华北地区针叶林下凋落物层化学性质的研究

森林凋落物中贮积了大量的有机、无机养分物质,它是森林土壤自然肥力的重要来源之一。在森林生态系统中,养分物质的内部循环主要是通过凋落物来实现的。在分解、转化过

Chemical Properties of Litter Layer Under Major Coniferous Forests in Northern China.

The chemical properties of litter layer under major coniferous forests in Northern China are studied. The results have been shown as follows. (1) significant difference has been found between chemical properties of L layer and F layer. Various mineral elements and coarse protein tend to be accumulated in F layer. (2) the content of inorganic, organic substances in litter layer and their properties vary significantly with different tree species. (3) the decomposition rate of litter is generally lower under coniferous forests. Large amount of nutrients, coarse protein and cellulose are detained in F layer. (4) within stands investigated, the hig hest decomposition rate of litter appears under Platycladus orientalis forest, and the lowest one appears under Picea wilsonii forest.