The interactions between plant growth, vegetation structure and soil processes in semi-natural acidic and calcareous grasslands receiving long-term inputs of simulated pollutant nitrogen deposition
The interactions between plant growth, vegetation structure and soil processes in semi-natural acidic and calcareous grasslands receiving long-term inputs of simulated pollutant nitrogen deposition
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DOI：
10.1016/s0269-7491(02)00241-5
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发表时间：
2003-01-01
影响因子：
8.9
通讯作者：
Lee, JA
中科院分区：
文献类型：
--
作者：
Carroll, JA;Caporn, SJM;Lee, JA
定期施用硝酸铵（35-140公斤氮公顷（-1）年（-1））和硫酸铵（140公斤氮公顷（-1）年（-1）），在德比郡峰区的酸性和石灰质草原地区，在6年的时间内，已导致显着损失的总植物覆盖，和丰富的个别物种，与明确的和剂量相关的增加，在拍摄氮含量。在实验的任何阶段都没有看到对氮处理的总体生长反应。然而，磷添加到石灰性地块导致显着增加植物覆盖和总生物量，磷限制在这个系统中的指示。土壤氮矿化率也得到了明确的和剂量相关的增加，与显着影响的氮添加剂对土壤过程一致。在石灰质地块上观察到高硝化率，这一过程与140 kg N ha（-1）年（-1）处理的显著酸化有关。(C)2002爱思唯尔科技有限公司版权所有。
Regular applications of ammonium nitrate (35-140 kg N ha(-1) year(-1)) and ammonium sulphate (140 kg N ha(-1) year(-1)) to areas of acidic and calcareous grassland in the Derbyshire Peak District over a period of 6 years, have resulted in significant losses in both overall plant cover, and the abundance of individual species, associated with clear and dose-related increases in shoot nitrogen content. No overall growth response to nitrogen treatment was seen at any stage in the experiment. Phosphorus additions to the calcareous plots did however lead to significant increases in plant cover and total biomass, indicative of phosphorus limitation in this system. Clear and dose-related increases in soil nitrogen mineralization rates were also obtained, consistent with marked effects of the nitrogen additions on soil processes. High nitrification rates were seen on the calcareous plots, and this process was associated with significant acidification of the 140 kg N ha(-1) year(-1) treatments. (C) 2002 Elsevier Science Ltd. All rights reserved.