检索结果-南通市图书馆

Niacin alters the ruminal microbial composition of cattle under high-concentrate condition

animal Nutrition 2017年第2期3卷 180-185页

作者： Dan Luo Yufei Gao Youyou Lu Mingren Qu Xiaowen Xiong Lanjiao Xu Xianghui Zhao Ke Pan Kehui Ouyang Jiangxi Provincial Key Laboratory of animal Nutrition Jiangxi Agricultural University animal husbandry bureau of Jinxian county

To understand the effects of niacin on the ruminal microbial ecology of cattle under high-concentrate diet condition, Illumina MiSeq sequencing technology was used. Three cattle with rumen cannula were used in a 3 x 3 Latin-square design trial. Three diets were fed to these cattle during 3 periods for 3 days, respectively: high-forage diet(HF; forage-to-concentrate ratio = 80:20), high-concentrate diet(HC;forage-to-concentrate ratio=20:80), and HC supplemented with 800 mg/kg niacin(HCN). Ruminal pH was measured before feeding and every 2 h after initiating feeding. Ruminal fluid was sampled at the end of each period for microbial DNA extraction. Overall, our findings revealed that subacute ruminal acidosis(SARA) was induced and the a-diversity of ruminal bacterial community decreased in the cattle of HC group. Adding niacin in HC could relieve the symptoms of SARA in the cattle but the ruminal pH value and the Shannon index of ruminal bacterial community of HCN group were still lower than those of HF group. Whatever the diet was, the ruminal bacterial community of cattle was dominated by Bacteroidetes,Firmicutes and Proteobacteria. High-concentrate diet significantly increased the abundance of Prevotella,and decreased the abundance of Paraprevotella, Sporobacter, Ruminococcus and Treponema than *** with HC, HCN had a trend to decrease the percentage of Prevotella, and to increase the abundance of Succiniclasticum, Acetivibrio and Treponema. Increasing concentrate ratio could decrease ruminal pH value, and change the ruminal microbial composition. Adding niacin in HC could increase the ruminal pH value, alter the ruminal microbial composition.

关键词： Ruminal microbial ecology α-diversity Niacin High-concentrate diet condition Cattle

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Closing the nitrogen use efficiency gap and reducing the environmental impact of wheat-maize cropping on smallholder farms in the Guanzhong Plain,Northwest China

引用

Journal of Integrative Agriculture 2019年第1期18卷 169-178页

作者： Lü Feng-lian HOU Miao-miao ZHANG Hong-tao Asif Khan Muhammad Ayaz QIANGJIU Ciren HU Chang-lu YANG Xue-yun SUN Ben-hua ZHANG Shu-lan College of Natural Resources and Environment Northwest A&F University/Key Laboratory of Plant Nutrition and the Agro-environment in Northwest ChinaMinistry of Agriculture Agriculture and husbandry bureau of Cuona county Agriculture and Husbandry Bureau of Cuona County

A high crop yield with the minimum possible cost to the environment is generally ***,the complicated relationships among crop production,nitrogen(N) use efficiency and environmental impacts must be clearly *** conducted a series of on-farm N application rate experiments to establish the linkage between crop yield and N_2 O emissions in the Guanzhong Plain in Northwest *** also examined crop yield,partial factor productivity of applied N(PFPN) and reactive N(Nr) losses through a survey of 1 529 and 1 497 smallholder farms that grow wheat and maize,respectively,in the *** optimum N rates were 175 and 214 kg ha^(-1) for winter wheat and summer maize,respectively,thereby achieving the yields of 6 799 and 7 518 kg ha^(-1),correspondingly,with low N_2 O emissions based on on-farm N rate *** the smallholder farms,the average N application rates were 215 and 294 kg ha^(-1) season^(-1),thus producing 6 490 and 6 220 kg ha^(-1) of wheat and maize,*** corresponding PFPN values for the two crops were 36.8 and 21.2 kg N kg^(-1),and the total N_2 O emissions were 1.50 and 3.88 kg ha^(-1),*** N balance,large Nr losses and elevated N_2 O emissions could be explained by the overdoses of N application and low grain yields under the current farming *** crop yields,N application rates,PFPN and total N_2 O for wheat and maize were 18 and 24% higher,42 and 37% less,75 and 116% higher,and 42 and 47% less,correspondingly,in the high-yield and high-PFPN group than in the average smallholder *** conclusion,closing the PFPN gap between the current average and the value for the high-yield and high-PFPN group would increase crop production and reduce Nr losses or the total N_2 O emissions for the investigated cropping system in Northwest China.

