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	Soil microbial biomass and activity response to repeated drying-rewetting cycles along a soil fertility gradient modified by long-term fertilization management practices
	Zhao, Bingzi; Chen, Ji; Zhang, Jiabao; Qin, Shengwu
刊名	GEODERMA
	2010-12-15
卷号	160期号:2页码:218-224
关键词	Drying-rewetting Long-term fertilization management practices Soil fertility Variation in soil properties
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2010.09.024
通讯作者	Zhao, Bingzi(bzhao@issas.ac.cn)
英文摘要	The effects of repeated drying-rewetting (DRW) cycles on the microbial biomass and activity in soils taken from long-term field experiment plots with different fertilization (FERT) management practice histories were studied. We investigated the hypothesis that soil response to DRW cycles differs with soil fertility gradient modified by FERT management practices. The soils were incubated for 51 days, after exposure to either nine or three DRW cycles, or remaining at constant moisture content (CMC) at field capacity. We found that both DRW and FERT significantly affected soil properties including NH(4)-N, NO(3)-N, dissolved organic C (DOC), microbial biomass C (Cmic), basal soil respiration rate (BSR), urease activity (URE) and dehydrogenase activity (DHD). Except for NH(4)-N and BSR, variation in the properties was largely explained by FERT, followed by DRW, and then their interaction. Irrespective of the soils' FERT treatment, repeated DRW cycles significantly raised the DOC and Cmic levels compared with CMC, and the DRW cycles also resulted in a significant decline in BSR and URE and increase in DHD, probably because the organisms were better-adapted to the drying and rewetting stresses. The variations in soil biological properties caused by DRW cycles showed a significantly negative relationship with the soil organic C content measured prior to the start of the DRW experiments, suggesting that soils with higher fertility are better able to maintain their original biological functions (i.e., have a higher functional stability) in response to DRW cycles. (C) 2010 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	BACTERIAL COMMUNITY STRUCTURE ; ENZYME-ACTIVITIES ; N-MINERALIZATION ; ORGANIC-MATTER ; MEDITERRANEAN CONDITIONS ; GRASSLAND SOILS ; WETTING CYCLES ; LOAM SOIL ; CARBON ; DYNAMICS
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000285819800009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558848
专题	南京土壤研究所
通讯作者	Zhao, Bingzi
作者单位	Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Bingzi,Chen, Ji,Zhang, Jiabao,et al. Soil microbial biomass and activity response to repeated drying-rewetting cycles along a soil fertility gradient modified by long-term fertilization management practices[J]. GEODERMA,2010,160(2):218-224.
APA	Zhao, Bingzi,Chen, Ji,Zhang, Jiabao,&Qin, Shengwu.(2010).Soil microbial biomass and activity response to repeated drying-rewetting cycles along a soil fertility gradient modified by long-term fertilization management practices.GEODERMA,160(2),218-224.
MLA	Zhao, Bingzi,et al."Soil microbial biomass and activity response to repeated drying-rewetting cycles along a soil fertility gradient modified by long-term fertilization management practices".GEODERMA 160.2(2010):218-224.

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