Using Cesium-137 to investigate soil quality under conservation tillage on steep lands

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

	Using Cesium-137 to investigate soil quality under conservation tillage on steep lands
	Wang, Y.1,2,3 ; Zhang, J. H.1,2 ; Li, F. C.1,2
刊名	JOURNAL OF SOIL AND WATER CONSERVATION
	2014-09-01
卷号	69 期号:5 页码:439-448
关键词	Cesium-137 residual rate conservation tillage soil constituents soil quality soil redistribution
ISSN号	0022-4561
通讯作者	Y. Wang
英文摘要	Few studies have demonstrated the long-term effects of different tillage practices on changes of soil quality; however, understanding such effects is vital for the selection and establishment of appropriate soil conservation measures on steep hillslopes. This study was conducted at two adjacent sites in the Sichuan Basin, China, with one cultivated by traditional tillage (TT; i.e., hoeing starts at the bottom position and soil is moved downslope because of gravity and drag) and the other cultivated by conservation tillage (CT; i.e., hoeing is performed from hilltop to bottom, but soil is moved uphill because of drag). We used the Cesium-137 (Cs-137) tracer technique to identify the pattern of soil constituent distribution and soil quality differences between the two tillage practices. The Cs-137 residual rate for the CT practice ranged from -29.44% to 34.16% with an average of -8.56%, and the TT practice ranged from -57.12% to 4.63% with an average of -29.49%. A greater increase (ranging from 18.43% to 50.69%) in soil constituents (i.e., soil organic matter, total nitrogen [N], phosphorus [P], and potassium [K], available N, and extractable P and K) was found in the CT soils than in the TT soils. The CT treatment site exhibited markedly higher concentrations of soil constituents in each soil depth profile (0 to 40 cm [0 to 15.7 in] and each 5 cm [2 in] in length increment). The soil degradation index (SDI) for the CT practice significantly increased compared to the TT practice in the 0 to 15 cm (0 to 5.9 in) and 15 to 40 cm (5.9 to 15.7 in) depth of the profiles (p < 0.05). The greatest difference in SDI induced by these two tillage practices occurred at the summit and toeslope positions, with an increase in SDI of 28.07% and 15.76% in the 0 to 15 cm (0 to 5.9 in) depth and of 49.16% and 31% in the 15 to 40 cm (5.9 to 15.7 in) depth, respectively. The Cs-137 residual rate showed a corresponding relationship with the SDI changing trend, which implied that the Cs-137 residual rate may be considered an indicator for appraising soil quality for eroding hillslopes. It is suggested that the long-term practice of CT largely diminishes soil degradation because of upslope soil translocation; therefore, would also significantly improve soil quality in steeply sloping fields.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Ecology ; Soil Science ; Water Resources
研究领域[WOS]	Environmental Sciences & Ecology ; Agriculture ; Water Resources
关键词[WOS]	CHEMICAL-PROPERTIES ; LOESS-PLATEAU ; SICHUAN BASIN ; EROSION ; REDISTRIBUTION ; CHINA ; TERRACES ; SOC ; ACCUMULATION ; HILLSLOPES
收录类别	SCI
语种	英语
WOS记录号	WOS:000341853800013
公开日期	2014-09-09
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/7202]
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_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China 2.Minist Water Conservancy & Power, Chengdu, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Y.,Zhang, J. H.,Li, F. C.. Using Cesium-137 to investigate soil quality under conservation tillage on steep lands[J]. JOURNAL OF SOIL AND WATER CONSERVATION,2014,69(5):439-448.
APA	Wang, Y.,Zhang, J. H.,&Li, F. C..(2014).Using Cesium-137 to investigate soil quality under conservation tillage on steep lands.JOURNAL OF SOIL AND WATER CONSERVATION,69(5),439-448.
MLA	Wang, Y.,et al."Using Cesium-137 to investigate soil quality under conservation tillage on steep lands".JOURNAL OF SOIL AND WATER CONSERVATION 69.5(2014):439-448.