关键词： N fertiliser grain yield PFPN N balance reactive nitrogen losses N2O emission

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Selection Progress of Wannan Native Chicken's Fast and Slow Feathering Lines

引用

animal husbandry and Feed Science 2013年第3期5卷 112-114页

作者： CHEN Xing-yong GENG Zhao-yu NIU Juan-juan SUN Jian-wu LIU Ping College of animal Science and Technology Anhui Agricultural University animal husbandry bureau of qingyang county

[Objective]This experiment aimed to establish fast and slow feathering lines from purified and rejuvenated core breeding flock. [Method] Individual and family selection were used for continuous selection from zero to the second generation. [Result]The results showed that in the fast feathering line,the average weight gain was improved by 108. 34 g per generation in roosters at the age of 20 weeks while a 54. 5 g increase was got per generation in hens. Hen housed egg production was increased from 150 to 170 at the age of 66 weeks,and the healthy rate of chicken flock was raised by 0. 7 percent. In the slow feathering line,the average weight gain was increased by 156. 6g per generation in roosters while a 38. 9 g increase was got per generation in hens,and the hen housed egg production was increased from 158 to 179 at the age of 66 weeks. [Conclusion] This research had a great significance in increasing native chicken＇s production performance and developing its market competitiveness.

关键词： Wannan native chicken Fast and slow feathering lines selection

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Growth Development and Reproductive Performance of Congjiang Fragrance Pig

引用

animal husbandry and Feed Science 2014年第5期6卷 269-270,275页

作者： Shen Xuelin Duan Yongbang Yang Xiujiang Wei Shengquan Kaili Municipal animal husbandry and Veterinary Administration Office animal husbandry bureau of Congjiang county

[Objective] The paper was to determine whether the germplasm resources of Congjiang fragrance pig had changed over the past 30 years. [Method]The growth development and reproductive performance of 100 pigs from six towns in central fragrance pig producing area and Congjiang fragrance pig stock seed farm were measured,and further compared with the data in Guizhou Livestock and Poultry Breeds 1986. [Result]The growth and development status was basically consistent,and the average litter size was at a downward trend: the first litter decreased by 26. 2%; the second litter decreased by 7. 0%; the third litter decreased by8. 55%. [Conclusion] The study laid the foundation for vigorous promotion of Congjiang fragrance pig in industrial development process,acceleration of breeding pace,gradual updating of farming breeds by farmers and improvement of production efficiency of fragrance pig.

关键词： Congjiang fragrance pig Growth development Reproductive performance Measurement

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Quantitative and Qualitative Body Traits of Longling Yellow Goats in China

引用

Agricultural Sciences in China 2010年第3期9卷 408-415页

作者： LENG Jing ZHU Ren-jun ZHAO Guo-rong YANG Qing-ran MAO Hua-ming Yunnan Provincial Key Laboratory of animal and Feed Science Yunnan Agricultural University Kunming 650201 P.R.China Faculty of Food Science and Technology Yunnan Agricultural University Kunming 650201 P.R.China animal husbandry bureau of Longling county Longling 678300 P.R.China

