孝文山林场华北落叶松人工林凋落物及土壤养分含量分析

Analysis on Litter and Soil Nutrient Content of Larix Principis-rupprechtii Plantation in Xiaowenshan Forest Farm

在山西省关帝山国有林管理局孝文山林场以4种不同林分密度的华北落叶松人工林为研究对象,对其凋落物和土壤养分含量进行测定分析。结果表明,除林分密度为2250株/hm^(2)外,其他林分密度凋落物的全磷、全碳、全氮含量均随分解程度的增加而减少。不同林分密度下,土壤全磷、全碳、全氮、有机质含量随土层深度的变化规律不同。除全磷含量外,各林分密度的凋落物养分含量均高于土壤养分含量。土壤全碳含量和凋落物全磷含量,土壤全氮含量和凋落物全碳含量、全磷含量极显著相关;土壤和凋落物的全碳含量显著相关;凋落物和土壤其他养分含量间不存在显著相关性。

The litter and soil nutrient content of Larix principis-rupprechtii plantation with 4 different forest densities were measured and analyzed at Xiaowenshan Forest Farm of National Forest Administration Bureau of Guandi Mountain in Shanxi Province.The results showed that except for the forest density of 2250 plants/hm^(2),the total phosphorus,total carbon and total nitrogen contents of litter with other forest densities decreased with the increase of decomposition degree.Under different forest densities,the changes of total phosphorus,total carbon,total nitrogen and organic matter content in soil were different with soil depth.Except for the total phosphorus content,the nutrient content of litter in each forest density was higher than that in the soil.The total carbon content of soil and the total phosphorus content of litter,the total nitrogen content of soil and the total carbon and total phosphorus content of litter were extremely significant correlated.The total carbon content of soil and litter was significantly correlated.While there was no significant correlation among other nutrient contents in the litter and soil.