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通过土壤剖面取样法对川东北米仓山景区5种彩叶景观林土壤的速效N、P、K含量进行了初步研究。结果表明:速效N、P、K含量在5种彩叶景观林森林土壤剖面上具有明显的层次性,即腐殖质层高于淋溶层;除淋溶层速效K外,速效N、P、K含量分布特征为天然林高于人工林;天然林中,常绿落叶混交林高于针阔混交林。速效N、P、K含量在巴山水青冈林及其混交林中都高于米心水青冈林及混交林。研究揭示森林群落类型可能是影响米仓山彩叶景观林秋季土壤速效N、P、K含量的重要因子。
The soil available N, P and K contents of five color leafy landscape forests in the Micangshan Mountain Scenic Area in northeastern Sichuan were studied by soil profile sampling. The results showed that the contents of available N, P and K in the forest soil profile of five color leaf landscape forests were obviously different, that is, the humus layer was higher than that of the leaching layer. In addition to the available K of the leaching layer, available N, P and K The content distribution of the natural forest is higher than that of the plantation. In the natural forest, the evergreen and deciduous mixed forest is higher than the coniferous and broad-leaved mixed forest. The available N, P and K contents were higher in C. glauca forest and its mixed forest than C. mongolicus and mixed forest. The study revealed that the types of forest communities may be important factors that affect the soil available N, P, K contents of autumn in the Meiguan Mountains.