摘要
采用双环入渗法 ,研究了黑龙江省东部山区落叶松人工林、樟子松人工林、水曲柳天然林、蒙古栎天然林和白桦天然林在不同的郁闭度、林分密度、枯枝落叶层厚度以及林内土壤初期含水量等条件下对土壤水分入渗速率的影响 ,结果表明 :林地土壤的水分入渗能力明显大于非林地 ,林地入渗率平均值是荒地的 3～ 4倍 ;不同林分类型林地土壤稳渗速率排序依次分别为蒙古栎天然林、白桦天然林、水曲柳天然林、樟子松人工林和落叶松人工林 ;土壤初始含水量大 ,达到稳渗的时间短 ,但稳渗率与初始含水量大无关 ;各林分土壤的水分入渗速率均随郁闭度和林分密度的增加而增加 ,其中以水曲柳天然林最为显著 ;阔叶林土壤入渗率有随枯枝落叶层厚度增加而增大的趋势 。
With the method of double-ring permeation, the effects of closure, stand density, layer of litter as well as the initial water content of soil on the soil moisture permeation rate have been studied in the typical forests such as larch plantation, Scots pine plantation, Manchurian ash secondary forest, Mongolian oak forest and birch natural stand in the eastern mountainous areas of Heilongjiang province. Results show that the ability of soil water permeation in forest land is higher than that in non-forest, which is 3～4 times of that on the wasteland. The order of the soil stable-permeation rates on the land of different forest types is Mongolian oak forest, birch natural stand, Manchurian ash secondary forest, Scots pine plantation and larch plantation. The higher the soil virgin moisture is, the quicker the permeation reaches the stable state, but the stable permeation rate has nothing to do with the virgin soil moisture. The permeation rates get increasing with the increase of closure and stand density in different forest types, and the most significant in Manchurian ash secondary forest. The influence of litter layer on permeation rate only presents that the permeation rate heightens with the increasing of the depth in the broadleaved forests.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2002年第5期24-26,共3页
Journal of Northeast Forestry University
