柠条林土壤水分生态环境特征研究初报  

Study on Soil Water Ecological Environment of Artificial Caragana Korshinskii Bushwood

作　　者：王孟本[1] 李洪建[1] 

机构地区：[1]山西大学黄土高原地理研究所

出　　处：《中国科学院水利部西北水土保持研究所集刊》1989年第1期155-160,共6页

摘　　要：研究表明,柠条人工林对土壤有效水的利用率很高;土壤干湿季的成因及其水分动态特点,主要与柠条的物候期和气候的时段降雨量两者有关;土壤水分的垂直动态特征主要表现在120cm以下土层的水分含量骤减。土壤水分严重亏缺必然会对柠条林的生产力产生不良影响,但一般并不会使柠条林枯死。由于柠条林地的降水入渗率很高,因而可以在很大程度上减弱降水形成地面径流,有效地防止土壤侵蚀。营造柠条人工林可发挥其良好的生态作用。The analyse result shows that in the artificial Caragana korshinskii bushwood the use ratio of usable soil water is very high; the formation of soil dry season and soil damp season and their water dynamic characteristics are mainly related with the phenophases of Caragana korshinskii and the rainfall of the relevant period of time; and it is a main feature of the vertical change of soil water that there is a obvious decrease in water content of soil deep layer under 120 cm. Though serious water deficit in soil does exert the harmful effect on the productivity of the bushwood, it does not cause the bushwood to die. Because the ratio of infiltration of rainfall into soil is quite large, the bushwood can prevent erosion effectively. Planting Caragana korshinskii bushwood is mainly aimed at giving full play to its good ecological role.

关 键 词：土壤水分 土壤有效水 生态环境特征 防止土壤侵蚀 水分测定 人工林地 降水入渗 地面径流 动态特点 湿季 

分 类 号：S157[农业科学—土壤学]