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Soil phosphorus budget in global grasslands and implications for management

机译:全球草原上的土壤磷预算及其对管理的启示

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摘要

Grasslands, accounting for one third of the world terrestrial land surface, are important in determining phosphorus (P) cycle at a global scale. Understanding the impacts of management on P inputs and outputs in grassland ecosystem is crucial for environmental management since a large amount of P is transported through rivers and groundwater and detained by the sea reservoir every year. To better understand P cycle in global grasslands, we mapped the distribution of different grassland types around the world and calculated the corresponding P inputs and outputs for each grassland type using data from literature. The distribution map of P input and output revealed a non-equilibrium condition in many grassland ecosystems, with: (i) a greater extent of input than output in most managed grasslands, but (ii) a more balanced amount between input and output in the majority of natural grasslands. Based on the mass balance between P input and output, we developed a framework to achieve sustainable P management in grasslands and discussed the measures targeting a more balanced P budget. Greater challenge is usually found in heavily-managed than natural grasslands to establish the optimum amount of P for grass and livestock production while minimizing the adverse impacts on surface waters. This study provided a comprehensive assessment of P budget in global grasslands and such information will be critical in determining the appropriate P management measures for various grassland types across the globe. (C) 2017 Elsevier Ltd. All rights reserved.
机译:草原占世界陆地面积的三分之一,对于在全球范围内确定磷(P)循环至关重要。了解管理对草地生态系统中磷输入和输出的影响对于环境管理至关重要,因为每年都有大量的磷通过河流和地下水运输,并被海库滞留。为了更好地了解全球草地上的磷循环,我们绘制了世界各地不同草地类型的分布图,并使用来自文献的数据为每种草地类型计算了相应的P输入和输出。 P输入和输出的分布图显示出许多草地生态系统中存在非平衡状况,其中:(i)在大多数管理草地上输入的程度大于输出,但(ii)在该区域中输入和输出之间的平衡程度更高大部分天然草原。基于磷投入与产出之间的质量平衡,我们开发了一个框架来实现草地的可持续磷管理,并讨论了针对更加平衡的磷预算的措施。在管理最严的草原上,通常要比天然草原面临更大的挑战,以便为草和牲畜生产确定最佳的磷含量,同时最大程度减少对地表水的不利影响。这项研究对全球草地的磷预算进行了全面评估,而这些信息对于确定全球各种草地类型的适当磷管理措施至关重要。 (C)2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Journal of arid environments》 |2017年第9期|224-235|共12页
  • 作者单位

    Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China|IUPUI, Dept Earth Sci, 723 W Michigan St SL118, Indianapolis, IN 46202 USA;

    IUPUI, Dept Earth Sci, 723 W Michigan St SL118, Indianapolis, IN 46202 USA;

    Chinese Acad Forestry, Expt Ctr Desert Forestry, Dengkou 015200, Inner Mongolia, Peoples R China;

    Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China;

    Chinese Acad Forestry, Expt Ctr Desert Forestry, Dengkou 015200, Inner Mongolia, Peoples R China;

    Prevent & Quarantine Bureau Forestry Pest Liaonin, Shenyang 110036, Liaoning Proven, Peoples R China;

    IUPUI, Dept Earth Sci, 723 W Michigan St SL118, Indianapolis, IN 46202 USA;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Dryland; Environmental risk monitoring; Erosion; Grazing; Leaching; Runoff;

    机译:旱地;环境风险监测;侵蚀;放牧;淋滤;径流;
  • 入库时间 2022-08-17 13:29:57

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