经分析认为，作物抗旱性只是人们对植物适应各种干旱环境的通俗概括，并不是一个严格意义上的科学术语或概念。半干旱地区，水的时空有效性与作物生长时期的不协调是作物不能实现其全部产量潜力的主要限制因素。提高作物个体的干旱适应能力将导致作物群体产量的降低。因此，要获得较高的产量，首先就要求作物品种在生长、发育及产量形成期，特别是敏感时期，能够避开干旱周期，以减少水分亏缺对作物生长与产量形成的胁迫作用；其次是剔除个体数量性状的冗余、提高收获指数和水分利用效率。通过此两项措施，可望获得半干旱地区作物生产的更大成效 The analysis suggests that crop drought resistance is only a generalization of plants to adapt to various drought environments and is not a scientific term or concept in the strict sense. In semi-arid areas, the lack of coordination between the temporal and spatial effectiveness of water and the crop growth period is a major limiting factor on the potential of a crop to achieve its full yield potential. Increasing the drought resilience of individual crops will result in lower crop yields. Therefore, in order to obtain higher yields, the first requirement is that crop varieties can avoid the drought cycle in the period of growth, development and yield formation, especially in sensitive periods, so as to reduce the stress effect of water deficit on crop growth and yield formation. Secondly, Is to eliminate the redundancy of quantitative traits of individuals to improve the harvest index and water use efficiency. Through these two measures, it is expected that more effective crop production can be achieved in semi-arid areas