垦殖橡胶对海南热带土壤有机碳的影响

The Effects of Land Use on the Soil Organic Carbon and Aggregate Content of Soil in Hainan

通过对海南屯昌县天然次生林和不同种植历史的橡胶林土壤有机碳含量的分析,研究了海南热带天然次生林转变为橡胶以及橡胶不同种植历史对土壤有机碳含量的影响。研究结果表明,天然次生林开垦后种植橡胶林造成了土壤剖面中第二层(10￣20cm)有机碳含量的显著减少,第一、三、四层(分别为0￣10cm,20￣50cm,50￣100cm)都有所减少,但不显著;由天然次生林变成橡胶林是造成土壤有机碳的含量有显著差异的主要原因,橡胶林种植历史对土壤有机碳含量的影响不显著。

The effects of land use changed from natural secondary forests to rubber forests and rubber planted history on soil organic C were studied by analyzing the content of natural secondary forests and rubber forests soil organic C in Tunchang county, Hainan province. The results showed that soil organic C content decreased significantly within soil depth of the 10-20 cm after natural secondary forests were destroyed and rubber forests were planted, soil organic C content decreased within soil depth of the 0-10 cm, 20-50 cm and 50-100 cm ,but not significant; the mainly factors that cause soil organic C changed remarkably were land use changed from natural secondary forests to rubber forests, not rubber forests history.