| ECO-ENVIRONMENT CHANGE AND SOIL EROSION PROCESS IN THE RECLAIMED FORESTLAND OF THE LOESS PLATEAU |
| |
| 作者姓名： | ZHA Xiao-chun TANG Ke-li |
| |
| 作者单位： | 1. College of Tourism and Environment Science，Shaanxi Normal University，Xi'an 710062，P. R. China: 2. Institute of Soil and Water Conservation，Chinese Academy of Sciences and Ministry of Water Resources，Yangling 712100，P. R. China |
| |
| 基金项目： | UndertheauspicesoftheNationalNaturalScienceFoundationofChina(No. 19832060) |
| |
| 摘 要： | 1INTRODUCTIONSerioussoilerosionhasmadetheeco-environmentfragileintheLoessPlateau.InthemodernsoilerosionoftheLoessPlateau,theman-madeerosionwasthedominanterosionpattern (TANGetal.,1993a,1993b).Manyhumanactivitiesacceleratesoilerosion,butthemostinfluentialactivitiesaretodestroyforestandgrass,eventodestroyallvegetation.Reclamationbydestroyingforestlandandgrasslandartificiallycouldrapidlyincreasesoilerosionintensityinshorttimeandenlargeerosionspacegradually,evenchangeerosiondirectionandwor…
|
| 关 键 词： | 土壤侵蚀 黄土高原 再造林 生态环境保护 水土保持 |
| 收稿时间： | 24 October 2002 |
Eco-environment change and soil erosion process in the reclaimed forestland of the loess plateau |
| |
| ZHA Xiao-chun,TANG Ke-li.ECO-ENVIRONMENT CHANGE AND SOIL EROSION PROCESS IN THE RECLAIMED FORESTLAND OF THE LOESS PLATEAU[J].Chinese Geographical Science,2003,13(3):232-237. |
| |
| Authors: | Zha Xiao-chun Tang Ke-li |
| |
| Institution: | (1) College of Tourism and Environment Science, Shaanxi Normal University, 710062 Xi’an, P. R. China;(2) Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, 712100 Yangling, P. R. China |
| |
| Abstract: | Serious soil erosion has made the eco-environment fragile in the Loess Plateau. Based on the 10-year data observed from 1989 to 1998 in the Ziwuling Survey Station in loess hilly region, the eco-environment change and soil erosion process in reclaimed forestland were studied in this paper. The results showed that the intensity of man-made soil erosion caused by forestland reclamation was 1000 times more than that of the natural erosion. From the analysis of soil physical and mechanical properties, in the 10th year after forestland was reclaimed, the clay content and physical clay content decreased 2.74 percentage point and 3.01 percentage point respectively, the >0.25mm waterstable aggregate content decreased 31.59 percentage point, the soil bulk density increased and soil shear strength decreased, all of which were easier to cause soil erosion. The correlation analysis showed that >0.25mm waterstable aggregate content was the key factor affecting soil erosion, and the secondary factors were soil coarse grain and soil shear strength. The relation between the >0.25mm waterstable aggregate content, the soil sheer strength and the soil erosion intensity were analyzed, which showed that the first year and the seventh erosion year were the turn years of the soil erosion intensity after the forestland was reclaimed, revealed that the change of eco-environment was the main cause to accelerate soil erosion, and the worse environment caused soil erosion to be serious rapidly. |
| |
| Keywords: | loess hilly region reclaimed forestland soil erosion eco-environment change |
| 本文献已被 CNKI 万方数据 SpringerLink 等数据库收录！ |
