How to apply fruit tree foliage fertilizer after heavy rain

In recent years, continuous rainfall in our province, and most of the fruit trees are in the period of long fruit and flower buds differentiation, nutrient consumption, some orchards in different degrees showed the symptoms of lack of fertilizer. At this point the soil fertilization is difficult to operate, only to take the method of dressing fertilizers outside the roots, that is, foliar spray fertilizer to supplement the nutrients to meet the needs of fruit tree growth.

Fertilizer to add moisturizer There is a layer of thick and thin cuticles on the leaves of fruit trees, the solution penetration is more difficult, you can add appropriate amount of wetting agent (neutral soap, good quality detergent, etc.) in the foliar fertilizer solution, improve Foliar spray fertilizer effect.

Choosing the right spraying time Do not spray fertilizer at high temperatures. Do not spray at high temperatures. Spray on all days in a cloudy and cloudy day. Spray on sunny days before 10 a.m. and 5 p.m.

To have enough spray amount The amount of fruit fertilizer to absorb the foliar fertilizer solution is proportional to the amount of spray, and the appropriate amount of spray is that the fertilizer solution reaches the state of drip-free droplets on the leaf.

If the concentration is as high as possible without the occurrence of fertilizer damage, it is best to increase the concentration of the foliar fertilizer. This will not only satisfy the fruit tree's need for nutrients, but also the higher the concentration, the faster it will enter the leaves. At the same time according to the weather and the growth of fruit trees using the appropriate concentration, the general urea 0.3% -0.5%, superphosphate 0.5% -1.2%, potassium dihydrogen phosphate 0.2% -0.4%, ternary compound fertilizer 0.4% -0.5%, plant ash 1.5%-2%, the concentrations of borax, zinc sulfate, ferric citrate, magnesium sulfate, etc. in the trace elements are 0.08%-0.15%.

It is necessary to emphasize that the nutrients on the back of the sprayed leaf are absorbed into the fruit tree through the stomata of the leaf. The leaf stomata is mainly on the back of the leaf. Therefore, when the leaf surface is sprayed with fertilizer, the back of the leaf is mainly sprayed, and the nozzle is to face upwards. The fog point should be fine to facilitate the fertilizer solution. Penetration and absorption. At the same time, the amount of spray should not be too large, and it is advisable to prevent water from dripping on the leaves to prevent fertilizers from accumulating on the tips of the leaves to produce fat burning tips.

It is necessary to spray the fertilizer to see the growth of fruit trees. If the growth of fruit trees is weak, the branches and leaves grow slowly, and the leaves are yellow or light yellow, indicating that the fruit trees are short of nitrogen and iron, they should be mainly sprayed with nitrogen fertilizer, and appropriate spraying of ferrous sulfate, phosphate fertilizer and potash fertilizer. If the leaves are bright and green, and the branches are too long, it indicates that nitrogen fertilizer is sufficient. Phosphate fertilizer and potash fertilizer should be sprayed, and some trace elements should be sprayed properly. For trace elements, foliar spraying is the main method, and its effect is better than soil fertilization.

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