因土壤环境不良、水分过多或干旱低湿、土壤过酸过碱等因素造成根系呼吸作用受阻,或作物缺素急需补充营养,以及作物生长后期根系吸收能力衰退时,采用叶面追肥可以弥补根系吸肥力不足,取得较好的增产效果。究竟如何施用叶面肥?主要有以下几点:一、选择适宜的肥料品种根据作物的生长发育及营养状况选择适宜的叶面肥品种。在作物生长初期,为促进其生长发育选择调节型叶面肥,若作物营养缺乏或生长后期根系吸收能力衰退,应选用营养型叶面肥。生产上常用于叶面喷施的化肥品种主 Due to poor soil environment, excessive moisture or drought and low humidity, soil over-acid and alkali and other factors caused by respiratory resistance blocked, or crop shortage is urgently needed to supplement nutrition, and the latter part of the growth of the root absorption capacity decline, the use of foliar top dressing can make up for the root system Sufficient absorption of fertility and achieved better yield increase. How to apply foliar fertilizer? The main points are as follows: First, select the appropriate fertilizer varieties According to the crop growth and nutritional status of the selection of suitable foliar fertilizer varieties. In the early crop growth, in order to promote its growth and development of select controlled-type foliar fertilizer, if the lack of crop nutrition or the growth of the late root absorption capacity decline, the use of nutrient-based foliar fertilizer. The main production of fertilizer varieties commonly used in foliar spray