摘要
采用尼龙袋法评定了云南黄牛对6种牧草的DM、CP、NDF和ADF有效降解率,并对牧草降解模型中的参数和有效降解率与牧草中营养成分的相关性进行了分析。试验结果显示:6种牧草DM的有效降解率为苜蓿干草粉最高,和1年生黑麦草粉差异不显著(P>0.05),和依次降低的苜蓿草块、光叶紫花苕粉、大麦秸粉、非洲狗尾草粉间差异极显著(P<0.01);6种牧草CP的有效降解率为苜蓿干草粉最高,和依次降低的苜蓿草块、1年生黑麦草粉、光叶紫花苕粉、大麦秸粉、非洲狗尾草粉间差异极显著(P<0.01);6种牧草NDF和ADF的有效降解率为苜蓿干草粉最高,和苜蓿草块差异不显著(P>0.05),和依次降低的1年生黑麦草粉、光叶紫花苕粉、大麦秸粉、非洲狗尾草粉间差异极显著(P<0.01)。综合测定的各个营养指标分析,云南黄牛对不同牧草的利用率大小为:苜蓿干草>苜蓿草块≈1年生黑麦草>光叶紫花苕>大麦秸>非洲狗尾草。牧草降解模型中的参数和有效降解率均与牧草营养成分中的CP含量呈较强的正相关,而与NDF和ADF含量呈较强的负相关。
Nylon-bag technique was used to evaluate the disappearance rate and effective degradability of DM, OM, CP, NDF and ADF in six forages, meanwhile, the correlations were analyzed between degradation model parameters, effective degradability and forage nutrients. The results showed that： DM effective degradability of alfalfa powder was the highest in six forages , and there was no significant difference between annual ryegrass powder and alfalfa powder（P0.05）, but there were significant difference between alfalfa powder and in turn reduced alfalfa block, vicia atropurpurea, barley straw power, and setaria powder（P0.01）; CP effective degradability of alfalfa powder was the highest in six forages , and there were significant difference between alfalfa powder and in turn reduced alfalfa block, annual ryegrass powder, vicia atropurpurea, barley straw power, and setaria powder（P0.01）; Effective degradabilities of NDF and ADF of alfalfa powder was the highest in six forages , and there was no significant difference between alfalfa block and alfalfa powder（P0.05）, but there were significant difference between alfalfa powder and in turn reduced annual ryegrass powder, vicia atropurpurea, barley straw power, and setaria powder（P0.01）. Comprehensive determination of all the nutrition index, the nutritional value of six forages to Yunnan yellow cattle were： alfalfa powder alfalfa block ≈ annual ryegrass powder vicia atropurpurea barley straw power setaria powder. The parameters and effective degradability of forages degradation model had strong positive correlation with forage nutrient CP content, but had strong negative correlation with NDF and ADF contents.
出处
《中国农学通报》
CSCD
北大核心
2011年第1期398-402,共5页
Chinese Agricultural Science Bulletin
基金
云南省重大科技攻关项目(2004NG04)
云南省科技强省创新项目(2008LA008)
科技部科技人员服务企业项目(2009GJF30034)
关键词
云南黄牛
牧草
降解规律
Yunnan yellow cattle
forages
degradabilities
