Foliar fertilization essentials

The method of applying fertilizer solution to the plant to obtain nutrient elements through the leaves is called foliar fertilization. For the purpose of absorbing the foliage, the nutrient required by the crop is directly applied to the foliar fertilizer, which is called foliar fertilizer. In recent years, with the development of fertilization techniques, foliar fertilization has been rapidly promoted and applied as a fertilization measure for strengthening the nutrition of crops and preventing certain deficiency traits. Practice has proved that foliar fertilizer is one of fertilization technologies with rapid fertilizer efficiency, high fertilizer utilization, and low dosage.

Foliar fertilization allows nutrients to enter the body directly from the leaves, participate in the metabolism of the crop and the synthesis of organic matter, and is therefore more rapid and effective than soil fertilization. Therefore, it is often used as an effective measure for the timely treatment of crop deficiencies. When fertilizing, it is also possible to apply spraying in stages according to the crop growth period, seedling conditions, and actual conditions of soil fertility, and to give full play to the characteristics of rapid response to foliar fertilizer so as to ensure normal growth of the crop under suitable fertilizer and water conditions. Developed to achieve high yield and quality. However, only the correct application of foliar fertilizer technology can give full play to the effect of foliar fertilizer production increase. Therefore, the questions to be noted when using foliar fertilizers are:

Choosing the appropriate spraying concentration The foliar fertilizing concentration is directly related to the spraying effect. If the solution concentration is too high, the crop leaves may burn after spraying. When the solution concentration is too low, the workload is increased, and the supplementary crop nutrition is not achieved. The request. Therefore, due to fertilizer, because of different crops in the application, according to local conditions and symptomatic preparation.

Select the appropriate spray method to prepare the solution to be uniform, spray the fog to be uniform, spray times to see if necessary.

To master the foliar fertilization during spraying, it is necessary to apply the nutrient elements according to different growth and development stages of various crops, and to select the most necessary and most urgent spraying of crop nutrient elements in order to achieve the best results.

Choosing the right spraying time The effect of the foliar fertilizer application is directly related to temperature, humidity, wind force, etc. The best choice for foliar spraying is to choose no-wind, cloudy or high-humidity, low-evaporation 9:00 am In the past, it was most appropriate to proceed after 4:00 pm, and if it rained after 3-4 hours after spraying, additional sprays were required.

Choosing the appropriate spraying site The upper, middle and lower leaves and stalks of the plant are different in their ability to absorb external nutrients because of their different metabolic activities. Therefore, appropriate spraying sites should be selected.

Add additives in the foliar spray fertilizer solution, add additives, improve the adhesion of fertilizer solution on the plant leaves, and promote fertilizer absorption.

Combined with soil fertilization, because the roots have larger and more complete absorption systems than leaves, for large amounts of nutrients such as nitrogen, phosphorus, and potassium, it has been determined that more than 10 times of foliar fertilization can achieve the total amount of nutrients absorbed by roots. . Therefore, foliar fertilization cannot completely replace the roots of crops and must be combined with root fertilization.

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