干旱区生态环境知识资源中心(Arid): Oxidases and hydrolases mediate soil organic matter accumulation in chernozem of northeastern China

Arid

DOI	10.1016/j.geoderma.2021.115206
	Oxidases and hydrolases mediate soil organic matter accumulation in chernozem of northeastern China
	Wu, Guohui; Chen, Zhenhua; Jiang, Dongqi; Jiang, Nan; Jiang, Hui; Chen, Lijun
通讯作者	Jiang, N ; Chen, LJ (corresponding author), Wenhua Rd 72, Shenyang 110016, Peoples R China.
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2021
卷号	403
英文摘要	An enzymatic latch on carbon store in peatlands or desert soils has been verified but has rarely been examined in a cultivated field with a high pH and a high calcium carbonate content. Soil organic matter (SOM) contents of chernozem have decreased over the last few decades in northeast China. However, the enzymatic mechanism of SOM loss in this region remains unclear. An experiment was conducted to investigate the effects of soil oxidases and hydrolases on SOM, the correlations between soil oxidases and hydrolases, and the relationships between soil microbial community and related soil enzymes with 40 soil samples from different cultivated fields in Lishu County, northeastern China. The results showed that SOM increased significantly over the pH range of 5.0-7.0, and decreased sharply in the range of 7.0-8.0. Soil oxidases (peroxidase and total oxidases) activities showed significant and negative correlations with SOM content but positive correlations with hydrolases (beta-glucosidase, beta-xylosidase and total hydrolases) activities. The SOM content was significantly and negatively correlated with alpha-glucosidase, beta-glucosidase, cellobiohydrolase, beta-xylosidase, and total hydrolases activities. Results of redundancy analysis indicated that all soil hydrolases activities had positive relationships with bacteria i15:0, 16:3 omega 6c and 16:0. Peroxidase and total oxidases activities were positively associated with bacteria cy17:0 omega 7c, 15:0 DMA, i16:0, 18:0, i17:0, 14:0, 15:0 and actinomycetes 17:0 10-methyl, 18:0 10-methyl, while phenol oxidase activity was positively associated with bacteria i17:1 omega 9c, 17:1 omega 8c, i14:0 and fungi 18:1 omega 9c. These findings confirmed the enzymatic latch mechanism of SOM accumulation in this test chernozem, which means that oxidases relieve the inhibition of hydrolases, resulting in SOM hydrolysis by higher hydrolases activities.
英文关键词	Soil organic matter Hydrolases activities Oxidases activities Soil microbial community Chernozem Enzymatic latch
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000671591200011
WOS关键词	MICROBIAL COMMUNITY COMPOSITION ; ENZYME-ACTIVITIES ; SPATIAL-DISTRIBUTION ; PHENOL OXIDASE ; STRAW RETURN ; LAND-USE ; CARBON ; BACTERIAL ; PH ; DIVERSITY
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350385
作者单位	[Wu, Guohui; Chen, Zhenhua; Jiang, Dongqi; Jiang, Nan; Chen, Lijun] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China; [Wu, Guohui; Jiang, Dongqi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Jiang, Hui] Dalian Ctr Certificat & Food & Drug Control, Dalian 116037, Peoples R China
推荐引用方式 GB/T 7714	Wu, Guohui,Chen, Zhenhua,Jiang, Dongqi,et al. Oxidases and hydrolases mediate soil organic matter accumulation in chernozem of northeastern China[J],2021,403.
APA	Wu, Guohui,Chen, Zhenhua,Jiang, Dongqi,Jiang, Nan,Jiang, Hui,&Chen, Lijun.(2021).Oxidases and hydrolases mediate soil organic matter accumulation in chernozem of northeastern China.GEODERMA,403.
MLA	Wu, Guohui,et al."Oxidases and hydrolases mediate soil organic matter accumulation in chernozem of northeastern China".GEODERMA 403(2021).