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Bioresource Technology
Vol. 313, 2020

Dynamic microbial diversity and fermentation quality of the mixed silage of corn and soybean grown in strip intercropping system

Tairu Zenga,1, Xiaoling Lia,1, Hao Guana,1, Wenyu Yangb, Weiguo Liub, Jiang Liub, Zhaochang Dua, Xiaomei Lia,c, Qiyin Xiaod, Xiaochun Wangb, Xinquan Zhanga, Linkai Huanga, Quanju Xiange, Quanhui Pengf, Yanhong Yana

Animal Science and Technology College, Sichuan Agricultural University, Chengdu 610000, China


This study assessed the fermentation quality and microbial community of corn (Zea mays L.) and soybean (Glycine max Merr.) (CS) mixed silage in strip intercropping system. CS mixed silage increased lactic acid content and decreased ammonia-N content compared to 100% soybean (S) silage, while it decreased ammonia-N content compared to 100% corn (C) silage. The largest number of epiphytic lactic acid bacteria was detected in CS fresh materials. During ensiling, Weissella and Lactobacillus dominated silage, the relative abundance of Lactobacillus in mixed silage was higher than that in S silage with the same S variety. After aerobic exposure (AE), synergistic effect existed in low relative abundance bacteria correlating with ammonia-N content and pH at ensiling 60 days and AE 7 days. In conclusion, CS mixed silage modified microbial community and improved fermentation quality.

Keywords: Corn, Soybean, Mixed ensiling, Fermentation quality, Microbial community

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