首页|Short-Term Responses of Nitrogen Mineralization and Microbial Community to Moisture Regimes in Greenhouse Vegetable Soils

Short-Term Responses of Nitrogen Mineralization and Microbial Community to Moisture Regimes in Greenhouse Vegetable Soils

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Soil drying and wetting impose significant influences on soil nitrogen (N) dynamics and microbial communities.However,effects of drying-wetting cycles,while common in vegetable soils,especially under greenhouse conditions,have not been well studied.In this study,two greenhouse vegetable soils,which were collected from Xinji (X J) and Hangzhou (HZ),China,were maintained at 30％ and 75％ water-holding capacity (WHC),or five cycles of 75％ WHC followed by a 7-day dry-down to 30％ WHC (DW).Soil inorganic N content increased during incubation.Net N mineralization (Nmin),microbial activity,and microbial biomass were significantly higher in the DW treatment than in the 30％ and 75％ WHC treatments.The higher water content (75％ WHC) treatment had higher Nmin,microbial activity,and microbial biomass than the lower water content treatment (30％ WHC).Multivariate analyses of community-level physiological profile (CLPP) and phospholipid fatty acid (PLFA) data indicated that soil moisture regime had a significant effect on soil microbial community substrate utilization pattern and microbial community composition.The significant positive correlation between Nmin and microbial substrate utilization or PLFAs suggested that soil N mineralization had a close relationship with microbial community.

drying-wetting cyclesmicrobial activitymicrobial biomassmicrobial substrate utilizationphospholipid fatty acid

CHEN Qiu-Hui、FENG Ying、ZHANG Yan-Ping、ZHANG Qi-Chun、I.H.SHAMSI、ZHANG Yong-Song、LIN Xian-Yong

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Key Laboratory of Environmental Remediation and Ecosystem Health of Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058(China)

Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058(China)

State Key Laboratory of Soil and Sustainable Agriculture,ChinaNational Basic Research Program (973 Program) of China国家自然科学基金国家自然科学基金International Plant Nutrition Institute (IPNI),USA

2007CB1093053097185930370840

2012

土壤圈(英文版)
中国土壤学会,中科院南京土壤研究所和土壤与农业可持续发展国家重点实验室

土壤圈(英文版)

CSTPCDCSCDSCI
影响因子：0.477
ISSN：1002-0160
年,卷(期)：2012.22(2)
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