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叶面喷施磷酸二氢钾对作物抗旱特性的作用不同的研究具有不同的结果。有的报道这种方式具有明显的改善代谢过程,促进抗旱性能,提高产量的作用,有的研究结果却认为没有明显的效果,有的结果则表明具有负的作用。研究结果如此大的差异,表明尚有许多基本的东西没有取得一致的认识。本研究即对不同水分胁迫状况的玉米幼苗叶面喷施磷酸二氢钾后的光合速率、蒸腾速率及水分利用效率的变化规律进行分析研究。
Effects of foliar application of potassium dihydrogen phosphate on crop drought resistance Different studies have different results. It has been reported that this method has the obvious effect of improving the metabolic process, promoting the drought resistance and increasing the yield. Some studies have found that there is no obvious effect, while others have a negative effect. Such a big difference in research results shows that there are still many basic things that have not been agreed upon. In this study, the photosynthetic rate, transpiration rate and water use efficiency of maize seedlings were sprayed with different concentrations of potassium dihydrogen phosphate under different water stress conditions.