干旱区生态环境知识资源中心(Arid): Effect of Soil Drying Intensity During an Experimental Drying-Rewetting Event on Nutrient Transformation and Microbial Community Composition

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	Effect of Soil Drying Intensity During an Experimental Drying-Rewetting Event on Nutrient Transformation and Microbial Community Composition
	Sun Dasheng; Bi Qingfang; Li Kejie; Zhu Jun; Zhang Qichun; Jin Chongwei; Lu Lingli; Lin Xianyong
来源期刊	Pedosphere
ISSN	1002-0160
出版年	2018
卷号	28 期号:4 页码:644-655
英文摘要	Soil drying-rewetting (DRW) events affect nutrient transformation and microbial community composition;however,little is known about the influence of drying intensity during the DRW events.Therefore,we analyzed soil nutrient composition and microbial communities with exposure to various drying intensities during an experimental drying-rewetting event,using a silt loam from a grassland of northern China,where the semi-arid climate exposes soils to a wide range of moisture conditions,and grasslands account for over 40% of the nation's land area.We also conducted a sterilization experiment to examine the contribution of soil microbes to nutrient pulses.Soil drying-rewetting decreased carbon (C) mineralization by 9%-27%.Both monosaccharide and mineral nitrogen (N) contents increased with higher drying intensities (drying to ≤ 10% gravimetric water content),with the increases being 204% and 110% with the highest drying intensity (drying to 2% gravimetric water content),respectively,whereas labile phosphorus (P) only increased (by 105%) with the highest drying intensity.Moreover,levels of microbial biomass C and N and dissolved organic N decreased with increasing drying intensity and were correlated with increases in dissolved organic C and mineral N,respectively,whereas the increases in labile P were not consistent with reductions in microbial biomass P.The sterilization experiment results indicated that microbes were primarily responsible for the C and N pulses,whereas non-microbial factors were the main contributors to the labile P pulses.Phospholipid fatty acid analysis indicated that soil microbes were highly resistant to drying-rewetting events and that drought-resistant groups were probably responsible for nutrient transformation.Therefore,the present study demonstrated that moderate soil drying during drying-rewetting events could improve the mineralization of N,but not P,and that different mechanisms were responsible for the C,N,and P pulses observed during drying-rewetting events.
英文关键词	drought-resistant microbial groups gravimetric water content microbial biomass nutrient mineralization nutrient pulse soil microbes soil respiration
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Science & Technology - Other Topics
CSCD记录号	CSCD:6334640
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336003
作者单位	Sun Dasheng, College of Resources and Environment,Shanxi Agricultural University, Taigu, Shanxi 030801, China.; Bi Qingfang, College of Environmental & Resource Sciences,Zhejiang University, Key Laboratory of Environment Remediation and Ecological Health,Ministry of Education, Hangzhou, Zhejiang 310058, China.; Li Kejie, College of Environmental & Resource Sciences,Zhejiang University, Key Laboratory of Environment Remediation and Ecological Health,Ministry of Education, Hangzhou, Zhejiang 310058, China.; Zhu Jun, College of Environmental & Resource Sciences,Zhejiang University, Key Laboratory of Environment Remediation and Ecological Health,Ministry of Education, Hangzhou, Zhejiang 310058, China.; Zhang Qichun, Institute of Soil and Water Resources and Environment,Zhejiang University, Hangzhou, Zhejiang 310058, China.; Jin Chongwei, College of Environmental & Resource Sciences,Zhejiang University;;College of Environmental & Resource Sciences,Zhejiang University, Key Laboratory of Environment Remediation ...
推荐引用方式 GB/T 7714	Sun Dasheng,Bi Qingfang,Li Kejie,et al. Effect of Soil Drying Intensity During an Experimental Drying-Rewetting Event on Nutrient Transformation and Microbial Community Composition[J],2018,28(4):644-655.
APA	Sun Dasheng.,Bi Qingfang.,Li Kejie.,Zhu Jun.,Zhang Qichun.,...&Lin Xianyong.(2018).Effect of Soil Drying Intensity During an Experimental Drying-Rewetting Event on Nutrient Transformation and Microbial Community Composition.Pedosphere,28(4),644-655.
MLA	Sun Dasheng,et al."Effect of Soil Drying Intensity During an Experimental Drying-Rewetting Event on Nutrient Transformation and Microbial Community Composition".Pedosphere 28.4(2018):644-655.