IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Effect of tillage erosion on the distribution of CaCO3, phosphorus and the ratio of CaCO3/available phosphorus in the slope landscape
Jia, L. Z.1,2,3; Zhang, J. H.1,2,3; Wang, Y.4; Zhang, Z. H.1,2,3; Li, B.5
Corresponding Author张建辉
2017
Source PublicationSOIL RESEARCH
ISSN1838-675X
EISSN1838-6768
Volume55Issue:7Pages:630-639
SubtypeArticle
Abstract

Little is known about the effect of tillage erosion on the distribution of CaCO3, phosphorus and changes in the ratio of CaCO3/available phosphorus (AP) in the hillslope landscape. The aims of the present study were to elucidate the mechanisms underlying changes in CaCO3 and AP concentrations induced by tillage erosion along slope transects and to reconstruct the historical changes in CaCO3 in soil layers at different landscape positions. Two adjacent slopes were selected from the Sichuan Basin, China, one with downslope tillage (Slope 1) and the other with upslope tillage (Slope 2) for 29 years. Then, consecutive downslope tillage by hoeing was applied five and 20 times on Slope 1. Under normal tillage (both downslope and upslope) conditions, CaCO3 concentrations increased exponentially with soil depth. However, the mixing effect of consecutive tillage (five and 20 tills) changed the vertical CaCO3 distribution patterns. For downslope tillage, the topsoil layer CaCO3 concentration was significantly lower at the toeslope than at other slope positions, but there were no significant differences between toeslope and other slope positions for upslope tillage. Consecutive tillage with five and 20 tills increased CaCO3 concentrations in the topsoil layer by 27.7% and 30.8% respectively compared with downslope tillage, but AP concentrations decreased by 26.1% and 29.0% respectively. Under normal tillage, AP concentrations decreased with increasing CaCO3 concentrations due to the adsorption and precipitation of AP by CaCO3, but this relationship disappeared after consecutive tillage. After consecutive tillage with five and 20 tills, the mean CaCO3/AP ratios of the topsoil layer were 93.5% and 88.4% greater than those for downslope tillage respectively, whereas there were no significant differences between downslope and upslope tillage. In conclusion, tillage is a process of CaCO3 replenishment and AP dilution in the surface layer of soil derived from carbonate-rich bedrocks.

; Little is known about the effect of tillage erosion on the distribution of CaCO3, phosphorus and changes in the ratio of CaCO3/available phosphorus (AP) in the hillslope landscape. The aims of the present study were to elucidate the mechanisms underlying changes in CaCO3 and AP concentrations induced by tillage erosion along slope transects and to reconstruct the historical changes in CaCO3 in soil layers at different landscape positions. Two adjacent slopes were selected from the Sichuan Basin, China, one with downslope tillage (Slope 1) and the other with upslope tillage (Slope 2) for 29 years. Then, consecutive downslope tillage by hoeing was applied five and 20 times on Slope 1. Under normal tillage (both downslope and upslope) conditions, CaCO3 concentrations increased exponentially with soil depth. However, the mixing effect of consecutive tillage (five and 20 tills) changed the vertical CaCO3 distribution patterns. For downslope tillage, the topsoil layer CaCO3 concentration was significantly lower at the toeslope than at other slope positions, but there were no significant differences between toeslope and other slope positions for upslope tillage. Consecutive tillage with five and 20 tills increased CaCO3 concentrations in the topsoil layer by 27.7% and 30.8% respectively compared with downslope tillage, but AP concentrations decreased by 26.1% and 29.0% respectively. Under normal tillage, AP concentrations decreased with increasing CaCO3 concentrations due to the adsorption and precipitation of AP by CaCO3, but this relationship disappeared after consecutive tillage. After consecutive tillage with five and 20 tills, the mean CaCO3/AP ratios of the topsoil layer were 93.5% and 88.4% greater than those for downslope tillage respectively, whereas there were no significant differences between downslope and upslope tillage. In conclusion, tillage is a process of CaCO3 replenishment and AP dilution in the surface layer of soil derived from carbonate-rich bedrocks.
KeywordConsecutive Tillage Normal Tillage
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1071/SR16077
URL查看原文
WOS Subject ExtendedAgriculture
Indexed BySCI
WOS KeywordSOIL ORGANIC-CARBON ; CALCAREOUS SOILS ; LAND-USE ; MICROBIAL BIOMASS ; STEEP HILLSLOPE ; SICHUAN BASIN ; REDISTRIBUTION ; WATER ; POSITION ; MATTER
Language英语
Quartile4区
TOP
WOS SubjectSoil Science
WOS IDWOS:000412311900002
Funding OrganizationNational Natural Science Foundation of China(41571267 ; Key Scientific and Technological Program of China National Tobacco Corporation Sichuan Branch(SCYC201504) ; 41271242)
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18708
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, 9 Sect 4,South Renmin Rd, Chengdu 610041, Peoples R China
2.Minist Water Conservancy & Power, 9 Sect 4,South Renmin Rd, Chengdu 610041, Peoples R China
3.Univ Chinese Acad Sci, Yuquan Rd, Beijing 100049, Peoples R China
4.Sichuan Agr Univ, Coll Water Conservancy & Hydropower Engn, 46 Xinkang Rd, Yaan 625014, Peoples R China
5.China Natl Tobacco Corp, Sichuan Branch, 936 Century City Rd, Chengdu 610000, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Jia, L. Z.,Zhang, J. H.,Wang, Y.,et al. Effect of tillage erosion on the distribution of CaCO3, phosphorus and the ratio of CaCO3/available phosphorus in the slope landscape[J]. SOIL RESEARCH,2017,55(7):630-639.
APA Jia, L. Z.,Zhang, J. H.,Wang, Y.,Zhang, Z. H.,&Li, B..(2017).Effect of tillage erosion on the distribution of CaCO3, phosphorus and the ratio of CaCO3/available phosphorus in the slope landscape.SOIL RESEARCH,55(7),630-639.
MLA Jia, L. Z.,et al."Effect of tillage erosion on the distribution of CaCO3, phosphorus and the ratio of CaCO3/available phosphorus in the slope landscape".SOIL RESEARCH 55.7(2017):630-639.
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