中国草地学报2026，Vol.48Issue(4)：107-114,8.DOI:10.16742/j.zgcdxb.20250235
营养元素对禾本科牧草体外消化率影响的相对重要性分析
Analysis of the Relative Importance of Nutrient Elements on the In vitro Digestibility of Gramineous Forages
摘要
Abstract
Forage serves as the primary component of ruminant diets,and its digestibility directly deter-mines the level of nutritional intake and production performance of animals,there by influencing the eco-nomic efficiency of livestock operations and the efficiency of resource utilization.To evaluate the relative importance of nutrients affecting forage digestibility,this study focused on eight typical grass species from the Hulunbuir Grassland in Inner Mongolia.A combination of statistical methods,including stepwise regression analysis,variance decomposition,principal component analysis,and dominance analysis,was employed to systematically compares the relative importance of macronutrients such as phosphorus(P),potassium(K),calcium(Ca),carbon(C),nitrogen(N),and sodium(Na),as well as micronutrients includ-ing iron(Fe),manganese(Mn),iodine(I),and selenium(Se)in influencing the digestibility of grass forage.The results showed that the variance contributions of macronutrients,micronutrients,and their interactions to the variation in gramineous forage digestibility were 36.61%,22.38%,and 39.62%,respectively,indicating that both nutrient categories and their interactive effects significantly influence digestibility,with macronutrients contributing slightly more than micronutrients.Among macronutrients,the relative impor-tance of individual elements on forage digestibility ranked as Ca>C>K>N>Na>P,with Ca and C play-ing particularly prominent roles.Among micronutrients,the relative importance followed the order of Mn>I>Se>Fe,with Mn exhibiting the strongest explanatory power.关键词
牧草消化率/方差分解/逐步回归/优势分析Key words
Forage digestibility/Variance decomposition/Stepwise regression/Dominance analysis分类
农业科技引用本文复制引用
张军,侯美如,董司琪,李江文,韩国栋,李治国..营养元素对禾本科牧草体外消化率影响的相对重要性分析[J].中国草地学报,2026,48(4):107-114,8.基金项目
内蒙古自治区自然科学基金项目(2025LHMS03053) （2025LHMS03053）
内蒙古农业大学一流学科科研专项(YLXKZX-NND-029) （YLXKZX-NND-029）
国家自然科学基金项目(32160332) （32160332）
内蒙古农业大学学科交叉基金项目(BR231502) （BR231502）
