸径、2米径、冠幅)及木材性状(基本密度、纤维长、纤维宽、半纤维素含量、纤维素含量、综纤维素含量、木质素含量)进行了测定,并利用树高、胸径计算出单株材积及单位面积蓄积。方差分析结果表明,除基本密度外,各指标差异均达到极显著水平(P<0.01)。均值分析结果表明,林木各生长指标与木质素含量的均值在株行距为6 m×3 m时达到最大,其余各木材指标均在株行距为4 m×3 m或6 m×4 m时达到最大;各测定指标表型变异系数变化范围为3.35%~29.87%;除基本密度外,各指标重复力均超过0.590。相关性分析结果表明,各生长指标间均达显著正相关水平(0.690<r<0.993),而木材性状间及生长性状与木材性状间的相关性较弱。分别以生长性状、木材性状及联合生长与木材性状为评价指标对各处理进行综合评价后发现,Qi分别在株行距为6 m×3 m、4 m×6 m及4 m×6 m时达到最大。间伐能够促进林分生长,改良林木材性,且保留株行距为4 m×6 m时,林木材性及生长与木材综合改良效果较为优良;保留株行距为6 m×3 m时,林木生长效果最好。因此,今后可根据培育目标的不同选择适宜的间伐强度进行东北地区杨树优质工业资源材的培育。 展开更多
关键词 青山杨 间伐强度 生长性状 木材性状
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渝东南极端高温干旱对‘长林’系列油茶生长及果实性状的影响
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作者 曾清苹 晏巧 +7 位作者 李彬 李果 耿养会 吴念 陈安民 彭川 周飞 娄利华 《中国农学通报》 2024年第4期39-44,共6页
调查渝东南地区2022年夏季极端高温干旱复合因素对‘长林3号’、‘长林4号’、‘长林40号’及‘长林53号’油茶生长及果实性状的影响,以期为‘长林’系列油茶选育和推广提供理论依据。结果表明,高温干旱影响油茶植株生长,抑制茶果纵径... 调查渝东南地区2022年夏季极端高温干旱复合因素对‘长林3号’、‘长林4号’、‘长林40号’及‘长林53号’油茶生长及果实性状的影响,以期为‘长林’系列油茶选育和推广提供理论依据。结果表明,高温干旱影响油茶植株生长,抑制茶果纵径、横径生长,降低油茶鲜出籽率,减少单果质量和单株产果量。在高温、干旱双重逆境胁迫下,苗木和成林以‘长林53号’抗旱能力最强,果实经济性状(单果质量、纵径、横径、籽质量、鲜出籽率及单株鲜果产量)表现最好;幼林以‘长林3号’抗旱能力最强,果实茶籽数量最多。综上所述,‘长林53号’在极端高温干旱情况下,生长发育和性状表现较好,抵御高温干旱胁迫能力突出,建议作为该区域的优良品种进行培育、推广。 展开更多
关键词 极端高温干旱 ‘长林’系列 油茶 生长 果实性状
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红皮云杉人工林树冠特征与生长形质的关系及间伐与修枝对其影响
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作者 邢鸿林 赵彩鸿 +3 位作者 沈忱 杨蕾 沈海龙 杨玲 《西北林学院学报》 CSCD 北大核心 2024年第2期91-96,202,共7页
为了解红皮云杉(Picea koraiensis)人工林树冠特征与生长形质的关系,分析不同间伐与修枝组合对红皮云杉人工林树冠特征与生长形质影响规律,明确抚育管理措施强度,为红皮云杉大径材培育技术的建立提供参考依据。以黑龙江省佳木斯市孟家... 为了解红皮云杉(Picea koraiensis)人工林树冠特征与生长形质的关系,分析不同间伐与修枝组合对红皮云杉人工林树冠特征与生长形质影响规律,明确抚育管理措施强度,为红皮云杉大径材培育技术的建立提供参考依据。以黑龙江省佳木斯市孟家岗林场47 a红皮云杉人工中龄林木为研究对象,利用多目标一维比较法对林木生长形质进行综合评价,采用通径分析方法分析树冠特征与生长形质及综合评价值之间的关系,明确不同间伐与修枝组合对林木生长的影响。结果表明,冠幅、冠形率对树高、胸径、单株材积、活枝下高与生长形质综合指标具有显著正向作用,但冠长率对其具有显著负向作用(P<0.05);冠幅、冠形率对胸高形数具有显著负向作用,冠长率对其有显著正向作用(P<0.05);树冠特征因子对红皮云杉生长形质性状影响作用与重要性不尽相同,对生长形质综合指标的相对重要性由大到小顺序为冠幅、冠长率、冠形率。不同间伐与修枝组合对树冠特征、活枝下高、胸高形数、生长形质综合指标影响不显著(P>0.05);随着间伐强度的增加及修枝强度的降低,林木树高、胸径、单株材积增加,且具有显著差异(P<0.05)。因此,树冠形态特征因子对红皮云杉生长形质性状因子具有显著直接作用。培育红皮云杉大径材首先要有宽大的冠幅,其次要有狭长的冠形和较小的冠长率。高强度间伐低强度修枝(30%间伐,1/5树高修枝)的管理方式可促进红皮云杉中龄林树高、胸径的生长。 展开更多
