Appropriate nitrogen supply could improve soil microbial and chemical characteristics with Sophora davidii seedlings cultivated in water stress conditions

	Appropriate nitrogen supply could improve soil microbial and chemical characteristics with Sophora davidii seedlings cultivated in water stress conditions
	Wu, Fuzhong ; Bao, Weikai ; Zhou, Zhiqiong ; Li, Fanglan
刊名	ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE
	2012
卷号	62 期号:1 页码:49-58
关键词	Arid environment enzyme activity microbial biomass N supply water deficit
ISSN号	0906-4710
通讯作者	Bao, WK (reprint author), Chinese Acad Sci, ECORES Lab, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
产权排序	1
英文摘要	A greenhouse experiment was conducted to investigate the changes of soil microbial activities and chemical properties under different water and nitrogen (N) supply conditions. A completely randomized design was subjected to three water regimes (80%, 40% and 20% water field capacity (FC)) and three N supply regimes (control, N0: 0 mg N kg(-1) soil; low N supply, Nl: 92 mg N kg(-1) soil; and high N supply, Nh: 184 mg N kg(-1) soil) by potting with 2-month-old Sophora davidii seedlings. Water stress decreased the content of soil organic carbon (C), available N and phosphorus (P), the ratio of C/N, the ratio of C/P, as well as activities of soil invertase, urease and alkaline phosphatase, but not reduced microbial biomass C, N and P contents. Soil microbial and chemical characteristics also exhibited strong responses to N supply, and these responses were inconsistent among N supply levels. The contents of soil organic C and available P showed stronger positive responses to Nl than to Nh, while the available N content increased with increasing N supply. Additionally, Nl rather than the other two N treatments led to increased microbial biomass N and invertase activity under 20% FC treatment, even though the invertase activity increased in Nh treatment under 40% FC and 80% FC treatments. Nl treatment also increased the C/P ratio and alkaline phosphatase activity. These results suggest that water and N co-limited nutrient mineralization and microbial activity, and that these characteristics responded positively to Nl. Therefore, appropriate or low N supply is recommended to increase soil quality restrained by water stress, thereby facilitating S. davidii seedling establishment under water deficit conditions.
学科主题	Agriculture
收录类别	SCI
资助信息	State Key Basic Research and Development Plan of China [(2005)CB422006]; Chinese Academy of Science [KZCX2-XB2-02]
语种	英语
WOS记录号	WOS:000298292200006
公开日期	2013-07-03
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/23840]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Wu, Fuzhong,Bao, Weikai,Zhou, Zhiqiong,et al. Appropriate nitrogen supply could improve soil microbial and chemical characteristics with Sophora davidii seedlings cultivated in water stress conditions[J]. ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE,2012,62(1):49-58.
APA	Wu, Fuzhong,Bao, Weikai,Zhou, Zhiqiong,&Li, Fanglan.(2012).Appropriate nitrogen supply could improve soil microbial and chemical characteristics with Sophora davidii seedlings cultivated in water stress conditions.ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE,62(1),49-58.
MLA	Wu, Fuzhong,et al."Appropriate nitrogen supply could improve soil microbial and chemical characteristics with Sophora davidii seedlings cultivated in water stress conditions".ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE 62.1(2012):49-58.