Gross nitrogen mineralization rates still high 14 years after suspension of N input to a N-saturated forest
Gross nitrogen mineralization rates still high 14 years after suspension of N input to a N-saturated forest
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DOI：
10.1016/j.soilbio.2005.11.026
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发表时间：
2006-07-01
影响因子：
9.7
通讯作者：
Hogberg, Peter
中科院分区：
文献类型：
--
作者：
Chen, Yu;Hogberg, Peter
中欧、美洲东北部和东亚的温带森林的大部分地区吸收了大量的氮沉降。根据现有的少数研究，氮负荷的暂停会导致土壤无机氮和氮淋溶在几年内减少。我们报告说，令人惊讶的是，在之前> 100公斤氮/公顷的氮负荷暂停20年之后的14年，氮仍然以高速率矿化。在该处理中，总氮矿化率比对照地块高出 3 倍，但与仍在进行的（34 年）30 和 60 千克氮/公顷处理中的处理相当，其中可提取的 NH4+ 水平高出 10 倍。 (c) 2006 Elsevier Ltd. 保留所有权利。
Significant areas of temperate forests in Central Europe, NE America and E Asia receive high amounts of N deposition. According to the few studies available, suspension of the N load leads to reductions in both inorganic soil N and leaching of N within a few years. We report that, surprisingly, N is still mineralized at high rates 14 yr after suspension of a previous N-load of > 100 kg N/ha yr for 20 yr. In this treatment, gross N mineralization rates exceeded those in control plots by a factor 3, but equaled those in still on-going (34 yr of) treatments with 30 and 60 kg N/ha yr, in which levels of extractable NH4+ were up to 10 times higher. (c) 2006 Elsevier Ltd. All rights reserved.