What factors will affect the fertilizer efficiency of foliar fertilizer? Foliar fertilizer application has the characteristics of less dosage, high utilization rate and quick effect. At present, the application of foliar fertilizer is more and more common. In order to improve the fertilizer efficiency of foliar fertilizer more easily and quickly, we must first understand some factors that can affect the fertilizer efficiency.
To be considered as a variety of crop types, the absorption capacity and the amount of absorption are different. Generally, the blade is subjected to a large amount of various aqueous solutions, the solution stays on the blade for a long time, the blade absorbs more solution, and the effect of spraying the fertilizer on the foliar surface is good, and vice versa. Like rice, wheat, corn, etc., the leaves are erect, narrow, the surface stratum corneum and waxy layer are thicker, the surface area is smaller, the leaves and stems are erect, the angle is small, and the sprayed solution is easy to roll off, so the nutrient solution It is also difficult to penetrate into the interior of the blade. Like rapeseed, cotton, sweet potato, etc., its leaf surface is flat and the leaf area is large. The stratum corneum and waxy layer on the surface of the leaf are thin. The sprayed nutrient solution tends to accumulate on the leaf and easily penetrate into the mesophyll tissue. . Therefore, the variety of crops is different, and the benefits of foliar absorption are also different.
The impact of weather on rainwater and temperature also affects the absorption of foliar fertilizer by crops. It has been determined that at 30 ° C, 20 ° C and 10 ° C, the relative velocities of the phosphorus-absorbing isotopes of the leaves are 100, 71 and 53 respectively, and as the temperature decreases, the rate at which the leaves absorb nutrients also slows down. In the case of high temperature at noon on a sunny day, the solution evaporates quickly, the time spent on the blade is short, and the amount of solution permeating into the blade is also reduced. Or it is raining in a short time after spraying, and most of the solution is washed away by rain, which also affects the effect of foliar application.
In the case of acid reaction, the pH of the foliar fertilizer solution of the solution absorbs more anions, while in the neutral reaction, it absorbs more cations. Therefore, when the foliar nutrient state of the foliar spray is mainly anion, the pH of the solution can be adjusted to a weak acidity. For example, when the superphosphate solution is used as a foliar fertilizer, the form of phosphorus entering the leaf is mainly hydrogen phosphate. The root ion, its aqueous solution is slightly acidic, which is beneficial to the absorption of hydrogen phosphate ions by the leaves; if the solution is based on cationic nutrients, the pH of the solution can be adjusted to neutral or slightly acidic, which is beneficial to the cation nutrients of crops. Absorption.
Varieties of fertilizers Because of their physical and chemical properties, various chemical fertilizers have different permeability when they are formulated into aqueous solutions. Generally, the rate of nitrogen absorption by leaves is greater than that of nitrate. , larger than ammonium salt.
It should be noted that because the physicochemical properties of fertilizers determine that some nutrients are prone to deterioration, it determines the size of foliar fertilizer, so foliar fertilizer must be used with the use, so as not to reduce fertilizer efficiency.
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