The effect of tree species diversity on phosphorus availability and cycling
树种多样性对磷有效性和循环的影响
基本信息
- 批准号:192964587
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Units
- 财政年份:2011
- 资助国家:德国
- 起止时间:2010-12-31 至 2013-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The maintenance of soil fertility through species diverse forests might be an important ecosystem service in tropical regions with their large areas of forest plantations. Preliminary investigations at the Comparative Study Plots of BEF China have shown, that soil P concentrations are very low, a large proportion of available P is in organic from, and that many of the species show of leaf and litter P concentrations that are indicative P limitation. However, the high variation of P tissue concentrations points to a variety of species-specific mechanisms to adopt to limited P supply. Given the large range of biologically available soil P compounds, and the variety of mechanisms by which plants can access P, we assume that co-existing plant species partition soil organic P to reduce competition. Based on this we hypothesize that (a) the proportion of soil P in available fractions increases with increasing tree species diversity of plots, (b) neighbourhood tree species diversity affects soil P fractions and nutrition of individual trees, and (c) effects of tree species diversity on productivity decline (complementarity reduction) with decreasing diversity of soil organic P sources. In addition, we will explore whether the different soil P fractions can be distinguished on the basis of their spectral properties, which would greatly reduce analytical efforts.
通过物种多样性森林保持土壤肥力,可能是热带地区大面积种植林的重要生态系统服务。在中国生物多样性论坛比较研究区的初步调查表明,土壤磷含量很低,大部分有效磷以有机形式存在,许多物种的叶和凋落物磷含量显示出磷限制。然而,磷组织浓度的高变化指向各种物种特异性的机制,以采取有限的磷供应。鉴于大范围的生物可利用的土壤磷化合物,和各种机制,植物可以访问P,我们假设共存的植物物种分区土壤有机磷,以减少竞争。在此基础上,我们假设:(a)土壤P在有效态中所占比例随样地树种多样性的增加而增加;(B)相邻树种多样性影响土壤P的形态和单株养分;(c)树种多样性对生产力的影响随土壤有机P源多样性的降低而降低(互补性降低)。此外,我们将探讨是否可以区分不同的土壤磷组分的基础上,他们的光谱特性,这将大大减少分析工作。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Professor Dr. Jürgen Bauhus其他文献
Professor Dr. Jürgen Bauhus的其他文献
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{{ truncateString('Professor Dr. Jürgen Bauhus', 18)}}的其他基金
The influence of structural, functional, and species diversity to temporal stability of productivity and efficiency of resource use in a tropical tree diversity experiment
热带树木多样性实验中结构、功能和物种多样性对生产力和资源利用效率的时间稳定性的影响
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429809294 - 财政年份:2019
- 资助金额:
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Research Grants
Predicting European forest soil biodiversity and its functioning under ongoing climate change
预测欧洲森林土壤生物多样性及其在持续气候变化下的功能
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318650011 - 财政年份:2016
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Factors controlling phosphorous availability and their relevance for phosphorous nutrition of forest stands
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Priority Programmes
Phosphorus concentrations in growth rings of trees as indicators of P availability and recycling efficiency in forest ecosystems
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Mixed Forest plantations for climate Change mitigation and adaptation
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The influence of forest floor changes on the success and composition of tree regeneration
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