Evaluation of Feeding Value of 4 Varieties of Whole Plant Sorghum Silage
Based on the determination of the conventional nutritional components and tannin contents of 4 vari-eties of whole plant sorghum silage,the feeding value of the silage was evaluated by in vitro gas production and nylon bag methods.Four varieties of sorghum(Jinnuo No.3,Liaotian No.1,Jinza 2001 and Jinza 1531)were selected to prepare whole plant sorghum silage,and the conventional nutritional components and tannin contents of the silage were determined after opening the bucket.The gas production,and the disappearance rates of dry matter(DM),crude protein(CP),neutral detergent fiber(NDF)and acid detergent fiber(ADF)of 4 varieties of whole plant sorghum silage were measured by in vitro simulated rumen fermentation and nylon bag method,and the degradation parameters were calculated.The results showed as follows:1)the contents of starch and CP of 4 varieties of whole plant sorghum silage were 10.94％to 24.30％and 4.50％to 7.50％,respectively,and there were significant differences among different varieties(P＜0.05),but Jinnuo No.3 had the highest content,followed by Jinza 2001,and Liaotian No.1 had the lowest.2)There were no significant differences in 72 h gas production,and fermentation fluid pH and total volatile fatty acid(TVFA)concentration among 4 varieties of whole plant sorghum silage(P＞0.05),but the acetic acid concentration and the acetate to propionate ratio(A/P)in fermentation fluid of Liaotian No.1 whole plant sorghum silage were significantly higher than those of the other varieties(P＜0.05).3)The DM disappearance rate of Jinnuo No.3 whole plant sorghum silage was significantly higher than that of the other three varieties within 48 h(P＜0.05),significantly higher than that of Jinza 1531 and Liaotian No.1 at 72 h(P＜0.05),and the effective de-gradability(ED)of DM was the highest;the disappearance rates of CP,NDF and ADF of Liaotian No.1 whole plant sorghum silage were significantly higher than those of the other varieties(P＜0.05).In conclusion,Jinnuo No.3 whole plant sorghum silage has high nutritional component contents and is easy to digest,so it has good feeding value.[Chinese Journal of Animal Nutrition,2024,36(3):1997-2009]
in vitro gas production methodnylon bag methodwhole plant sorghum silagenutritional com-ponentsfeeding value
万方数据
维普
