摘要
在岩溶山区采用示踪法证实了锄耕会引起耕作侵蚀。实验结果表明：岩溶山区单次耕作土壤的最大位移距离为1m左右；土壤平均位移距离0．2053～0．2982m，土壤位移量为42．364～61．534kg／m；耕作侵蚀速率为141．21～205．11t／hm^2，平均侵蚀速率为162．85t／hm^2；它们都受坡度的影响，而且在相同坡体长度下，都随地块坡度的增加而递增。地块面积较小、坡体较短，地块破碎是岩溶山区土壤耕作侵蚀严重的重要原因。本文还结合岩溶山区特殊的自然环境条件，提出了加强岩溶山区土壤耕作侵蚀研究的必要性和重要意义。
The direct evidences of tillage erosion by hoeing plough in karst area are obtained nique. The test proves that tillage translocation rates range from 42. 364 to 61. 534 kg/m,the mean displacement distances range from 0. 2053 to 0. 2982m,and tillage erosion rates reach 141.21 to 205.11t/hm^2,mean tillage erosion rate is 162. 85 t/hm^2. They are all affected by slope,and they all increase with the farmland slope even under same slope length. The major reasons for the seriously tillage erosion are that the area of single farmland being too small, the slope body comparatively short and the patches of farmland too dispersed. By combining the special natural conditions in karst mountain area,the necessity and importance in strengthen the research on soil tillage erosion is put forward.
出处
《中国岩溶》
CAS
CSCD
北大核心
2006年第2期152-156,共5页
Carsologica Sinica
基金
国家自然科学基金重点项目(40231008)
西南师范大学博士基金(2003-18)
关键词
岩溶山区
土壤侵蚀
耕作侵蚀
耕作位移
Karst mountain area
Soil erosion
Tillage erosion
Tillage translocation
