Foliar Fertilizer Spraying Misconceptions

First,some farmers sprayed foliar fertilizer, obviously reducing the application of organic and chemical fertilizers, causing a certain impact on the yield of crops. Generally speaking, foliar fertilizer can only work on the basis of adequate nitrogen, phosphorus and potassium, is a comprehensive effect, can only play the role of "icing on the cake".

Second, some farmers think that foliar fertilizer solution concentration is better, which is not correct. Such as urea is only appropriate in less than 1%, potassium dihydrogen phosphate is only appropriate in less than 1%, more medium and trace element fertilizers such as calcium chloride, borax, zinc sulfate, ferrous sulfate, copper sulfate, etc. are only appropriate to master in less than 0.2%. Too thick case not only can not play a role in spraying fertilizer, but on the contrary will cause crop leaf dehydration, withering, resulting in fertilizer damage, that is, similar to drug damage, poisoning. Generally to spray to the leaf front and back side of the spread of fertilizer began to drip as degree. Too much fertilizer will lead to rising costs, fertilizer waste.

Third, some farmers foliar spray fertilizer can not catch the key period, did not achieve the desired effect. Foliar spray fertilizer is best in the crop's growth turnaround period, the interval of 10 to 20 days, even spray 2 to 3 times. Rice, corn and other cereal crops, it is appropriate to spray fertilizer in the pregnant spike, flowering, filling period. Soybean, peanut and other legume crops, it is appropriate to spray fertilizer in the flowering and podding period. Molybdenum fertilizer should be sprayed before the flowering of the plant. Boron fertilizer and zinc fertilizer is best sprayed in the early flowering period of the plant. The time to spray fertilizer should choose a windless cloudy or sunny morning, after the dew on the leaf surface dry, avoid the hot sun time, morning and evening spraying effect is good.