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甘薯历来多种在瘦地、坡地或套作于玉米地中,除套作甘薯能间接地吸收少量玉米追肥外,给净作甘薯施肥的极少,因此单产较低,一般亩产鲜薯仅两千斤左右。为了提高甘薯单产,作者先后六年对甘薯叶面肥的种类、方法和次数进行了一系列的试验,并获得了每喷肥一次增产5—7%的好效果。通过单因子对比或多因子裂区试验结果表明,无论用什么肥料喷施于甘薯藤叶,都
Sweet potato has always been a variety of thin, sloping land or set in the corn field, in addition to intercropping sweet potato can indirectly absorb a small amount of corn topdressing, to the net for sweet potato fertilization is very small, so the yield is low, Two thousand pounds or so. In order to improve the yield of sweet potato, the author conducted a series of experiments on the types, methods and times of sweet potato foliar fertilizer in the past six years, and obtained the good effect of 5-7% increase of yield per time. Through single-factor comparison or multi-factor split zone test results show that no matter what fertilizers sprayed on sweet potato vine leaves