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首页> 外文期刊>International Journal of Water >Irrigation challenges in the sub-humid US Mid-South
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Irrigation challenges in the sub-humid US Mid-South

机译：美国中南部半湿润地区的灌溉挑战

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摘要

Irrigated area in the Mid-South USA continues to increase and now totals four million ha. Because of low available water holding capacities and shallow root-limiting layers in many soils, irrigation management is difficult. Water quality and water use efficiency impacts under irrigation are poorly understood, but comprehension is necessary if conversion from groundwater to surface water supplies is to be justified. As irrigation has increased, the number of university research and extension personnel as well as the number of US Department of Agriculture personnel in the Agricultural Research Service and Natural Resources Conservation Service has not kept pace with the increase and the resulting challenges. A combined state and federal response to these challenges is needed to provide appropriate and effective problem solutions that ensure efficient water use and high crop water productivity while protecting water supplies and the environment.
机译：美国中南部的灌溉面积持续增加，目前总面积为400万公顷。由于许多土壤中的持水量低且根系限制层较浅，因此灌溉管理困难。灌溉条件下对水质和水利用效率的影响了解得很少，但是如果要证明从地下水转换为地表水的合理性，则有必要理解。随着灌溉的增加，大学研究和推广人员的数量以及农业研究服务和自然资源保护服务部门的美国农业部人员的数量并未跟上增长的步伐，并随之而来。需要州和联邦政府共同应对这些挑战，以提供适当和有效的问题解决方案，以确保高效用水和高作物水分生产率，同时保护水供应和环境。

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