不同林地清理方式对土壤水分动态的影响

Effect of Different Clearances on Chinese Fir Forest Land Soil Moisture

通过对杉木林地不同清理方式土壤水分动态的四年定位研究表明:炼山不炼山通过不同方式处理迹地剩余物,导致了林地水分性质的较大差异。随时间推移,这种差异在缩小,至第四年,炼山、不炼山林地的水分性质仍未趋向一致。两种清理方式林地水分呈明显季节变化。可分为三个时期:林地蓄水期（2～6月）、林地失水期（7～10月）、林地水分稳定期（11～1月）,这一研究对于采取适宜措施、防止林地水土散失,提高林地的水分利用效率具有现实意义。

The moisture of Chinese fir forest land soil under different ground clearances has been studied for four years,with the result that there ares igni-ficant differences between the soil moisture of controlled burning and that of non-burning, that as time goes on the difference decreases, and that the saes-onal dynamic of soil moisture of different ground clearances is obvious, To improve the efficiency of water application, three phases of soil of different ground clearances have been designated.