风干、烘干对不同热带森林土壤样品NH_4-N、NO_3-N测定结果的影响

Variations of Contents of NH_4-N、NO_3-N in Three Tropical Forest Soils During

采用野外采样及室内测试分析方法,研究了风干、烘干对西双版纳3种不同热带森林(季节雨林、人工林、次生林)0—15m土壤NH4-N、NO3-N测定结果的影响。结果表明,人工林和次生林NH4-N含量表现为:新鲜土<风干土<烘干土,而季节雨林则略有不同:新鲜土<烘干土<风干土;新鲜土和风干土NO3-N含量差异均不显著,但新鲜土和风干土NO3-N含量均显著高于烘干土。

Variation of contents NH4-N、NO3-N in three tropical forests (seasonal rainforest, artificial forest, secondary forest) soil samples (0—15cm) during air-drying and heat-drying was investigated. The results showed that contents of NH4-N in the forest soil were lower than that of air-dried and heat-dried soils under three tropical forests (p<0.01). The contents of NO3-N in the heat-dried soils were lower than the fresh soils and air-dried soils (p<0.01). There were no significant changes between the contents of NO3-N in the fresh soils and air-dried soils (p>0.05).