【摘要】 本文对油松人工林生态系统乔木层、下木层、草本层、枯枝落叶层和土壤中营养元素含量进行了较为系统的研究.分析讨论了营养元素在油松各器官中含量的变化规律,探讨了不同坡位树体的枝和叶中营养元素含量的差异.研究结果对油松林的经营有一定的指导意义.更多还原

【Abstract】 A systematic study has been made on contents of nutrient elements in the tree stratem,underroof layer,herb layer,litter layer and soil of a Pinus tabulaeformis plantation e- cosystem.The variations of nutrient element contents in each organ have been analysed and those of nutrient element contents in the branches and leaves of trees at different positions on slope have been discussed as well.The results can be a guide to manage Pinus tabulaeformis forests.更多还原