Nitrogen and phosphorus transformations in the rhizospheres of three tree species in a nutrient-poor sandy soil

doi:10.1016/j.apsoil.2010.10.007

	Nitrogen and phosphorus transformations in the rhizospheres of three tree species in a nutrient-poor sandy soil
	Zhao, Qiong; Zeng, De-Hui; Fan, Zhi-Ping
刊名	APPLIED SOIL ECOLOGY
	2010-11-01
卷号	46 期号:3 页码:341-346
关键词	Nitrogen Mineralization Phosphorus Transformation Rhizosphere Effect Tree Species
ISSN号	0929-1393
DOI	10.1016/j.apsoil.2010.10.007
英文摘要	We examined acid phosphatase activity (APA), N mineralization and nitrification rates, available N and P. and microbial biomass C, N and P in rhizosphere and bulk soils of 18-year-old Siberian elm (Ulmus pumila), Simon poplar (Populus simonii) and Mongolian pine (Pinus sylvestris var. mongolica) plantations on a nutrient-poor sandy soil in Northeast China. The main objective was to compare the rhizosphere effects of different tree species on N and P cycling under nutrient-deficient conditions. All tree species had the similar pattern but considerably different magnitude of rhizosphere effects. The APA, potential net N mineralization and nitrification rates increased significantly (by 27-60%, 110-188% and 106-142% respectively across the three species) in rhizosphere soil compared to bulk soil. This led to significantly higher Olsen-P and NH(4)(+)-N concentrations in rhizosphere soil, whereas NO(3)(-)-N concentration was significantly lower in rhizosphere soil owing to increased microbial immobilization and root uptake. Microbial biomass C and N generally increased while microbial biomass P remained constant in rhizosphere soil relative to bulk soil, indicating the N-limited rather than P-limited microbial growth. Rhizosphere effects on P transformation were most pronounced for Siberian elm, while rhizosphere effects on N transformation were most pronounced for Mongolian pine, implying the different capacities of these species to acquire nutrients. (C) 2010 Elsevier B.V. All rights reserved.
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000285903400005
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121513]
专题	中国科学院沈阳应用生态研究所
通讯作者	Zeng, De-Hui
作者单位	Chinese Acad Sci, Inst Appl Ecol, Daqinggou Ecol Stn, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Qiong,Zeng, De-Hui,Fan, Zhi-Ping. Nitrogen and phosphorus transformations in the rhizospheres of three tree species in a nutrient-poor sandy soil[J]. APPLIED SOIL ECOLOGY,2010,46(3):341-346.
APA	Zhao, Qiong,Zeng, De-Hui,&Fan, Zhi-Ping.(2010).Nitrogen and phosphorus transformations in the rhizospheres of three tree species in a nutrient-poor sandy soil.APPLIED SOIL ECOLOGY,46(3),341-346.
MLA	Zhao, Qiong,et al."Nitrogen and phosphorus transformations in the rhizospheres of three tree species in a nutrient-poor sandy soil".APPLIED SOIL ECOLOGY 46.3(2010):341-346.