If the leaves are sprayed with fertilizer, the fertilizer is formulated into an aqueous solution of suitable concentration, sprayed onto the leaf surface, and enters the tree through the epidermal cells and stomata to exert the fertilizer effect. This method is simple and easy to use, with less fertilizer and quicker effect, which can meet the urgent need of nutrients for fruit trees, and is conducive to the correction of deficiency syndrome. Fruit tree scientific application of foliar fertilizer can play a multiplier role.
Select fertilizer type based on fertilizer characteristics
Fertilizers commonly used for foliar fertilizers include urea, potassium dihydrogen phosphate, potassium sulfate, ammonium phosphate, superphosphate and grass ash leaching solution and some micro-fertilizers. Fertilizers such as volatile ammonium bicarbonate should not be used for foliar fertilizers.
According to the type of fruit trees and the purpose of topdressing, determine the spraying concentration and spraying period
In order to promote fruit coloring, 0.2% potassium dihydrogen phosphate can be sprayed during fruit expansion period; in order to improve the nitrogen storage nutrients of the tree, 3-5% urea solution can be sprayed after harvesting in autumn. The concentration of fertilizer in the early stage of fruit tree growth should be low, and it can be appropriately increased in the middle and late stages.
According to the climatic conditions, choose the appropriate spraying time
Foliar spray fertilizer should be carried out in relatively humid weather. When the leaf wet time is kept at 30~60 minutes, the fertilizer effect is best. In order to extend the storage time of the fertilizer on the leaf surface as much as possible, it is best when the air is wet in the morning and evening and the dew is not dry. The windless cloudy sky can be sprayed all day. If a proper amount of adhesive is added to the fertilizer solution, the spraying effect can be significantly improved.
Determine the number of sprays based on the movement of the fertilizer in the tree
The mobility of nitrogen and potassium in the tree is very strong, and it can be sprayed once in the critical period of fruit tree growth; the mobility of phosphorus is inferior to that of nitrogen and potassium, and it needs to be sprayed twice according to the growth of the tree; only part of zinc and copper Move, calcium and other trace elements are difficult to move, should be sprayed 2-3 times in a row to receive the expected results.
Source: Shaanxi Science and Technology News
Select fertilizer type based on fertilizer characteristics
Fertilizers commonly used for foliar fertilizers include urea, potassium dihydrogen phosphate, potassium sulfate, ammonium phosphate, superphosphate and grass ash leaching solution and some micro-fertilizers. Fertilizers such as volatile ammonium bicarbonate should not be used for foliar fertilizers.
According to the type of fruit trees and the purpose of topdressing, determine the spraying concentration and spraying period
In order to promote fruit coloring, 0.2% potassium dihydrogen phosphate can be sprayed during fruit expansion period; in order to improve the nitrogen storage nutrients of the tree, 3-5% urea solution can be sprayed after harvesting in autumn. The concentration of fertilizer in the early stage of fruit tree growth should be low, and it can be appropriately increased in the middle and late stages.
According to the climatic conditions, choose the appropriate spraying time
Foliar spray fertilizer should be carried out in relatively humid weather. When the leaf wet time is kept at 30~60 minutes, the fertilizer effect is best. In order to extend the storage time of the fertilizer on the leaf surface as much as possible, it is best when the air is wet in the morning and evening and the dew is not dry. The windless cloudy sky can be sprayed all day. If a proper amount of adhesive is added to the fertilizer solution, the spraying effect can be significantly improved.
Determine the number of sprays based on the movement of the fertilizer in the tree
The mobility of nitrogen and potassium in the tree is very strong, and it can be sprayed once in the critical period of fruit tree growth; the mobility of phosphorus is inferior to that of nitrogen and potassium, and it needs to be sprayed twice according to the growth of the tree; only part of zinc and copper Move, calcium and other trace elements are difficult to move, should be sprayed 2-3 times in a row to receive the expected results.
Source: Shaanxi Science and Technology News
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