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Modified cornstalk biochar can reduce ammonia emissions from compost by increasing the number of ammonia-oxidizing bacteria and decreasing urease activity

文献类型： 外文期刊

作者： Zhou, Shizheng 1 ; Wen, Xin 1 ; Cao, Zhen 1 ; Cheng, Ran 1 ; Qian, Yuliang 1 ; Mi, Jiandui 1 ; Wang, Yan 1 ; Liao, Xindi; 1 ;

作者机构： 1.South China Agr Univ, Coll Anim Sci, Guangdong Lab Lingnan Modern Agr, Guangzhou 510642, Peoples R China

2.Minist Agr, Guangdong Prov Key Lab Agroanim Genom & Mol Breed, Guangzhou 510642, Guangdong, Peoples R China

3.Minist Agr, Key Lab Chicken Genet Breeding & Reprod, Guangzhou 510642, Guangdong, Peoples R China

4.South China Agr Univ, Minist Agr, Key Lab Trop Agr Environm, Guangzhou 510642, Peoples R China

5.Guangdong Engn Technol Res Ctr Harmless Treatment, Yunfu 527400, Xinxing, Peoples R China

6.WENS Foodstuff Grp Co Ltd, Yunfu 527400, Xinxing, Peoples R China

7.Foshan Customs Comprehens Technol Ctr, Guangzhou 528000, Peoples R China

关键词： Composting; Layer manure; Biochar; Ammonia; Nitrogen functional gene

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN： 0960-8524

年卷期： 2021 年 319 卷

页码：

收录情况： SCI

摘要： This study examined how the addition of modified cornstalk biochar (CB) affected ammonia (NH3) emissions during composting. Four treatments were established, including a control (CK) with layer manure and sawdust only, and the CK mixtures adding 10% HNO3 CB (NA), 10% H2O2 CB (HP) and 10% HNO3-H2O2 CB (MI). As the results showed, NH3 emissions was reduced by 47.83% (NA), 61.69% (HP) and 45.69% (MI) when the modified CB used as a compost additive (P < 0.05). According to the data analysis, the addition of modified CB significantly increased the number of ammonia-oxidizing bacteria (AOB), inhibited urease activity and decreased the abundance of narG and nirS at rising temperatures and high temperatures (P < 0.05). Redundancy analysis demonstrated a negative correlation between NH3 emissions and AOB and a positive correlation with urease activity, narG and nirS. Thus, the modified CB helped reduce NH3 emissions by regulating nitrification processes.

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