关键词 红皮云杉 树冠特征 生长形质 间伐 修枝
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Effects of Light Intensity on Growth, Development and Formation on Fagopyrum cymosum 被引量:1
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作者 华劲松 戴红燕 《Agricultural Science & Technology》 CAS 2014年第3期363-366,共4页
Effects of light intensity on growth, development and formation on Fagopy- rum cymosum were explored with natural light intensities at 100%(A), 85.2%(B), 75.8%(C) and 59.7%(D). The results showed that the decl... Effects of light intensity on growth, development and formation on Fagopy- rum cymosum were explored with natural light intensities at 100%(A), 85.2%(B), 75.8%(C) and 59.7%(D). The results showed that the decline of light intensity re- duced nutrient growth period, so that plant growth stage entered in advance and extended, which indicated that the decline of light intensity would lower leaf number and area, the number of twigs from the stem, as well as photosynthate. Further- more, the reduction degree increased upon light intensity decrease degree, and the proper shading improved stem height and leaf area enhanced before growth term. 展开更多
关键词 Fagopyrum cymosum Light intensity growth and development Morpho- logical characters
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稻茬烤烟优化基肥和提苗肥对上部烟叶经济性状和品质的影响
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作者 李建华 安然 +3 位作者 江智敏 肖志鹏 旷子扬 邓小华 《天津农业科学》 CAS 2024年第4期18-23,共6页
为提高稻茬烤烟上部烟叶品质并改善其经济性状,以云烟87为试验材料,采用双因素试验,研究优化基肥(基肥中添加微生物菌剂)和优化提苗肥(提苗肥配施尿素)对烤烟经济性状、物理特性、化学成分、评吸质量的影响。结果表明:基肥添加微生物菌... 为提高稻茬烤烟上部烟叶品质并改善其经济性状,以云烟87为试验材料,采用双因素试验,研究优化基肥(基肥中添加微生物菌剂)和优化提苗肥(提苗肥配施尿素)对烤烟经济性状、物理特性、化学成分、评吸质量的影响。结果表明:基肥添加微生物菌剂可提高上部烟叶产量与产值;提苗肥配施尿素做可提高上部烟叶单叶质量、叶片厚度、叶面积质量和总糖含量;基肥添加微生物菌剂和提苗肥配施尿素处理较基肥不添加微生物菌剂和单施烟草专用提苗肥的上部烟叶经济性状指数提高了11.53%,评吸质量总分提高了16.14%,综合效果指数提高了9.64%。综合来看,在基肥中添加微生物菌剂,并在提苗肥中适量配施尿素,有利于提高上部烟叶产量、产值和烟叶品质。 展开更多
