草业学报2018，Vol.27Issue(5)：201-209,9.DOI:10.11686/cyxb2017247
尼龙袋法评定苜蓿和谷草的组合效应评估
Evaluating the associate effect of alfalfa hay and millet stalks with Nylon-bag technique
摘要
Abstract
This study aimed to investigate the optimal proportion of millet stalks in a mixed diet of millet stalks and alfalfa hay.Five small-tailed Han sheep with permanent rumen fistulae were selected as experimental animals and a 5 × 5 Latin square design was set up with five individual sheep as replicates to test each of five dietary mixtures.All five diets were composed of a 40 ∶ 60 mixture of concentrate and roughage.However,the roughage varied in the proportion of millet stalks and alfalfa hay (0 ∶ 100,100 ∶ 0,25 ∶ 75,50 ∶ 50,75 ∶ 25,for diets Ⅰ,Ⅱ,Ⅲl,Ⅳ,and Ⅴ,respectively).The digestibility and effective degradability (ED) of major nutrition composition in diets were measured using Nylon-bag technique.EDDM and EDCP were used as the primary assessment index to calculate an associate effects index (AEI);EDNDF and EDADF were used as a secondary index to reveal the mechanism of the associative effect between millet stalks and alfalfa hay,,It was found that:1) The ED of DM,CP,NDF and ADF was significantly increased with increasing proportion of alfalfa hay (P＜ =0.05).2) The AEI of groups Ⅲ,Ⅳ,and Ⅴ was 0.8％,4.0％ and 3.7％,respectively,when the EDDM was the only evaluation index,while the AEI of groups Ⅲ,Ⅳ,and Ⅴ,was 2.5％,3.5％ and 3.1％,respectively,when the EDcP was the only evaluation index.Thus,diet Ⅳ was the best.3) In diets Ⅲ,Ⅳ,and Ⅴ the respective contributions of CF to the AEIDM were 101.55％,68.75％ and 55.41％.关键词
苜蓿/谷草/尼龙袋法/有效降解率/组合效应Key words
alfalfa hay/millet stalks/Nylon-bag technique/effective degradability/associate effects引用本文复制引用
庄二林,王慧娟,田秀娥,万美娇,张阳,王永军..尼龙袋法评定苜蓿和谷草的组合效应评估[J].草业学报,2018,27(5):201-209,9.基金项目
科技部公益性行业专项“北方作物秸秆饲用化利用技术研究与示范”(201503134)资助. （201503134）
