Foliar spray fertilizer has the characteristics of foliar fertilizer, with less dosage, quick fertilizer effect, significant yield increase, simple use and so on, and is well received by farmers. According to statistical data analysis, in the moderately fertile soil, the required fertilizer is sprayed on the crop leaves in time, which can increase the yield of food crops by 5%-10%, fruit trees by 5%-15%, and vegetables by 20%. - 30%. However, some farmers have obvious misunderstandings on the use of foliar fertilizers. They do not pay attention to the methods of use, the types of use, the time of use, etc. Below, we will introduce the matters that should be paid attention to when spraying foliar fertilizer.
First, to determine the best period of crop spraying. Some farmers' friends mistakenly believe that foliar fertilizer can be sprayed during any growth period of the crop. In fact, foliar spray fertilizer relies on the absorption of leaves to transport nutrients to the vegetative organs of the plants, which requires the crops to reach enough The leaf area is carried out, otherwise, the effect of spraying is not achieved. Therefore, spray fertilizer is generally carried out in the middle and late stages of crop growth. At this time, the physiological activity of the leaves is strong, and it is easy to convert and absorb nutrients.
Second, according to the characteristics of crops, scientifically select the type of foliar fertilizer. Not any chemical fertilizer can be used as foliar fertilizer. Some volatile fertilizers, such as ammonia water, ammonium bicarbonate, etc., will evaporate ammonia gas after spraying, which will cause gas damage to crops and cause leaf smog. The other is that some crops are contraindicated, such as foliar fertilizers that are banned from chlorine in vegetables. Do not apply potassium chloride when spraying potassium fertilizer on sweet potato, potato, watermelon, etc., but spray dihydrogen phosphate. Potassium.
Third, we must master the appropriate concentration of fertilizer. Some farmers mistakenly believe that the greater the concentration, the better the effect. In fact, foliar fertilizer only plays a role in supplementing and regulating, and cannot replace base fertilizer and top dressing. It is necessary to strictly control the concentration of fertilization. Otherwise, not only the fertilizer will be produced, but also unnecessary economic losses will be caused. Generally, the concentration of the fertilizer solution is low and the height is not high.
Fourth, we must master the spraying time. Generally, it should be 8-10 am on the sunny day and 5-7 o'clock in the afternoon. Do not spray after the rain or in the morning, because at this time there is dew on the leaves, which will reduce the concentration of the fertilizer, and the effect will not be achieved. Under the hot sun at noon, under high temperature conditions, water evaporation is strong and the efficiency of fertilizer efficiency is low.
Fifth, we must master the number of spraying. For crops with short growth period, spray 1 to 2 times, and long growth period can be sprayed 2 to 3 times. At the same time, according to the plant growth and soil fertility, the number of times should be flexibly grasped. In the case of insufficient fertility, it can be properly applied 1 to 2 times, and sprayed continuously during the same growth period, each time being about 10 days apart.
First, to determine the best period of crop spraying. Some farmers' friends mistakenly believe that foliar fertilizer can be sprayed during any growth period of the crop. In fact, foliar spray fertilizer relies on the absorption of leaves to transport nutrients to the vegetative organs of the plants, which requires the crops to reach enough The leaf area is carried out, otherwise, the effect of spraying is not achieved. Therefore, spray fertilizer is generally carried out in the middle and late stages of crop growth. At this time, the physiological activity of the leaves is strong, and it is easy to convert and absorb nutrients.
Second, according to the characteristics of crops, scientifically select the type of foliar fertilizer. Not any chemical fertilizer can be used as foliar fertilizer. Some volatile fertilizers, such as ammonia water, ammonium bicarbonate, etc., will evaporate ammonia gas after spraying, which will cause gas damage to crops and cause leaf smog. The other is that some crops are contraindicated, such as foliar fertilizers that are banned from chlorine in vegetables. Do not apply potassium chloride when spraying potassium fertilizer on sweet potato, potato, watermelon, etc., but spray dihydrogen phosphate. Potassium.
Third, we must master the appropriate concentration of fertilizer. Some farmers mistakenly believe that the greater the concentration, the better the effect. In fact, foliar fertilizer only plays a role in supplementing and regulating, and cannot replace base fertilizer and top dressing. It is necessary to strictly control the concentration of fertilization. Otherwise, not only the fertilizer will be produced, but also unnecessary economic losses will be caused. Generally, the concentration of the fertilizer solution is low and the height is not high.
Fourth, we must master the spraying time. Generally, it should be 8-10 am on the sunny day and 5-7 o'clock in the afternoon. Do not spray after the rain or in the morning, because at this time there is dew on the leaves, which will reduce the concentration of the fertilizer, and the effect will not be achieved. Under the hot sun at noon, under high temperature conditions, water evaporation is strong and the efficiency of fertilizer efficiency is low.
Fifth, we must master the number of spraying. For crops with short growth period, spray 1 to 2 times, and long growth period can be sprayed 2 to 3 times. At the same time, according to the plant growth and soil fertility, the number of times should be flexibly grasped. In the case of insufficient fertility, it can be properly applied 1 to 2 times, and sprayed continuously during the same growth period, each time being about 10 days apart.
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