不同林型的紫色土酶活性和土壤肥力研究

Studies on Enzyme Activity and Fertilities of Purplish Soil for Different Forest Type

在福建省连城县紫色土分布区设立临时标准地,研究了毛竹林、杂木林、马尾松林、黑荆—马尾松林等不同林型紫色土的酶活性和土壤肥力,结果表明:不同林型紫色土的酶活性、土壤呼吸作用强度均比光板地高、土壤养分状况亦比光板地好,尤其是集约经营的毛竹林,土壤肥力较高,结构性和抗蚀性也较好,从而对紫色土壤肥力的保持起到良好作用。Q型群体分析表明,毛竹林土壤肥力较高,马尾松林、杂木林土壤肥力中等,黑荆—马尾松林、光板地土壤肥力较低。光板地营造马尾松—黑荆树混交林后,土壤酶活性和土壤肥力均得到一定程度的提高。这对紫色土侵蚀区生态系统的恢复和重建具有一定的指导意义。

Enzyme activity and fertilities of purplish soil for bamboo grove. broadleaf stands, pine stand. soil and water conservation forest and barrenland were studied in Liancheng county, Fujian province. The results show as follows: Enzyme activity, respiration intensity and amounts of nutrient of purplish soil for different forest type were all higher than that of barrenland, soil fertilities of inten- sive management. bamboo grove were relatively high especially, the soil structure property and anti- erodibility were fairly good, which had good affect to conserve fertilities for purplish soil. Q-type clus- ter analysis results showed that the fertilities of bamboo gruve were fairly high, the fertilities of pine stand and broadleaf stand were medium, and soil and water conservation forest and barrenland were relatively poor. Enzyme activity and fertilities were increase in a certain degree after planting mixed stand of pine and purplish soil erosion areas.