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Water use in rain-fed farming at different scales in the Pampas of Argentina.

机译：阿根廷潘帕斯州不同规模的雨养农业用水。

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摘要

Water use in farming will be an issue of increasing global concern since competition for freshwater among sectors will grow, especially in a water-scarce scenario. Understanding how farming system configurations at different scales affect the partitioning of annual rainfall between production and losses is essential to manage water in rain-fed farming. Data from 198 commercial farms in the Pampas of Argentina were analyzed to assess water use at four different scales: (a) plot, (b) farm, (c) agro-ecological area and (d) whole region. This study offers a novel cross-scale approach and an analytical tool to evaluate water-use relationships in the study region beyond the classical plant-soil-water relationships. Results showed that cattle activities require more water than crops at the plot scale but at broader ones water use patterns are determined largely by cultivation. Given the different performance across scales, results suggest that complex spatial interactions and emerging properties can arise when the analyses are scaled-up from the plot to the regional level. The detection of scale-dependent properties regarding water use will enhance the value of information and knowledge that decision makers operating at different scales need.Digital Object Identifier http://dx.doi.org/10.1016/j.agsy.2012.02.003
机译：农业用水将成为全球关注的一个问题，因为各部门之间对淡水的竞争将会加剧，特别是在缺水的情况下。了解不同规模的农业系统配置如何影响年降雨量在生产和损失之间的分配对于管理雨养农业中的水至关重要。分析了来自阿根廷潘帕斯州198个商业农场的数据，以四种不同的规模评估用水：（a）地块，（b）农场，（c）农业生态面积和（d）整个区域。这项研究提供了一种新颖的跨尺度方法和一种分析工具，可以评估研究区域中除经典植物-土壤-水之间关系之外的用水关系。结果表明，在该样地范围内，牛的活动比庄稼需要更多的水，但从更广泛的角度来说，用水模式主要取决于耕作。考虑到跨尺度的不同性能，结果表明，当将分析从样地扩展到区域级别时，可能会出现复杂的空间相互作用和新兴属性。检测与水有关的尺度相关属性将提高在不同尺度上运行的决策者所需的信息和知识的价值。数字对象标识符http://dx.doi.org/10.1016/j.agsy.2012.02.003

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