文章基本信息

标题：Mechanisms for the retention of inorganic N in acidic forest soils of southern China
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作者：Jin-bo Zhang ; Zu-cong Cai ; Tong-bin Zhu 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
DOI：10.1038/srep02342
出版社：Springer Nature
摘要：The mechanisms underlying the retention of inorganic N in acidic forest soils in southern China are not well understood. Here, we simultaneously quantified the gross N transformation rates of various subtropical acidic forest soils located in southern China (southern soil) and those of temperate forest soils located in northern China (northern soil). We found that acidic southern soils had significantly higher gross rates of N mineralization and significantly higher turnover rates but a much greater capacity for retaining inorganic N than northern soils. The rates of autotrophic nitrification and NH₃ volatilization in acidic southern soils were significantly lower due to low soil pH. Meanwhile, the relatively higher rates of NO₃⁻ immobilization into organic N in southern soils can counteract the effects of leaching, runoff, and denitrification. Taken together, these processes are responsible for the N enrichment of the humid subtropical forest soils in southern China.