阔叶红松林合理经营与土壤微生物活性

Rational Management of Broadleaved Korean Pine Forest and Activities of Soil Microorganism.

森林是可再生的自然资源,研究证明,阔叶红松林具有很高的生产力,因为它具有最优化的林分结构,这个结构特点,使它的复层异龄和针阔混交的群落结构影响下的土壤肥力较高,土壤微生物类群复杂,活动活跃,森林有机残体的分解与转化较快。系统内的氮、碳及无机养分的循环,能满足林木生长对养分不断增长的需要。系统内各个生态因子处于动态平衡状态。因此。

The effects of clear and selective cuttings on soil microorganism, soil enzyme activity and nitrogen metabolisms were investigated. A 30% intensity of selective cutting made an increase of the activities of soil microorganisms which favoured the biological cycling of nutrient elements through the decomposition of litterfall. Under conditions of clear cutting and overcutting, as a result of the stimulated decemposition and nitrification, nutrient losses to streams, particularly in the form of nitrate may lead.