论文部分内容阅读
对马尾松林下混交火力楠、红叶树、木荷林分及马尾松纯林土壤肥力的测定结果表明：不同混交林分年凋落量有明显差异；成林马尾松混交阔叶树后，林地土壤水分状况、孔隙状况、土壤结构及渗透性能均得到不同程度的改善，而且林地表层土壤养分含量增加，土壤酶活性加强。不同混交林分改良土壤肥力效果排序为：混交火力楠林分＞混交红叶树林分＞混交木荷林分＞马尾松纯林。其中马尾松林下混交火力楠是值得推广的新造林模式。
The results of soil fertility test showed that there was a significant difference in the annual litterfall of Pinus massoniana, Conifer tree, Muhelin and Pinus massoniana pure plantation. After mixed Pinus massoniana forest, the soil water status , Pore conditions, soil structure and permeability have been improved to varying degrees, and the nutrient content of forest surface soil increased, soil enzyme activity strengthened. The order of soil fertility improvement by different mixed forest stands is as follows: Nanning> Firewood> Mixed Hongye Shulin> Mixed Muhelin> Pure Masson. Among them, Pinus massoniana mixed fire Nan is worth promoting the new afforestation model.