What is the application of citrus foliar fertilizer? matters needing attention in spraying fertilizer

Citrus cultivation for a long time, in the process of culture management, often prone to the phenomenon of element deficiency, the effect of direct fertilization is very slow, often foliar fertilizer spraying can improve the leaf yellowing caused by element deficiency as soon as possible. So foliar fertilizer spraying is very common. So generally foliar fertilizer spraying, what is sprayed, and what should be paid attention to in the whole process of spraying fertilizer. This is what we are going to introduce now.

1. Suitable for fertilizer

Citrus is prone to calcium deficiency and boron deficiency, when the lack of these two elements, the lack of pectin calcium, fruit cracking may occur, affecting the quality of the fruit. So 0.1% borax and 1% calcium superphosphate can be sprayed. In order to improve the flowering rate before flowering, a mixture of 0.5% urea, 2% superphosphate and 2% potassium sulfate is needed. Spraying 0.4% urea and 0.2% potassium dihydrogen phosphate can reduce fruit shedding. 0.3% urea, 3% superphosphate and 0.5%-1% potassium sulfate were sprayed, mainly for fruit growth.

2. Fertilizer concentration

The use of foliar fertilizer must pay attention to the use of appropriate concentration, can not use too high concentration, high concentration will hurt the leaves, causing yellow leaves, then the fertilizer can not be absorbed. If the concentration is too low, the absorption effect of the plant is not good, so it is necessary to adjust the appropriate concentration of fertilizer according to fertilizer.

3. Fertilizer spraying time

Generally in different growth cycles, fertilizer requirements are different, the fruit growth period needs to supplement calcium and boron, other periods need other fertilizers, there are other purposes. Generally speaking, the specific time of spraying fertilizer is on a cloudy day or a humid morning. Or in the evening. High humidity, no direct light, spray fertilizer when the temperature is cool, easy to absorb, do not hurt the leaves.

4. Spraying site

Foliar fertilizer is usually sprayed on the back of the leaf, because there is no stratum corneum on the back of the leaf, which is easy to absorb. The cuticular layer on the front of the leaf is not absorbed so well. And the stomata are on the back of the leaves, which can be easily absorbed, and then the stems can also be sprayed. Then it can also be carried out with root fertilization, and the effect is better.

Citrus foliar fertilizer spray is mainly a variety of chemical fertilizers, such as urea, potassium dihydrogen phosphate. Spray concentration should be paid attention to, spray in the right place, choose the right time to spray.