摘要
为了探讨外源性粗灰分对牦牛冷季采食量和消化率测定值的影响,对不同物候期牧草和不同季节牦牛粪中的粗灰分及粪中内源性指示剂(SiO_2、ADA和ADL)进行了测定。三个试验结果表明,青藏高寒草地牧草中粗灰分含量7～8月份最高,随后开始下降;牦牛粪中的粗灰分冷季明显高於暖季(P<0.01),并与SiO_2含量密切相关(冷季:r=0.9691,暖季:r=0.9008);冷季SiO_2和酸性洗涤粗灰(ADA)的回收率(RR)分别为161.1%和98.0%(以木质素为100%);模拟牦牛采食手抓采集牧草样品中的粗灰分、SiO_2、ADA和ADL都高於刈割草样。
Ash and internal markers were measured to verify the effect of them on the value of herbag intake and digestibility of yak in cold season. The content of ash in the hebage in Qingzang alpine grabsland peaked from July to August,and it in yak feces was higher in cold season than in warn season(P<0.01)and was related closely with silica content (r=0.9691 and r=0.9008 for cold and warm season). The recovery rate of ADA (Acid-detergent Ash)and silica were 98.04 and 161.1%, respectively. The sample of manual collection contented more silica, ADA and ADI, (Acid—detergent Lignin) than cutted sample.
出处
《中国牦牛》
1994年第2期26-28,36,共4页
基金
国家"八五"科技攻关项目85-11-03-03研究内容
关键词
牦牛
粗灰分
采食量
消化率
冷季
Exotic Ash, Marker Recovery Rate, Herbaye Intake, Digestibility
