火烧对土壤性质的影响

Influences of Vegetation Burning on Soil Properties

火烧以后 ,土壤的各种性质会发生较大变化 ,原因是火向土壤中施加了热量、灰烬 ,并且改变了土壤环境和微气候 ,土壤性质也可因植被和生物活性的改变而发生相应的变化。本文对火烧后土壤生态系统中养分的浓度、有效性、迁移性 ,土壤中的生物和酶活性 ,土壤有机碳库等的变化进行了综合评述 ,以期为森林火灾、草地烧荒后的土壤管理等提供理论参考。

Soil properties can be affected by vegetation burning through input of heat and ash, and furthermore, the effect can lead to some changes in soil environment and microclimate. The changes can be attributed to subsequent modifications of vegetation and the activities of soil macro- and micro-organisms as well. This paper summarizes the potential influences of vegetation burning on nutrient concentrations,availability and mobility, activities of biomass and enzyme, and soil organic carbon pool in soil ecosystems. The main objective is to provide reference for soil management after forest fire or grassland burning.