皆伐与不同迹地清理方式对我国南方林地土壤温度的影响

Effects of Clear-cutting and Slash Disposal Methods on Soil Temperature on the Harvested Site

采用土壤温度测试仪分别对火烧法和散铺法2种南方常用迹地清理方式清理后的林地表层（0-20 cm）土壤温度的变化情况以及皆伐前后土壤温度的变化情况进行实测。结果表明：皆伐后的林地表层土壤温度明显高于皆伐前的土壤温度,且两者差别大小与迹地清理方式有关。不同迹地清理方式,林地表层土壤温度有明显的差异,在相同条件下,火烧法的土壤温度高于散铺法,尤其在0-5 cm的土层温度差别最显著,最大相差5-10℃。随着土层深度的增大,土壤温度变化的差异逐渐减小。

The changes of surface soil temperature of forest land（soil depth 0-20 cm） after two ways of slash clearance commonly used in the south,such as burning method and spreading method,as well as the changes before and after clear-cutting were respectively measured with soil temperature tester.The results showed that the soil temperature after clear-cutting was significantly higher than that before.And the difference of this change was much related to the way of slash clearance,in the evidence that the soil temperature after burning was higher than that of dispersion method when measured in the same conditions,especially in the soil depth of 0-5 cm,with maximum difference of 5-10℃.With the increase of soil depth,the difference of soil temperature changes decreased.