【摘要】 <正> 前文我们研究了长白山北坡森林生态系主要林型下土壤微生物的生态分布及土壤生物化学活性,结果表明,长白山分布最广而生产力最高的林型是灌木阔叶红松林。在这种林型下的土壤,不仅微生物数量最多,而且微生物种类也复杂,表现出的生物化学活性也强。森林凋落物,是森林土壤物质转化的物质基础,它在土壤中的分解,对于恢复和增加土壤肥力,改善树木营养和提高森林生产力,有着极为密切的关系。关于凋落物的分解在生物无机养分循环中的作用已有报道。本文旨更多还原

【Abstract】 The present paper deals with the result of the preliminary investigation on the microbiologicalproperties during the decomposition process of forest litters.The experiment was carried outunder laboratory condition.The emphasis was put on the relationships among material transfor-mation,microbiological dynamics and ability of soil metabolism during the decomposition.1.Thedecomposition rate and intensity of forest litters depended on their composition.In the treatmentwith addition of broad-leaves the decomposition rate was quicker than that in the treatment withaddition of the pine-needles.2.In the decomposition of forest litters the release of energy fromsoil and the cycle of nutrient substrates were related to the abundance and succession of soilmicroorganisms,the activities of soil enzymes,the intensity of oxidative metabolism and thechanges of sugar content in organic matter.3.In the carbon cycle of soil the changes of sugarcontent in organic residues and humic substance might be used to predict the direction of energyand material flows in soil ecosystem.更多还原