Effects of locations and growth stages on nutritive value and silage fermentation quality of Leymus chinensis in Eurasian steppe of northern China

作者：Yanlin Xue, Chunsheng Bai, Juanjuan Sun, Lin Sun, Shujuan Chang, Qizhong Sun, Zhu Yu, Guomei Yin, He‐Ping Zhao, Haijun Ding · 发表于：Grassland Science · 年份：2017 · DOI：10.1111/grs.12177 · 被引用次数：30 · 研究领域：Animal Nutrition and Physiology、Moringa oleifera research and applications、Probiotics and Fermented Foods

Abstract The objective of the study was to determine the correlation among location of sampling sites, characteristics of Leymus chinensis material and fermentation quality, to examine the effect of growth stage on nutrient composition and fermentation quality, and then to find the main factors for influencing fermentation quality and the optimum harvest stage for ensiling. L. chinensis was harvested from 27 sites in Eurasian steppe of northern China, chopped, ensiled in plastic film bags, and stored in dark for 60 days. Lactic acid bacteria ( LAB ), fermentation characteristics and nutrient composition were analyzed. The results showed that crude protein ( CP ) of L. chinensis was >80 g kg –1 , and average of neutral detergent fiber and buffering capacity (BC) were 661 g kg –1 and 227 mE kg –1 respectively. The LAB number of silage was <10 8 , the pH >4.50, and the average of lactic acid ( LA ) and acetic acid ( AA ) were 5.14 and 9.72 g kg –1 respectively; and V‐Score >80. The water‐soluble carbohydrate ( WSC ) of L. chinensis correlated negatively with latitude ( P < 0.001) and positively with elevation ( P < 0.01) of sits based on dry matter ( DM ) and fresh weight ( FW ), and CP correlated negatively with latitude ( P < 0.05) based on FW . The latitude and elevation of sites correlated significantly ( P < 0.05) with LA , LA / AA and ammonia nitrogen/total nitrogen ( AN / TN ) in L. chinensis silage, and the DM and hemicellulose of material had sig...