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棉花生育后期,根系活力逐渐衰老,吸收肥水能力相应减弱,而此时中、上部棉铃尚在充实阶段,仍需要一定的养分供应。因此喷施叶面肥,有利于棉花对肥料的吸收利用,起到补充营养,防止早衰、病害的作用,达到显著的增产增收效果。笔者结合多年的实践和体会,就如何科学使用叶面肥谈一下自己的见解:一、叶面喷肥主要类型:
At the later stage of cotton growth, root vigor gradually senescence, correspondingly weakened ability to absorb fertilizer and water, while at this time, the upper and middle bolls are still in a substantial stage and still need some nutrient supply. Therefore, spraying foliar fertilizer is conducive to the absorption and utilization of cotton on the fertilizer, play a supplementary nutrition, to prevent premature aging, the role of disease, to achieve significant increase yield. The author combines many years of practice and experience on how to use scientific foliar talk about their own views: First, the main types of foliar fertilizer: