作物植被的保土作用及作用系数  

Soil Conservation and Coefficient of Soil Conservation of Crops

作　　者：刘秉正[1] 刘世海[1] 郑随定 

机构地区：[1]西北林学院

出　　处：《水土保持研究》1999年第2期32-36,113,共6页Research of Soil and Water Conservation

摘　　要：坡耕地种植作物能形成地表覆盖，具有一定的保土功能，其保土原理是作物密度大，地表微起伏和根系的固土作用。保土作用受覆盖度、地形、降雨等影响；用保土作用系数（Ｃ）衡量，仅与覆盖度有关。在黄土高原南部，Ｃ变化在０．１１～０．８６间，因而，提高坡耕地作物植被的保土功能，还需加其它管理措施。Crops in cultivated land can cover soil surface so as to conserve soil because of high crops' density, coarse in ground and crops' roots. Soil conservation were affected by crop cover, microtopography and rainfall. The coefficient of soil conservation was only related to crop cover. Ranges of C value was from 0.11 to 0.86. Therefore, increase of soil conservation by planting crops in the gentle slope land also required other management measrues.

关 键 词：作物植被 保土作用 作用系数 

分 类 号：S157.433[农业科学—土壤学] S157[农业科学—农业基础科学]