【摘 要】
：
The application of n-alkane as markers to estimate herbage intake, apparent digestibility and species composition of diet consumed by grazing sheep was studied.
【机 构】
：
Institute of Animal Nutrition and Feed,Inner Mongolia Prataculture Research Center,College of Animal
论文部分内容阅读
The application of n-alkane as markers to estimate herbage intake, apparent digestibility and species composition of diet consumed by grazing sheep was studied. Six local Mongolian sheep were used to determine dry matter (DM) intake, apparent DM digestibility and species composition of diet during summer, autumn and winter. Animals were orally dosed twice daily with n-alkane gelatin capsules containing 60 mg C32-alkane as an external marker. Diet composition was estimated by comparing the odd-chain n-alkanes pattern profile (C27-C31) of the consumed plant species with the n-alkanes fecal concentrations of grazing animals, using a non-negative least squares algorithm called EATWHAT software package. The alkane pair C32:C33 and C33 alkane were used to estimate DM intake and diet apparent DM digestibility, respectively. The results showed that daily dry matter intake of the sheep were 1.77, 1.61 and 1.18 kg d-1 in summer, autumn and winter, respectively. Apparent DM digestibility, crude protein (CP), metabolizable energy (ME) and neutral detergent ifber (NDF) intake of diet consumed by sheep decreased signiifcantly (P
其他文献
人工湿地在农村生活污水治理中发挥着越来越重要的作用。本文从农村污水排放及治理的现状出发，总结了农村生活污水的特点，分析了人工湿地污水处理技术的必要性及可行性，并结合农
桂林市城区地处岩溶地区，地下水防污能力差，本文基于"广西壮族自治区地下水污染现状调查项目"成果资料，对桂林市城区地下水水源地水质及污染情况进行分析评价，并提出了防治对策。
当前城市就像一只巨大的猛兽，每天都在吞噬巨量的水资源，每天也会排泄巨量的污水。污水处理对于城市意义重大，如果没有环境工程对污水的处理，城市在几天之内就会变得污秽不堪无法
信息产业是我国第一大支柱产业，它带动着产业结构的优化和科技水平的提升。当前，福建省的信息产业发展存在着诸多弊端，但台湾则是全球电子信息产业最发达的地区之一，大陆与台湾产
目的：研究热休克蛋白(heat shock protein 90,Hsp90)抑制剂17-AAG对缺氧诱导的视网膜色素上皮( retinal pigment epithelial,RPE)细胞整联蛋白连接激酶( integrin - linked ki
本文从农机管理工作的现状、农机管理中存在的问题，以及农机安全管理的相关建议这三个方面对农用机械的管理进行阐述。
在负温条件下基坑开控及砼强度使用外加剂并试验引气剂在氯盐的掺入中含气量损失值，并经过5℃-12℃条件下施工考验。
Water deifcit is one of the most important causes of decreased yield in cultivated plants. Non-foliar green organs in cotton play an important role in yield for
In order to enhance the nitrogen removal, a subsurface wastewater inifltration system (SWIS) was improved by adding peat in deep soil as carbon source for denit
Low light stress is one of the most important factors affecting photosynthesis and growth in winter production of cucumber (Cucumis sativus L.) in solar greenho