不同林分结构人工林皆伐后不同土层温度的变化

Temperature Change in Each Soil Layer in Plantation with Different Stand Structure After Clear-Cutting

在福建省选择具有代表性的2种林分结构人工林伐区进行试验,研究皆伐作业及不同迹地清理方式(火烧法、带堆法、散铺法)对林地表层(0～20 cm)土壤温度的影响。结果表明:皆伐后的林地表层土壤温度明显高于皆伐前,且温度变化大小与林分结构类型及迹地清理方式有关。针叶树(马杉混交林)林地的土壤温度变化大于阔叶树(桉树)林地;不同迹地清理方式对林地表层土壤温度变化的影响不同,其从大到小依次为火烧法>带堆法>散铺法。表层土壤(0～5 cm土层)温度受影响最大,随着土层深度的增大,不同类型土壤温度变化的差异逐渐减小。

The effect of different slash cleanup ways （prescribed burning, strip heaping and scattered paving） on the surface soil （0 -20cm） temperature change of clear cutting site of plantations with two types of typical stand structure in Fujian Province was studied. The results showed that the surface soil temperature of the felled woodland site was significantly higher than that of before the clear cutting, the amplitude of temperature change was related to stand structure and the slash cleanup methods The soil temperature change on the felling site of the coniferous plan- tation （ Pinus Massoniana mixed with Cunninghamia Lanceolatawas） was larger than that of on the felling site of the broad-leaved plantation of Eucalyptus sp.. The soil temperature change on the felling site was affected by the slash cleanup ways, the influence of the three types of slash cleanup ways on the soil temperature change of the felling site was ordered as prescribed burning 〉 strip heaping 〉 scattered paving. The temperature of 0 -5 cm top layer soil was most affected, and the difference in soil temperature change among the different slash cleanup ways de- creased gradually with the increment of soil depth.