提高落叶松人工林林地质量的研究

文章采用森林生态系统定位研究的方法，从要地凋落物养分归还量，凋落物分解，土壤微生物数量变化以及土壤理化性质等方面，对落叶松人工林与人工落叶松天然白桦混交林的地力变化进行了综合的对比研究。

Study on Improving the Quality of Forest Land of Larch Plantations

Comparative research between artificial pure larch plantation and the mixed stand of artificial pure larch plantation and Asian white birch natural forest was comprehensively done according to the amount of nutrient returning from forest land litter, the litter decomposition, the change of soil microbe, the physical and chemical properties about soil etc.. The result shows that the mixed plantation of artificial pure larch plantation and Asian white birch natural forest can quicken the decomposition speed of larch litter, alleviate the contradiction between litter accumulation and litter decomposition, improve the environmental condition of forest land, increase the amount of soil microbe, therefore improve the quality of forest land and promote stand increment. The experiment testifies that the mixed needlebroad-leaf forest formed by the moderate tending of present pure larch plantation and introducing broad-leaf trees into the pure larch plantation can effectively prevent the soil degradation of pure larch plantation and realize the management objective of long-term preservation of soil fertility of larch plantation.