中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地理科学与资源研究所
  3. 中国科学院地理科学与资源研究所
  4. 历年回溯文献
Determination of soil loss tolerance of an entisol in southwest china

文献类型：EI期刊论文

作者Liu Gangcai ; Li Lan ; Wu Laosheng ; Wang Genxu ; Zhou Zhonghao ; Du Shuhan
发表日期2009
关键词Groundwater Soil moisture Taxonomies Vegetation Weathering
英文摘要Soil loss tolerance (T value) serves as an ultimate criterion for determining if erosion control measures are necessary to preserve long-term soil productivity; therefore, it must be determined scientifically and rationally. In this study, soil formation rates (SR) of the purple soils (Entisols in the U.S. Soil Taxonomy and Regosols in the FAO soil classification) in the hilly area of Sichuan, China, were determined in field plots (measured SR) for three treatments: (i) soil type (J2s, J3s, and J3p soils) and parent materials or bedrock, (ii) vegetation (wheat [ Triticum aestivum L.]-maize [Zea mays L.], loquat tree [Eriobotrya japonica (Thunb.) Lindl.], and perennial ryegrass [Lolium perenne L.]), and (iii) soil depth (10, 20, 40, and 60 cm). The measured values were further used to test the applicability of the Barth equation (estimated SR) for the test soils. The measured SR varied among the treatments as a result of different characteristics of soil parent materials (PM) and different temperature and soil moisture at the interface between the soil and the parent materials. The trends (the order of increase or decrease) of measured and estimated soil formation rates were the same, however, for the soil type and vegetation treatments, but not for the soil depth treatments. The measured SR values were 800 Mg km-2 yr-1 for J3s purple soils and 1200 Mg km-2 yr-1 for J2s and J3p purple soils in the study region. The estimated SR values were closely related to runoff volumes but were substantially lower than the measured values. It was concluded that the Barth equation is not a reliable prediction model for estimating the soil formation rate for short-term and plot-scale observations. Therefore, T values should be determined by the measured SR values in the experimental region. © Soil Science Society of America.
出处Soil Science Society of America Journal
卷73期:2页:412-417
收录类别EI
语种英语
源URL[http://ir.igsnrr.ac.cn/handle/311030/24759]  
专题地理科学与资源研究所_历年回溯文献
推荐引用方式
GB/T 7714		 Liu Gangcai,Li Lan,Wu Laosheng,et al. Determination of soil loss tolerance of an entisol in southwest china. 2009.

入库方式： OAI收割

来源：地理科学与资源研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。