松材线虫危害后马尾松林土壤氮素的矿化特性

选择合肥大蜀山森林公园受松材线虫危害程度不同的马尾松林为研究对象,采用室内模拟试验对林氮素的转化性质,增加了土壤氮素淋失的危险性。地土壤氮素矿化特征进行了研究。结果表明:不同林分土壤氮素转化速率差异显著(P<0.05),受损严重的林分氮素矿化速率显著高于轻度受损林分,特别是硝化速率更为显著(P<0.01)。松材线虫病危害改变了马尾松林土壤

Soil Nitrogen Mineralization in Pinus massoniana Stands After Disturbance by Pine Wilt Disease

Masson pine stands after different degrees of damage by pine wilt disease in Shushan Forest Park were selected to investigate the changes in soil nitrogen mineralization using the laboratory incubation method.Result showed that a significant change in nitrogen mineralization occurred in the pine stands after disturbance by pine wilt disease(at the 0.05 level).The stands seriously damaged exhibited a significantly higher rate of nitrogen mineralization,especially nitrification,compared with the stands slightly damaged.The disturbance by pine wilt disease resulted in a significant change in soil nitrogen mineralization,with an obvious increase in nitrification rate(at the 0.01 level),which suggests a high potential for nitrogen leaching in the damaged stands.