Quantitative, qualitative and phenotypic body measurements were determined on Longling Yellow goats in Longling of Yunnan Province in China. Body weight was determined at birth and then at 3, 6, 9, 12, 18, 24, 36, and 48 mon of age. Body measurements traits including height at wither （HW）, body length （BL）, heart girth （HG）, chest depth （CD）, and circumference of cannon bone （CCB） were determined at 3, 6, 9, 12, 18, 24, 36, and 48 mon of age. Phenotypic traits including coat colour, horns type, tip horn torsion, nose type, hair on forehead, wattles, ear lobes, black back line, hair on legs, and black hair on belly were determined at 12, 18, 24, 36, and 48 mon of age. Males were heavier （P〈0.01 or P〈0.05） than females; and except for chest depth at 24 mon of age （P 〉 0.05）, all other body measurements were also higher （P 〈 0.01 or P 〈 0.05） in males. HW, BL, CD, HG, and BW increased （P 〈 0.01） with age, except for 48 mon of females （P 〉 0.05）; while CCB did not always increase with age. HG had the highest correlation （P〈0.01） with body weights of both sexes. No differences were observed between the two sexes in the colour of the coat, horn type, tip horn torsion, nose type, ear lobes, black back line, and black hair on belly. However, differences exist between the two sexes in the presence of hair on forehead, wattles and long hair on legs. The female goats absence of tip horn torsion had positive effect on all variables measured at 36 and 48 mort of age （P〈0.01 or P〈0.05）. The presence of wattles was associated with heavier body weights from 18 mort （P〈0.01） of age onward, and also with longer HW, BL and CD （P〈0.01 or P〈0.05） in female goats. Female goats with ear lobes had heavier body weights at 12, 36 and 48 mon （P〈0.01） and longer CCB at 12 and 24 mon of ages （P〈0.05）. Hair on legs and black hair on belly only had partly effect body measurements on 12 mon of Longling Yellow female goats. Results of this study provide valuable information that will assist breeder

关键词： Longling Yellow goats body weight body measurements phenotypic characteristics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Temporal Distribution of Fish Community Structure in Dongting Lake Estuary

引用

Agricultural Sciences 2019年第3期10卷 294-301页

作者： Xiping Yuan Xin Yang Hongzi Ge Hong Li Daqing Deng Hunan Fisheries Institute Changsha China Xinshao county animal husbandry and Fisheries bureau Shaoyang China

The Dongting Lake Estuary is migration pathways for some river-lake migratory and semi-migratory fishes. In the present study, an annual survey of fish was conducted from January to November 2018 covering a total of 6 sites in Dongting Lake Estuary. A total of 57 freshwater species and subspecies belonging to 5 orders and 10 families were recorded. The catches at the Dongting Lake Estuary were mainly composed of Lake settled fish. The biomass of Cyprinus (Cyprinus) carpio Linnaeus was the highest, accounting for 25.53% of the total catches, followed by Hypophthalmichthys molitrixs, Culter alburnus Basilewsky and Ctenopharyngodon idellus, accounting for 10.41%, 8.99% and 7.10% of the total catches, respectively. The four major domestic carps accounted for 26.13% of the total catch. The range of richness of species varied between 40 and 51 species. The trend was fewer species in spring, with the arrival of summer and autumn gradually increasing, peaking at the turn of summer and autumn, and then gradually decreasing with the arrival of winter, to the lowest in spring. The Shannon, Simpson, Pielou and Margalef indices showed the consistent trends with richness of species.

关键词： Biodiversity Dongting Lake Estuary Freshwater Fish

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Isolation and Identification of Different Sources of Salmonella and Comparisons on the Drug Resistance Spectrum Types

引用

animal husbandry and Feed Science 2013年第2期5卷 65-67,72页

作者： CHEN Chao-xi XI Ge-ji TANG Cheng College of Life Science and Technology Southwest University for Nationalities animal husbandry and Veterinary bureau of Heishui county

[ Objective] In order to make out differences between drug resistance spectrum types of different animal sources of Salmonella. [ Meth- otis] Selenite cystine broth, Salmonella- Shigella genus agar medium, CHROMagar Salmonella chromogenic culture, Reveal Salmonella detection kit and molecular biology methods were used for isolation and identification of Salmonella from different animal feces samples. Antibacterialantimi- crobial susceptibility tests of 17 kinds of drugs such as enrofloxacin, apramycin and florfenicol were done on isolated strains with broth microdilution method, and test data was analysed with WHOnet 5.4 software. [ Results ] 699 feces samples from different animals were separated, and 53 strains of Salmonella were achieved with separation rate of 7.58%, among which those of yak, poultry, and pet sources were respectively 4.33%, 9.06% and 8.37%. [ Condusions] Separation rates and drug resistance spectrum types of different animal origin Salmonella varied greatly, among which separation rates and drug resistance spectrum types of yak source Salmonella were the lowest, there was little difference between separation rates of poultry and dog source Salmonella, however there were large differences on drug resistance spectrum types.

