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根外追肥又叫根外营养,是苏联近年利用矿物质肥料施肥的新经验,在苏联证明根外追肥对农作物收获量及改良其品质具有良好的影响,特别是对于糖用甜菜和棉花具有极高的效用。根外追肥和普通追肥比较,其特点是当窄行播种甚至密播时都可以应用,在盐渍土及冷土中当土壤表层干燥不便应用普通追肥法时,可用此法通过叶子来进行追肥;此外利用根外追肥还可避免肥料在土壤中的微生物或化学作用的影
Extracorporeal topdressing, also known as extracorporeal nutrition, is a new experience of fertilization by mineral fertilizers in the Soviet Union in recent years. It has been proven in the Soviet Union that top dressing can have a good effect on crop yield and quality, especially for sugar beet and cotton High utility. Root top dressing and top dressing comparison, which is characterized by narrow row sowing and even close-sowing can be applied in saline soil and cold soil when the soil surface drying inconvenience application of common dressing method, this method can be used to make fertilizer through the leaves ; In addition, the use of root top dressing can also avoid fertilizer in the soil of microorganisms or chemical effects