Feedstock-dependent abundance of functional genes related to nitrogen transformation controlled nitrogen loss in composting

被引：0
|
作者：
Yin, Siqian [1 ]
Zhang, Wenming [1 ]
Tong, Tianjian [2 ]
Yu, Chenxu [2 ]
Chang, Xinyi [1 ]
Chen, Kaishan [1 ]
Xing, Yanhong [1 ]
Yang, Yingxiang [1 ]
机构：
[1] College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou,730070, China
[2] Department of Agriculture and Biosystem Engineering, Iowa State University, Ames,50010, United States
来源：
Bioresource Technology | 2022年 / 361卷
关键词：
Chicken manure - Functional genes - Highest temperature - Nitrogen cycles - Nitrogen fixation genes - Nitrogen loss - Nitrogen transformations - Sheep manure;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The objective of this work was to explore how selection of feedstock affects nitrogen cycle genes during composting, which eventually determines the nitrogen loss. Four composting mixes (CM: chicken manure; SM: sheep manure; MM1/3: mixed manure with CM: SM = 1:3 w/w, MM3/1: CM: SM = 3:1 w/w) were investigated. Results showed that adding 25 % and 75 % SM to CM reduced 26.5 % and 57.9 % nitrogen loss, respectively. CM contained more ammonification genes and nrfA gene, while SM had more denitrification genes. Nitrogen fixation genes in CM were slightly higher than that in SM at the initial stage, but they sharply dropped off as the composting entered the high temperature stage. MM1/3 showed significantly reduced ammonification genes than CM, and increased nitrogen fixation and NH4+ assimilation genes. Therefore, adding SM to CM could change the abundance of genes and enzymes related to nitrogen cycle to reduce nitrogen loss. © 2022 Elsevier Ltd
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