关键词： Salmonella Isolation and identification Drug resistance spectrum type

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Studies on Antibacterial Effect of Berberis julianae Schneid and Cinnamomum camphora( L.) Presl. to Avian Escherichia coli and Salmonella

引用

animal husbandry and Feed Science 2013年第3期5卷 105-107页

作者： XI Ge-ji MOU Ya CHEN Chao-xi College of Life Science and Technology Southwest University for Nationalities animal husbandry and Veterinary bureau of Heishui county

[Objective]This study aimed to observe the antibacterial activity of Berberis julianae Schneid and Cinnamomum camphora（ L.） Presl. aqueous extracts and their antibiotical effect when being used with commonly used antibiotics in- vitro. [Method] Broth microdilution method and checkerboard dilution method were used and the reference strain E. coli ATCC25922 and clinical sample separation strains of E. coli and Salmonella were selected to determine the minimum inhibitory concentration（ MIC） and fractional inhibitory concentration（ FIC）. [Result] The MICs of Berberis julianae Schneid and Cinnamomum camphora（ L.） Presl. for E. coli and Salmonella were both 1 mg /mL,and that of other antibiotics for the two strains were in the quality control range provided by NCCLS. [Conclusion] The synergistic effect or additive effect were observed when they were applied with the commonly used antibiotics.

关键词： Berberis julianae Schneid Cinnamomum camphora(L.) Presl. Minimum inhibitory concentration(MIC) Fractional inhibitory concentration(FIC).

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Development Status and Strategies of Xieka Cattle

引用

Asian Agricultural Research 2022年第4期14卷 46-48,61页

作者： Yi SHI Donghui FANG Fang HE Fuqiu WU Jia GAN Yueda AGUO Xiaodong DENG Jun YI Maozhong FU Qi CAO Wei WANG Sichuan animal husbandry Research Institute Chengdu 610066 China Jiulong county bureau of Agriculture Animal Husbandry Rural Areas and Science and Technology Jiulong 616200 China

In this paper,the present situation of Xieka cattle was investigated,and the body size of Xieka cattle was *** was found that there were some problems in Xieka cattle,such as backward feeding and management,and degradation of *** corresponding strategies were put forward in order to promote the resource protection,development and utilization of Xieka cattle.

关键词： Xieka cattle Development status Strategies

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of Immunization Against Inhibin on Egg-Laying Performance in Magang and Landaise Geese

引用

Agricultural Sciences in China 2007年第3期6卷 355-360页

作者： HUANG Yun-mao LI Min-yi SHI Zhen-dan BAN Jin QIN Yi-ping College of Life Science Zhongkai University of Agriculture and Technology Guangzhou 510225 P.R.China Department of animal Science South China Agricultural University Guangzhou 510642 P.R.China bureau of animal husbandry of Tiane county Guangxi Zhuang Autonomous Region Tiane 547300 P.R.China

This study aimed to improve egg-laying performance in incubating Magang geese of Guangdong origin and Landaise geese of French origin. In experiment 1, 50 adults, egg-laying Magang geese were inoculated intramuscularly （i.m.） on days 0, 22, and 45 with 1 mL of immunogen containing 1 mg of recombinant chicken inhibin fusion protein. Immunization significantly increased blood antibody titers against inhibin fusion protein, but did not affect the egg-laying performance within 10 days after the first inoculation. From day 15, the egg-laying rate in inhibin-immunized group increased and was significantly higher than the values of control geese from day 40 to 55. However, the reverse was true from day 55 to 75 when more immunized geese developed incubation. In the entire 120 days of the experiment, the immunized geese laid 17.3 eggs in contrast to 16.4 eggs laid by the control geese. From day 30 till the end of the experiment, weight of eggs in the control geese was significantly greater than that in inhibin-immunized birds. In experiment 2, 40 Landaise geese were immunized against inhibin, as described in experiment 1. These geese laid 9.0 eggs on average in contrast to 7.3 eggs laid by nonimmunized control geese over 90 days of egg laying. The above results demonstrated that immunization against recombinant chicken inhibin fusion protein improved egg-laying performance in geese, and the increment was higher in nonincubating geese.

关键词： immunization inhibin egg-laying performance geese

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：