杉木人工林土壤水分动态研究

采用小集水区试验方法，利用定位观测的数据，对亚热带杉木人工林的土壤水分动态进行了研究。结果表明，杉木人工林土壤水分的周年变化，主要受月降雨量、前期降雨量、温度、湿度的影响，可划分为蓄墒、失墒、平稳３阶段。

A STUDY ON DYNAMIC VARIETY OF SOIL MOISTURE BY ARTIFICIAL JAMMING IN A CHINESE FIR PLANTATION

On the basis of data collected from located observations by using small watershed technique. a study was made on the dynamic variety of soil moisture by artificial jammingin a Chinese fir plantation in the subtropical fegion Results show that the yearly variety of soil moisture is affected mainly by monthly precipitation. preceding precipitation.temper ature and humidity. and the yeady varicty can be divided into soil moisture storage ,soil moisture loss and soil moisttire stability. Average soil water content is found reduced respectively 20. 9 mm and 24.6 mm after selection cutting and clear cutting with a lower range of alteration. while the soil water retaining capacity cuts down respectively about 15. 6%and 29.5%.but clear cutting greatly increases soil permeability.