动物营养学报2019，Vol.31Issue(8)：3853-3862,10.DOI:10.3969/j.issn.1006⁃267x.2019.08.047
玉米秸秆青贮、羊草、燕麦草与精饲料组合效应的研究
Combined Effect of Corn Straw Silage, Chinese Wildrye, Oat Grass and Concentrate
摘要
Abstract
The purpose of this experiment was to explore the optimal combined effect between mixed roughage ( corn straw silage+Chinese wildrye+oat grass) and concentrate by in vitro gas production method. The single factor experiment design was used to screen the combined effect, the corn straw silage ∶Chinese wildrye∶oat grass was 20∶30∶50, and the mixed roughage was combined with a concentrate at 100∶0, 80∶20, 60∶40, 50∶50, 40∶60, 20∶80 and 0∶100, respectively, and each combination was repeated three times. In vitro gas pro?duction method was used to analyze the cumulative gas production and the changes of pH, dry matter degrada?tion ( DMD) and microprotein ( MCP) , ammoniacal nitrogen ( NH3?N) and volatile fatty acids ( VFA) con?tents in different combinations. The single combination effect index ( SFAEI) and multiple combination effect index ( MFAEI) were calculated. The results showed as follows: 1 ) different combination ratios of mixed roughage to concentrate had significant effects on gas production ( P＜0.05) , and the single combination effect index of gas production at 4 h was the largest in 80∶20 group. 2) Different combination ratios of mixed rough?age to concentrate had significant effect on pH ( P＜0.05) , and the 0∶100 group had the lowest effect. 3) Dif?ferent combination ratios of mixed roughage to concentrate had significant effects on DMD ( P＜0.05) , and the single combination effect index of DMD was the highest in 20∶80 group. 4) The content of NH3?N was signifi?cantly affected by different combination ratios of mixed roughage to concentrate ( P＜0.05 ) , and the single combination effect index of NH3?N content was the highest in 50∶50 group. 5) Different combination ratios of mixed roughage to concentrate had significant effect on MCP content ( P＜0.05) , and the highest single combi?nation effect index of MCP content appeared in 50∶50 group. 6) The effects of different combination ratios of mixed roughage to concentrate on acetic acid, propionic acid and butyric acid contents were significant ( P＜0.05 ). According to multiple combination effect index, the optimal combination ratio of corn straw silage∶Chi?nese wildrye∶oat grass: concentrate is 10∶15∶25∶50.[ Chinese Journal of Animal Nutrition, 2019, 31( 8) :3853?3862]关键词
玉米秸秆青贮/羊草/燕麦草/精饲料/组合效应Key words
corn straw silage/Chinese wildrye/oat grass/concentrate/combined effect分类
农业科技引用本文复制引用
张一帆,李建国,李妍,刘涛,郑玉琳,曹玉凤,高艳霞,张秀江,刘泽,李秋凤..玉米秸秆青贮、羊草、燕麦草与精饲料组合效应的研究[J].动物营养学报,2019,31(8):3853-3862,10.基金项目
农业部公益性行业专项(201503134) （201503134）
河北省奶牛创新团队项目( HBCT2018120203) （ HBCT2018120203）
国家现代农业(奶牛)产业技术体系建设专项资金( CARS⁃36) （奶牛）
