检索结果-南通市图书馆

Assessment of Soil erosion by compensatory Hoeing tillage in a Purple Soil

Journal of Mountain Science 2012年第1期9卷 59-66页

作者： SU Zhengan ZHANG Jianhui XIONG Donghong LIU Gangcai Key Laboratory of Mountain Hazards and Earth Surface Processes Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China Institute of Mountain Hazards and Environment Chinese Aeademy of SciencesChengdu 610041China

This study explores the role of a traditional tillage method,i.e.,compensatory hoeing,for sustainable agro-ecosystem management in the hilly areas of the Chongqing municipality,south-western *** validate the effects of compensatory tillage on the terraced slopes,the tillage method of noncompensatory hoeing was conducted on a linear *** acquire information about 137 cs inventories and soil texture,soil samples were collected by a core sampler with a 6.8-cm diameter at 5.0-m intervals along the toposequence and the linear slope in the dry season(March) of ***,a tillage erosion model was used for evaluating the spatial pattern of tillage *** 137 cs data showed that on the terraced slope,soil was lost from the upper slope,and soil deposition occurred at the toe slope positions on each *** a result,abrupt changes in the 137 cs inventories of soil were found over short distances between two sides of terrace *** obtained from the tillage erosion model and the 137 cs data indicate that soil redistribution mainly results from tillage erosion in the terraced *** non-compensatory tillage caused soil redistribution on the linear slope,resulting in thin soil profile disappearing at the top and soil accumulating at the bottom positions of the linear *** result further validates that compensatory tillage could avoid the complete erosion of the thin soil layer at the summit ***,this traditional ***,i.e.,compensatory tillage,has maintained the soil quality at the summit of the slope in the past decades.

关键词： compensatory tillage tillage erosion model 137 cs three gorges reservoir region china

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