Soil Enzyme Activities on Eroded Slopes in the Sichuan Basin, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Soil Enzyme Activities on Eroded Slopes in the Sichuan Basin, China
	Nie Xiaojun 1; Zhang Jianhui2 ; Gao Han 1
刊名	PEDOSPHERE
	2015-08-01
卷号	25 期号:4 页码:489-500
关键词	Cs-137 technique microbial biomass C N cycle P cycle soil organic C soil redistribution tillage erosion water erosion
ISSN号	1002-0160
通讯作者	Zhang Jianhui
英文摘要	Determining how soil erosion affects enzyme activity may enhance our understanding of soil degradation on eroded agricultural landscapes. This study assessed the changes in enzyme activity with slope position and erosion type by selecting water and tillage erosion-dominated slopes and performing analyses using the Cs-137 technique. The Cs-137 data revealed that soil loss occurred in the upper section of the two eroded slope types, while soil accumulation occurred in the lower section. The invertase activity increased downslope and exhibited a pattern similar to the Cs-137 data. The spatial patterns of urease and alkaline phosphatase activities were similar to the Cs-137 inventories on the water and tillage erosion-dominated slopes, respectively. On both the eroded slope types, the invertase activity and soil organic carbon content were correlated, but no correlation was observed between the alkaline phosphatase activity and total phosphorus content. Nevertheless, the urease activity was correlated with the total nitrogen content only on the water erosion-dominated slopes. The enzyme activity-to-microbial biomass carbon ratios indicated high activities of invertase and urease but low activity of phosphatase on the water erosion-dominated slopes compared with the tillage erosion-dominated slopes. Both the invertase activity and the invertase activity-to-microbial biomass carbon ratio varied with the slope position. Changes in the urease activity-to-microbial biomass carbon ratio were significantly affected by the erosion type. These suggested that the dynamics of the invertase activity were linked to soil redistribution on the two eroded slope types, whereas the dynamics of the urease and alkaline phosphatase activities were associated with soil redistribution only on the water or tillage erosion-dominated slopes, respectively. The erosion type had an obvious effect on the activities of invertase, urease and alkaline phosphatase. Soil redistribution might influence the involvement of urease in the N cycle and alkaline phosphatase in the P cycle. Thus, enzyme activity-to-microbial biomass ratios may be used to better evaluate microbiological activity in eroded soils.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Soil Science
研究领域[WOS]	Agriculture
关键词[WOS]	SEMIARID MEDITERRANEAN AGROECOSYSTEM ; MICROBIAL BIOMASS ; TILLAGE EROSION ; ORGANIC-CARBON ; LOESS PLATEAU ; ARYLSULFATASE ACTIVITIES ; BIOCHEMICAL-PROPERTIES ; ARABLE FIELDS ; LAND-USE ; REDISTRIBUTION
收录类别	SCI
语种	英语
WOS记录号	WOS:000358630600001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/10821]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Henan Polytech Univ, Land Res Integrated Monitoring & Sustainable Util, Minist Land & Resources China, Sch Surveying & Land Informat Engn, Jiaozuo 454003, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Nie Xiaojun,Zhang Jianhui,Gao Han. Soil Enzyme Activities on Eroded Slopes in the Sichuan Basin, China[J]. PEDOSPHERE,2015,25(4):489-500.
APA	Nie Xiaojun,Zhang Jianhui,&Gao Han.(2015).Soil Enzyme Activities on Eroded Slopes in the Sichuan Basin, China.PEDOSPHERE,25(4),489-500.
MLA	Nie Xiaojun,et al."Soil Enzyme Activities on Eroded Slopes in the Sichuan Basin, China".PEDOSPHERE 25.4(2015):489-500.