森林土壤氮素的岩矿来源及其重要性

Mineral Rocks as an Important Source of Nitrogen for Forest Soil

氮素是植物必要的营养元素之一,其主要来源有:生物固氮作用、降雨和灌溉水以及人工施肥。但由于岩矿中氮素含量低而分散,一般不视为植物氮素给源。作者认为,如果做好水土保持,实行混交,则岩矿中氮应视为森林土壤重要的氮源。

Nitrogen for plant nutrition is mainly obtained from three sources: nitrogen-fixing plant, rain water and manure. Nitrogen in mineral rocks is genually neglected because its content is very low and is irregularly distributed. However, if certain measures are taken to do forestland's best soil and water conservation, and the cohabitation of conifers and broad-leaved trees, nitrogen in mineral rocks can be utilized to play an important role in tree nutrition.