Wang Xiaolin, Song Jiamei, Liu Zihan, Zhang Guangning, Zhang Yonggen
College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China.
Animals (Basel). 2022 Apr 3;12(7):919. doi: 10.3390/ani12070919.
The objective of this study was to investigate the fermentation quality and microbial community of corn stover (CS) or rice straw (RS) silage mixed with soybean curd residue (SCR). In this study, SCR and CS or RS were mixed at ratios of 75:25, 70:30, and 65:35, respectively, and measured for nutrient content, fermentation indices, and bacterial diversity after 30 days of ensiling. The results showed an increase in lactic acid (LA) concentration (p < 0.01) and crude protein (CP) content (p < 0.0001), a decrease in pH value (p < 0.01), the content of NDF (p < 0.01) and ADF (p < 0.01), and ammonia nitrogen (AN) concentration (p < 0.01) as the proportion of SCR in raw materials (CS or RS) increased. The addition of SCR to silage led to a decrease in bacterial diversity and contributed to an increased relative abundance of beneficial microorganisms, such as Lactobacillus, and a corresponding decrease in the relative abundance of undesirable microorganisms, such as Clostridium and Enterobacter. Collectively, the mixed silage of soybean curd residue with corn stover or rice straw preserved more nutrients and helped improve fermentation quality.
本研究的目的是调查与豆腐渣（SCR）混合的玉米秸秆（CS）或稻草（RS）青贮饲料的发酵品质和微生物群落。在本研究中，SCR与CS或RS分别按75:25、70:30和65:35的比例混合，并在青贮30天后测定其营养成分、发酵指标和细菌多样性。结果表明，随着原料（CS或RS）中SCR比例的增加，乳酸（LA）浓度升高（p<0.01）、粗蛋白（CP）含量增加（p<0.0001）、pH值降低（p<0.01）、中性洗涤纤维（NDF）含量降低（p<0.01）、酸性洗涤纤维（ADF）含量降低（p<0.01）以及氨态氮（AN）浓度降低（p<0.01）。向青贮饲料中添加SCR导致细菌多样性降低，并使有益微生物如乳酸杆菌的相对丰度增加，以及使不良微生物如梭菌和肠杆菌的相对丰度相应降低。总体而言，豆腐渣与玉米秸秆或稻草的混合青贮饲料保留了更多营养成分，并有助于改善发酵品质。
