Changes in SOC and Nutrients under Intensive Tillage in Two Types of Slope Landscapes

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 > 山地灾害与地表过程重点实验室

	Changes in SOC and Nutrients under Intensive Tillage in Two Types of Slope Landscapes
	Li Fucheng1,2 ; Zhang Jianhui1,3 ; Su Zhengan1,3
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2012-02-01
卷号	9 期号:1 页码:67-76
关键词	SOC Soil chemical property Complex slope Tillage erosion Three Gorges reservoir area
ISSN号	1672-6316
通讯作者	Zhang JH
英文摘要	The net effect of tillage erosion on soil properties would be associated with the spatial variation in soil constituents, and therefore plays an important role in ecological agriculture. We conducted a consecutive tillage by hoeing 15 times during a period with no rainfall in the two slope landscapes (a linear slope and complex slope) of the Yangtze Three Gorges reservoir areas, to examine the relationship between soil erosion rates and the variations in soil chemical properties and compare the effects of soil redistribution on SOC and nutrients between the linear and complex slopes. After the simulated tillage, notable changes in Cs-137 inventories of the soil occurred in the summit and toeslope positions on the linear slope, while there were significant changes in Cs-137 inventories at convex and concave positions on the complex slope. Soil profile disappeared at the summit slope boundary, with the exposure area of 16.0% and 7.6% of the experimental plot, respectively, for the linear and complex slopes due to no soil replacement. Soil organic C and nutrients were completely depleted with the disappearance of soil profiles at soil eroding zones, whereas a remarkable increase in SOC, total N and available nutrient concentrations of the post-tillage surface soil and a decrease in total nutrient concentrations (P and K) were found at depositional zones on the linear slope. For the complex slope, however, changes in SOC and nutrient concentrations of the post-tillage surface soil exhibited a pattern different from that on the linear slope, which showed a remarkable decrease in SOC and total nutrient concentrations but a slight increase in available nutrient concentrations after tillage in the toeslope position. Due to the gradual increase in soil depth from top to bottom of the slope, SOC and nutrient inventories in the soil profiles were significantly correlated with soil redistribution rates on both the linear and complex slopes. Tillage causes remarkable changes of soil chemical properties in the surface soil layer and soil profile, and increases SOC and nutrient inventories for the soil profile downslope in steeply sloping landscapes.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	SOIL REDISTRIBUTION ; WATER EROSION ; CROP YIELD ; TRANSLOCATION ; LAND ; CS-137 ; CONSTITUENTS ; HILLSLOPES ; TERRACES ; DYNAMICS
收录类别	SCI
原文出处	http://link.springer.com/article/10.1007%2Fs11629-012-2192-1
语种	英语
WOS记录号	WOS:000301789000008
公开日期	2012-12-13
内容类型	期刊论文
源URL	[http://192.168.143.20:8080/handle/131551/4508]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2012_Vol9 No.1 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.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Li Fucheng,Zhang Jianhui,Su Zhengan. Changes in SOC and Nutrients under Intensive Tillage in Two Types of Slope Landscapes[J]. JOURNAL OF MOUNTAIN SCIENCE,2012,9(1):67-76.
APA	Li Fucheng,Zhang Jianhui,&Su Zhengan.(2012).Changes in SOC and Nutrients under Intensive Tillage in Two Types of Slope Landscapes.JOURNAL OF MOUNTAIN SCIENCE,9(1),67-76.
MLA	Li Fucheng,et al."Changes in SOC and Nutrients under Intensive Tillage in Two Types of Slope Landscapes".JOURNAL OF MOUNTAIN SCIENCE 9.1(2012):67-76.