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首页> 外文期刊>Plant and Soil >Litter decomposition and nitrogen mineralization of soils in subtropical plantation forests of southern China, with special attention to comparisons between legumes and non-legumes
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Litter decomposition and nitrogen mineralization of soils in subtropical plantation forests of southern China, with special attention to comparisons between legumes and non-legumes

机译：南方亚热带人工林土壤的凋落物分解和氮矿化作用，特别是豆科植物和非豆科植物的比较

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摘要

Litter decomposition and nitrogen mineralization were investigated in subtropical plantation forests in southern China. The CO2 –C release from incubated litter and the forest floor of Acacia mangium, Acacia auriculaeformis, Eucalyptus citriodora, Pinus elliotii and Schima superba stands were used to estimate relative rates of litter decomposition. Decomposition was not positively correlated with litter nitrogen. E. citridora litter decomposed most rapidly and A. mangium litter most slowly, both with and without the addition of exotic nitrogen. Aerobic incubation and intact soil core incubation at 30 °C over a period of 30 days were used to assess nitrogen mineralization of six forest soils. Although there were differences in results obtained using the two methods, patterns between legume and non-legume species were the same regardless of method. All soils had pH values below 4.5, but this did not prevent nitrification. The dominant form of mineral nitrogen was nitrate for legume species and ammonium for non-legume species. The nitrogen mineralization potential was highest for soils in which legumes were growing.
机译：在中国南方的亚热带人工林中调查了凋落物分解和氮矿化作用。用孵化的凋落物和马占相思，金合欢，柠檬桉，松果和荷叶林的林地中的CO2 -C释放量来估算凋落物相对分解率。分解与凋落物氮没有正相关。无论是否添加外来氮，E。citridora凋落物分解最快，而A. mangium凋落分解最慢。在30°C下进行30天的有氧培养和完整土壤核心培养，以评估6种森林土壤的氮矿化作用。尽管使用这两种方法获得的结果有所不同，但无论采用哪种方法，豆类和非豆类物种之间的模式都相同。所有土壤的pH值均低于4.5，但这不能阻止硝化作用。矿物质氮的主要形式是豆类物种的硝酸盐和非豆类物种的铵。对于生长豆类的土壤，氮矿化潜力最高。

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