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Ecoenzymatic stoichiometry reflects the regulation of microbial carbon and nitrogen limitation on soil nitrogen cycling potential in arid agriculture ecosystems

文献类型：期刊论文

作者Ye, Zhencheng1; Wang, Jie1; Li, Jing2; Zhang, Chao1; Liu, Guobin1,3; Dong, Qinge1
刊名JOURNAL OF SOILS AND SEDIMENTS
出版日期2022-01-27
页码14
关键词Irrigation Fertilization Extracellular enzyme activity Microbial metabolic limitation Nitrogen cycling
ISSN号1439-0108
DOI10.1007/s11368-022-03142-x
通讯作者Zhang, Chao(zhangchaolynn@163.com)
英文摘要Purpose Water and nutrient availability are critical factors that affect soil biological processes in agroecological systems, which are regulated by extracellular ecoenzymatic activity; however, the response of these enzymes to water and nutrient levels is poorly understood. Methods A 4-year field experiment with three levels of irrigation (high, 400 mm; medium, 300 mm; and low, 200 mm) and two levels of fertilization (high, 600 kg/ha P2O5 + 300 kg/ha urea; and low, 300 kg/ha P2O5 + 150 kg/ha urea) was conducted to investigate the microbial metabolic status in an arid agroecological system in China using the model of extracellular enzymatic stoichiometry. Results Higher C-acquisition enzyme activity and lower N-acquisition enzyme activity were observed during the crop growth stage, suggesting promoted C limitation and alleviated N limitation for microbes by the combination of medium irrigation and low fertilization. Increased microbial C limitation surged the abundance of amoA-AOA and amoA-AOB genes involved in nitrification and strengthened this process. Decreased microbial N limitation hindered the denitrification potential by reducing the abundance of the involved nirK, nirS, nosZ, and narG genes. Increased microbial C limitation was due to the elevated soil water content, which further promoted the activity of C-acquiring enzymes and facilitated microbial decomposition of organic matter. The decreased microbial N limitation was largely related to the increased soil N availability. Conclusions These findings suggest that a combination of medium irrigation and low fertilization is effective for organic matter decomposition, by promoting microbial C metabolism and reducing the risk of N loss via alleviation of microbial N limitation. Our results emphasize the roles of stoichiometry-regulated microbial metabolism in soil nutrient transformation and have implications for agricultural practices in arid fertigation agroecosystems.
WOS关键词EXTRACTION METHOD ; ENZYME-ACTIVITY ; FERTILIZATION ; RESPIRATION ; GRASSLAND ; EMISSIONS ; COMMUNITY ; TRANSECT ; GENES ; N2O
资助项目West Light Foundation of Chinese Academy of Science[XAB2020YN05] ; Natural Science Basic Research Program of Shaanxi Province[2019KJXX-081] ; Natural Science Basic Research Program of Shaanxi Province[2021JM-605] ; National Natural Sciences Foundation of China[4177449] ; Strategic Priority Program of the Chinese Academy of Sciences (CAS)[XDA20040200] ; Chinese Universities Scientific Fund[2452018336]
WOS研究方向Environmental Sciences & Ecology ; Agriculture
语种英语
WOS记录号WOS:000747080300001
出版者SPRINGER HEIDELBERG
资助机构West Light Foundation of Chinese Academy of Science ; Natural Science Basic Research Program of Shaanxi Province ; National Natural Sciences Foundation of China ; Strategic Priority Program of the Chinese Academy of Sciences (CAS) ; Chinese Universities Scientific Fund
源URL[http://ir.igsnrr.ac.cn/handle/311030/170795]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Chao
作者单位1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, Coll Forestry, Yangling 712100, Shaanxi, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Ye, Zhencheng,Wang, Jie,Li, Jing,et al. Ecoenzymatic stoichiometry reflects the regulation of microbial carbon and nitrogen limitation on soil nitrogen cycling potential in arid agriculture ecosystems[J]. JOURNAL OF SOILS AND SEDIMENTS,2022:14.
APA Ye, Zhencheng,Wang, Jie,Li, Jing,Zhang, Chao,Liu, Guobin,&Dong, Qinge.(2022).Ecoenzymatic stoichiometry reflects the regulation of microbial carbon and nitrogen limitation on soil nitrogen cycling potential in arid agriculture ecosystems.JOURNAL OF SOILS AND SEDIMENTS,14.
MLA Ye, Zhencheng,et al."Ecoenzymatic stoichiometry reflects the regulation of microbial carbon and nitrogen limitation on soil nitrogen cycling potential in arid agriculture ecosystems".JOURNAL OF SOILS AND SEDIMENTS (2022):14.

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来源：地理科学与资源研究所

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