抚育间伐对燕山北部山地林内小气候的影响  

Effects of thinning on forest microclimate in northern region of Yanshan Mountain

作　　者：李亚男[1,2] 许雪飞[3] 许中旗[1,2] 王丽[1] 

机构地区：[1]河北农业大学林学院,河北保定071000 [2]河北省林木种质资源与森林保护重点实验室,河北保定071000 [3]河北省木兰围场国有林场管理局,河北围场068400

出　　处：《中南林业科技大学学报》2015年第11期121-127,共7页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业科研专项(200804027-07;20100400205)

摘　　要：为了探讨抚育间伐对林分小气候的影响，对燕山北部山地人工落叶松林和天然次生杨桦林的间伐区和未间伐区的林下照度、林内温度、空气相对湿度及不同深度的土壤温度进行了测定。结果表明：间伐区林分的林下照度明显大于未间伐区，前者为后者的4～5倍；间伐区浅层土壤温度明显大于未间伐区，间伐区与未间伐区土壤温度的差异随着土壤深度的增加而逐渐减小，15 cm以下土壤温度的差异消失；间伐区的林内气温与未间伐区没有明显差异；林内的空气相对湿度日进程呈“V”字型，间伐区和未间伐区之间空气相对湿度差异不明显。由此得出结论，抚育间伐对林分内的光照强度及浅层土壤温度有明显影响，并将对林分更新、林下植被发育及林地土壤的生物地球化学过程产生深远影响。In order to study the effects of forest thinning on forest microclimate, the forest inner light intensity, air temperature, air relative humidity, temperature of different depth soils （0, 5, 10, 15 and 20 cm） from 2011 to 2012 were measured in the thinning area and un-thinning area of artiifcial Larch and natural secondary poplar and birch forests in northern region of Yanshan mountain, Hebei province. The results show that the light intensity in the thinning forests was markedly higher than that of the un-thinning forests, that of the former was 4 to 5 times of the latter. The shallow soil temperature of the thinning zone was signiifcant greater than that of un-thinning, the differences of the two zones were gradually diminished with the increase of soil depth, between the thinning area and not thinning area, and under 15 cm soil layer, the soil temperature differences disappeared. There was no distinct difference in air temperature between the thinning forest and un-thinning forest. The diurnal course of air relative humidity was like a V-shaped, there are no markedly difference in relative air humidity between the thinning forest and un-thinning forest. It is concluded that thinning have impacts on the forest inner illumination intensity, shallow soil temperature of forests and it is implied that thinning will have a profound impacts on forest regeneration, understory vegetation development and biogeochemical cycles of the forests.

关 键 词：林分小气候 抚育间伐 林内照度 土壤温度 相对湿度 

分 类 号：S718.512[农业科学—林学]