耕作侵蚀对紫色土坡耕地土壤容重和有机质二维分布的影响

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

	耕作侵蚀对紫色土坡耕地土壤容重和有机质二维分布的影响
	贾立志; 张建辉; 王勇; 张泽洪; 魏宇航
刊名	土壤通报
	2017
页码	DOI:10.19336/j.cnki.trtb.2016.00.00
关键词	耕作侵蚀模拟耕作土壤容重土壤有机质
ISSN号	0564-3945
通讯作者	张建辉
中文摘要	为了研究耕作侵蚀对坡耕地土壤容重、有机质以及两者相互关系的影响，选择四川盆地中部的简阳县的坡耕地作为研究对象，采用模拟耕作的方法，通过对比模拟耕作前与5次、20次模拟耕作之后的土壤容重、有机质的水平以及垂直变化与分布规律，并探讨耕作侵蚀对两者关系变化的影响规律。研究结果表明：由于耕作侵蚀的搬运作用，5次和20次耕作之后坡顶位置的表层土壤被不断搬运至下坡位置，从而导致坡顶表层土壤容重增加；并且耕作过程中锄头的翻转作用改变了土壤容重在垂直方向的分布。耕作前土壤有机质在各坡面位置的垂直分布可用对数方程描述，然而5次和20次耕作之后其两者之间没有显示任何关系。耕作前土壤有机质含量与土壤容重呈现显著的负相关关系，5次和20次耕作之后，土壤有机质和土壤容重之间无相关关系。因此，耕作侵蚀改变土壤有机质和容重在水平和垂直方向的分布并且改变有机质和容重之间的关系。
英文摘要	In order to ascertain the effect of tillage erosion on the distribution of soil buck density, organic matter and their relationship on steep hillslope, a slope farmland of Jianyang County in the eastern part of the Sichuan Basin was selected to be our experimental site. Then simulated tillage was conducted 5 and 20 times on the farmland to explore the effect of tillage erosion on the relationship between soil bulk density and soil organic matter (SOM) by comparing their distribution before and after simulated tillage. The results showed that after 5- and 20-operation tillage the topsoil at the summit positions was translocated to the lower slope positions because of the translocation of tillage. Soil bulk density of the topsoil layer at the summit increased after 5- and 20-operation tillage compared with pre-tillage due to the translocation of topsoils. What’s more, the overturning effect of hoeing tillage changed the vertical distribution of soil bulk density. Before simulated tillage, the vertical distribution pattern of SOM can be described by a logarithmic equation. However, the relationship of SOM to soil depth did not display any clear pattern after 5- and 20-operation tillage. Before simulated tillage, SOM concentrations decreased with increasing soil bulk density; however, such a negative relationship disappeared after 5- and 20-operations tillage. Our research showed that tillage erosion can not only change the horizontal and vertical distribution of SOM and soil bulk density, but also change the relationship between SOM and soil bulk density.
收录类别	CSCD
语种	中文
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17758]
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
推荐引用方式 GB/T 7714	贾立志,张建辉,王勇,等. 耕作侵蚀对紫色土坡耕地土壤容重和有机质二维分布的影响[J]. 土壤通报,2017:DOI:10.19336/j.cnki.trtb.2016.00.00.
APA	贾立志,张建辉,王勇,张泽洪,&魏宇航.(2017).耕作侵蚀对紫色土坡耕地土壤容重和有机质二维分布的影响.土壤通报,DOI:10.19336/j.cnki.trtb.2016.00.00.
MLA	贾立志,et al."耕作侵蚀对紫色土坡耕地土壤容重和有机质二维分布的影响".土壤通报 (2017):DOI:10.19336/j.cnki.trtb.2016.00.00.