I. What is foliar fertilizer?

       With the method of spraying fertilizer solution, so that the plant through the leaves to obtain nutrients measures, known as foliar fertilization, to foliar absorption for the purpose of the nutrients required by the crop directly applied to the foliage of the fertilizer, known as foliar fertilizer. Foliar fertilization, can make the nutrients from the leaves directly into the body, involved in the crop metabolism and organic matter synthesis process, and thus more rapid and effective than soil fertilization. Therefore, often as a timely treatment of crop deficiency effective measures. Fertilizer can also be fertilized according to the fertility of crops and seedlings and soil fertilization of the actual situation of staged spraying, give full play to the characteristics of the foliar fertilizer response quickly to ensure that the crop in the appropriate fertilizer conditions, normal growth and development, to achieve high yield and quality purposes.

Second, why foliar spraying? 

 1. Supplement the root fertilization deficiency

When the crop appears root fertilization inconvenience, such as in the late growth of the crop, the root system vitality decline, reduce the ability to absorb fertilizer; or when the soil environment is unfavorable to the growth of crops, such as too much water, drought, soil is too acidic, too alkaline, resulting in the crop root absorption is blocked, and the crop needs to quickly resume growth, if the root application method can not meet the crop needs in a timely manner, only to take the foliar spraying, in order to quickly replenish nutrients to meet the needs of crop growth and development. Meet the needs of crop growth and development.

2. Rapidly replenish nutrients

In the process of crop growth, the crop has shown some nutrient deficiencies, due to the use of soil fertilization requires a certain amount of time nutrients can be absorbed by the crop, can not alleviate the crop deficiency symptoms in a timely manner. At this time the use of foliar fertilization, can make the nutrients quickly through the leaves into the plant body, to solve the problem of deficiency.

3. Give full play to the effect of fertilizer

Some fertilizers such as phosphorus, iron, manganese, copper, zinc fertilizer, etc., if for root application, easy to be fixed by the soil, affecting the effect of application, while the use of foliar spraying will not be subject to the limitations of soil conditions. Another example, some fruit trees and other deep-rooted crops some nutrients absorbed less, if the traditional fertilization method is difficult to apply to the root absorption parts, but also can not give full play to its fertilizer effect, and foliar spraying can achieve better results.

4. Economical

Various trace elements are essential nutrients in the process of crop growth and development, but the amount of application is very small, such as molybdenum fertilizer, only a few dozens of grams per mu of application, if the root application method is not easy to apply evenly. Only take foliar spraying, in order to achieve cost-effective. According to research calculations, the general crop in the foliar spray boron fertilizer, the utilization rate of boron is 8.18 times the base application. In terms of economic efficiency, foliar spraying is more cost-effective than basal application.

5. Reduce the pollution of soil

Nitrogen fertilizer applied to the soil in large quantities, easy to cause the accumulation of nitrate in groundwater and vegetables, harmful to human health. Nitrate absorbed by humans about 75% from vegetables, if you take the method of foliar fertilization, properly reduce the amount of soil fertilizer, can reduce the nitrate content of plants and residual mineral nitrogen in the soil. On salinized soil, soil fertilization may increase the concentration of soil solution and aggravate soil salinization. Take foliar fertilization measures, not only saves the amount of fertilizer, but also reduces the pollution of soil and water, is a two-for-one effective fertilization technology.

Third, choose the advantages of foliar spraying? 

1. Less dosage, more economical

Soil application of micro-fertilizers, if the amount applied as a base fertilizer is relatively large, the effect is not ideal, generally 0.5-2.0 kg per acre, and foliar spraying concentration of sparse, more economical (leafy vegetables sprayed once or twice, eggplant fruit 10 days or so 1, the amount of soil application of one-fifth), conducive to crop absorption.

2. Fertilizer efficiency

Foliar spraying micro-fertilizer, nutrients can enter from the leaf cuticle and stomata, not in direct contact with the soil, thus avoiding soil fixation and reduce the effectiveness.

3. Fast nutrient absorption, high efficiency

Foliar spraying micro-fertilizer, can directly contact with the stem and leaves, absorption and transportation fast.

4. Easy to control the concentration

Foliar spraying micro-fertilizer, the concentration is easy to control, will not occur poisoning, safer.

5. Reduce pollution

Foliar spraying micro-fertilizer concentration is low, generally diluted 0.1% -0.3%, less dosage, will not pollute the environment.

Fourth, how to improve the effect of foliar fertilizer application? 

      Many farmers believe that crops or vegetables for the process of spraying, like to apply the more fertilizer the better, some even appear foliar fertilizer or other fertilizers applied together for better results, in fact, not so, as long as the method used is reasonable, the same can be to promote the growth of crops needs.

      Such as volatile fertilizers such as ammonia, ammonium carbonate, etc., if you do foliar fertilizer spraying, spraying after encountering high temperatures will cause damage to crops, burned leaves, so can not do foliar fertilizer application. And many micro-fertilizers can not be mixed with pesticides, acidic fertilizers and alkaline fertilizers mixed use, should be targeted for fertilizer, drug mixing and mixtures, to play a "one-time spraying of fertilizer, a variety of effects," the role, otherwise it will be counterproductive.