关键词 稻茬烤烟 早生快发 经济性状 烟叶品质 上部烟叶
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适宜甘肃金塔地区饲用燕麦品种筛选
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作者 郭天斗 潘玉鑫 +7 位作者 李世昆 吴宏涛 许发兴 李天银 马斌 张怀山 柴锦隆 陈本建 《中国饲料》 北大核心 2024年第7期133-139,共7页
为筛选出适宜于甘肃金塔地区种植的优良饲用燕麦品种,试验对7个燕麦品种的生长性能和营养品质进行测定,并通过主成分分析和隶属函数法综合评价不同燕麦品种的适应性。结果表明:除爱沃外,其他6个品种均在播种后90 d进入灌浆后期。不同品... 为筛选出适宜于甘肃金塔地区种植的优良饲用燕麦品种,试验对7个燕麦品种的生长性能和营养品质进行测定,并通过主成分分析和隶属函数法综合评价不同燕麦品种的适应性。结果表明:除爱沃外,其他6个品种均在播种后90 d进入灌浆后期。不同品种之间各评价指标存在明显差异,且各指标之间均存在不同程度的相关性,其中太阳神的株高最高,为139.87 cm;爱沃的茎粗与叶茎比最高,分别为5.51 mm、0.64;莫妮卡的分蘖数最多,为4.27个;燕王的干草产量最高、粗灰分最低,分别为8974.93 kg/hm2、9.33%DM;凯撒的粗蛋白质含量与相对饲喂价值最高,分别为13.59、118.11%DM,其中性洗涤纤维与酸性洗涤纤维最低,分别为50.91、31.14%DM。对7个燕麦品种的14个指标进行主成分分析可知,前4个主成分因子累计贡献率达94.75%,酸性洗涤纤维、分蘖数、株高、粗灰分可作为综合评价指标。通过综合评价可知,太阳神、燕王综合表现较好,可作为金塔地区的优良燕麦品种在生产中进行推广种植。 展开更多
关键词 燕麦 生长性状 营养品质 相关性分析 主成分分析 隶属函数法
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江苏淮南地区白麦品种筛选研究
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作者 倪杰 王金锁 +1 位作者 冯丹丹 万涛 《安徽农业科学》 CAS 2024年第2期19-23,共5页
白皮小麦是一种大穗型且出粉率高的小麦品种,在农业生产中逐渐受到农民的青睐,为了筛选出适宜江苏省地区大面积种植的白麦品种,通过选用常见的17种白麦,以淮麦33为对照品种,对田间表现、抗性及产量等进行了综合调查比较,以期筛选出综合... 白皮小麦是一种大穗型且出粉率高的小麦品种,在农业生产中逐渐受到农民的青睐,为了筛选出适宜江苏省地区大面积种植的白麦品种,通过选用常见的17种白麦,以淮麦33为对照品种,对田间表现、抗性及产量等进行了综合调查比较,以期筛选出综合表现良好及产量高的白麦品种。结果显示,白麦的全生育期在215~219 d,对照淮麦33的全生育期偏长,大部分品种的全生育期都低于对照;在田间表现方面(株型、落粒性、穗层整齐度及熟相等),淮麦系列(淮麦45、淮麦47、淮麦49、淮麦52)、宁麦系列(宁中麦1号、宁麦16164)、瑞华麦549和徐麦2023表现良好;从抗性方面来看,所有白麦品种的冻害程度在冬季都高于春季,大部分品种均未发生倒伏,所有品种在温度适宜及病虫害防治及时后均未发生病害;从产量方面来看,淮麦33产量排名为12处于中等偏下,淮麦系列(淮麦45、淮麦47、淮麦49、淮麦52)、宁麦(宁麦16164和宁中麦1号)、瑞华麦549和徐麦2023的产量明显高于对照品种,这主要与其有效穗和千粒重偏高有关。综上所述,综合考虑到田间性状、抗性及产量等方面,筛选出宁麦16164、淮麦45、淮麦47、徐麦2023、淮麦52、瑞华麦549、宁中麦1号、淮麦49这8个品种明显优于对照,可在该地区推广种植。 展开更多
关键词 白皮小麦 生育期 性状 抗性 产量结构
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