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作 者 ：梁晶；王庆成*；许丽娟；吴文娟

期 刊 ：植物研究 2015年 35卷 2期 页码：297-303

关键词：间伐抚育；间伐强度；凋落物；养分含量；碳密度；

Keywords:thinning treatment, thinning intensity, litter, nutrient content, carbon density,

摘 要 ：以长白山林区杨桦林和落叶松白桦林为研究对象，研究在不同间伐强度下林分凋落物积累和分解特征，研究土壤养分元素的变化规律，以及凋落物和土壤碳密度与间伐强度之间的关系。研究结果表明在不同的间伐强度条件下，杨桦林和落叶松白桦林凋落物积累量和分解量都有显著差别；凋落物养分含量随着间伐强度的增大都有降低的趋势；凋落物碳含量则随着间伐强度的增大而增大；土壤pH值随着间伐强度增大升高较明显；土壤容重和含水量受间伐影响较小；土壤含碳量随着间伐强度的增大呈现出先降低后增大的趋势，但是土壤碳储量密度则随着间伐强度的增大而减小。研究结果充分说明抚育间伐是影响林分凋落物分解以及土壤碳素积累的重要因素。鉴于本次研究设置间伐梯度较少，不能够充分判定适宜该地区研究林型间伐抚育的强度，因此在今后的研究中，应该增加间伐梯度设置，找到更加适宜的间伐强度，达到维持林分生长和碳素积累的营林目标。

Abstract:With poplar-birch stand and Larch-birch stand in Changbai Mountain, we studied two stands in three kinds of thinning intensity decomposition of forest litter accumulation and features, soil physical properties and change regularity of nutrient elements, and litter and soil carbon density and their relationships with the thinning intensity. Under different thinning intensity, there were significant differences in poplarbirch stand and larchbirch stand litter accumulation and decomposition rate. Litter nutrient content had a lower trend with the increase of thinning intensity. Litter carbon content increased with the increase of thinning intensity. Soil pH increased with the increase of thinning intensity obviously. Thinning affected the soil bulk density and the water content rate less. The soil carbon content reduced, and then increased with the increase of thinning intensity. The soil carbon density decreased with the increase of thinning intensity. Therefore, thinning is the main factors on litter decomposition and soil carbon accumulation.

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