Effect of different additive treatments on nutrient composition and fermentation quality of rice straw
This study investigated the impact of different additive treatments on the nutrient composition and fermentation quality of rice straw,aiming to enhance the utilization efficiency of rice straw.The experiment used rice straw as the ensiling material.Different experimental groups were treated with 1.0 g/kg enzyme preparation,2.0 g/kg microbial preparation,and a combination of 1.0 g/kg enzyme preparation and 2.0 g/kg microbial preparation,respectively.The control group did not receive any additives,and each group had four replicates.After 60 days of ensiling,samples were taken to assess the sensory characteristics,nutritional components,fermentation quality,and rumen nutrient degradation of rice straw silage in each group.The results showed that the sensory total score of rice straw silage in the control group was 13 points,indicating a fair quality(Grade 2),while the groups treated with enzyme,microbial,and combined enzyme-microbial preparations exhibited better sensory evaluations,reaching a good quality level(Grade 1).Compared with the control group,the dry matter content and total digestible nutrient content of the rice straw silage increased in the experimental group 2 and group 3(P<0.05).In the experimental group 3,the crude fat content increased(P<0.05),and the acid detergent fiber content decreased(P<0.05).The neutral detergent fiber content decreased(P<0.05),soluble carbohydrates increased(P<0.05),and the relative feeding value increased in the experimental group 1,group 2,and group 3(P<0.05).Compared with the control group,the concentrations of acetic acid and total volatile fatty acids increased in the experimental group 2 and group 3(P<0.05).The pH value decreased in the experimental group 1,group 2,and group 3(P<0.05),and the NH3-N concentration decreased in the experimental group 3(P<0.05).Compared with the control group,the degradation rates of crude protein,neutral detergent fiber,and dry matter increased in the experimental group 1,group 2,and group 3(P<0.05).The study indicates that treatment with an enzyme preparation,a microbial preparation,and the combination of both can improve the sensory evaluation of ensiled rice straw,increase the nutrient content of rice straw silage,and enhance the degradation rate of rumen nutrients,with the combined treatment showing better results than individual enzyme or microbial treatments.
万方数据
维普
