The Solling roof project - site characteristics, experiments and results
The Solling roof project - site characteristics, experiments and results
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DOI：
10.1016/s0378-1127(97)00143-6
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发表时间：
1998-02-01
影响因子：
3.7
通讯作者：
Xu, YJ
中科院分区：
文献类型：
--
作者：
Bredemeier, M;Blanck, K;Xu, YJ
本文报道了在德国中部塞尔林进行的屋顶试验结果。一个'干净的雨'操作研究和干旱/复湿实验并排运行在一个60岁的挪威云杉（云杉喀斯特。）结果是在一个综合的，跨学科的方式，包括土壤水化学，根系生长，地上部分的反应。在S、N输入削减较强的清雨试验中，土壤水化学的时间响应顺序为根系生长>地上部反应。硝酸盐淋溶在相当短的时间内（操作开始后1-2年）有效地降低到非常低的水平。在干旱/复湿实验中，诱导干旱胁迫对云杉林分地上部分参数的影响最强，最快。生长和光合能力降低，而细根生长反应冷淡。结果表明：酸性土壤上云杉林的大气元素输入在很大程度上控制着土壤溶液化学和输出;通过严格的大气污染控制措施，这种生态系统类型中的氮饱和度可以逆转;云杉林对化学环境变化的响应具有时滞性，但对干旱胁迫的响应迅速。(C)1998年Elsevier Science B.V.
The results from roof experiments in the Selling forest in central Germany are reported. A 'clean rain' manipulation study and a drought/rewetting experiment are run side by side in a 60-year-old Norway Spruce (picea abies KARST.) stand. The results are presented in an integrated, interdisciplinary manner and comprise soil water chemistry, root growth, and aboveground stand response. In the clean rain experiment with strong input reduction of S and N a temporal response sequence of soil water chemistry --> root growth --> above-ground reaction occurs. Nitrate leaching is efficiently turned down to very low levels on rather short-term (1-2 yr after start of manipulation). In the drought/rewetting experiment the effects of induced drought stress are strongest and quickest on the above-ground parameters of the spruce stand. Growth and photosynthetic capacity are reduced, while fine root growth reacts indifferently. It may be concluded from the results that: in spruce forests on acid soil atmospheric element input largely controls soil solution chemistry and output; N saturation may be reversed in such ecosystem types by strict air pollution control measures and that spruce forests exhibit a time-lagged response to a changing chemical environment, but rapid responses to drought stress. (C) 1998 Elsevier Science B.V.