重庆中梁山岩溶区耕作侵蚀影响因素研究  

Study on Influence Factors of Tillage Erosion in Karst Area of Zhongliang Mountain in Chongqing

作　　者：贾红杰[1] 傅瓦利[1] 赵俊丽[1] 张文晖[1] 甄晓君[1] 杜富芝[1] 马志敏[1] 段正锋[1] 

机构地区：[1]西南大学地理科学学院,重庆400715

出　　处：《水土保持学报》2008年第1期28-32,共5页Journal of Soil and Water Conservation

基　　金：国家科技支撑计划重大项目(2006BAC01A16);国家自然科学基金重点项目(40672165);重庆市科委项目(CSTC;2006EB1040)

摘　　要：在重庆市中梁山岩溶区用示踪法对坡耕地进行耕作试验研究。结果表明：锄头和铁锹耕作引起的土壤位移距离、位移量与坡度呈正相关，而踩锹引起的土壤位移距离、位移量则与含水量具有一定的相关性。在顺坡耕作时铁锹引起的土壤位移距离、位移量与锄头相近，但它们远远大于踩锹；等高耕作时铁锹引起的土壤位移距离、位移量是锄头的1．3～3．8倍左右。铁锹顺坡耕作引起的土壤位移距离、位移量是它等高耕作的2～2．4倍；锄头顺坡耕作引起的土壤位移距离、位移量是它等高的3～8．8倍。引起土壤位移量的大小顺序依次是：锄头顺坡〉铁锹顺坡〉铁锹等高〉锄头等高〉踩锹顺坡。Based on the study of tillage experiment with tracer method on sloping farmland in karst area of Zhongliang mountain in Chongqing city, the results showed： The mean soil displacement distance, soil translocation aroused by hoe and shovel tillage is closely related to slope gradient. Accepting the implement design and handling effect, the mean soil displacement distance, soil translocation by trample-shovel downslope tillage is to have certain correlativity with soil moisture. The soil displacement distance, soil translocation aroused by shovel downslope tillage has no difference with hoe＇s, and they are more bigger than trample-shovel＇s. Till the contour tillage, soil displacement distance, soil translocation of shovel is about 2.5 times of hoe＇s. Shovel mean soil displacement distance, soil translocation of downslope tillage is 2-2.4 times of contour tillage; the hoe＇s of downslope tillage is 3-8.76 times of contour tillage. The order Arousing soil translocation is： hoeing downslope tillage〉 shoveling downslope tillage 〉 shoveling contour tillage 〉 hoeing contour tillage 〉 trample-shovel downslope tillage. That karst area farming land breaks to pieces, the slope comparative short is the main cause of strong tillage erosion.

关 键 词：岩溶区 耕作侵蚀 顺坡耕作 等高耕作 重庆中梁山 

分 类 号：S157.1[农业科学—土壤学]