不同间伐抚育强度对华北落叶松人工林林下凋落物的影响研究

Effect and Research for Larix principis-rupprechtii Forest Under Litter in Different Tending Thinning Intensity

文章以塞罕坝地区华北落叶松人工林为研究对象,主要研究在不同间伐抚育强度下其林下凋落物的现存量和持水量的变化情况。试验选取立地条件和成林状况基本一致的林分进行研究,设置弱度、中度、强度3种不同程度的间伐抚育强度与未间伐抚育林分进行对比研究,研究结果发现:伐后林分凋落物现存量表现为未伐(6.747t/hm2)>弱度(6.209t/hm2)>中度(5.121t/hm2)>强度(3.922t/hm2),各林分持水量表现为未伐>弱度>中度>强度,依次是2.527t/hm2、2.218t/hm2、1.690t/hm2、1.251t/hm2,且均是半分解层大于未分解层,平均持水量与凋落物现存量表现趋势一致。

The article Takes Larix principis rupprechtii plantation in Saihanba area as the research object, changes of the forest litter biomass and water holding capacity in different tending and thinning intensity of the main research. Test and selec- tion of forest site conditions and forest conditions consistent research, weak, moderate intensity settings, 3 different degrees of tending and thinning intensity and not tending and thinning stands were studied, results showed that： after the cutting C;f forest litter fall mass is not thinning（6. 747t/hm2 ）〉light （6. 209t/hm2 ）〉middle （5. 121t/hm2 ）〉heavy（3. 922t/hm2） , The stand water holding capacity is not cutting 〉light〉middle 〉heavy, that is 2. 527 t/hm2 , 1. 690t/hm2 , 2. 218t/hm2 , 1. 251t/hm2 , and semi decomposed layer are greater than that of decomposition level, the average water holding capacity and litter biomass showed similar trends.