Is it necessary to apply fertilizer to the yellow leaves of Xiashan orchid? The farmer taught you how to use foliar fertilizer skillfully.
If orchids are well raised, fertilizing is indispensable. After going down the mountain and raising the orchid for a period of time, the orchid friends will find that the orchid leaves will turn yellow, not as beautiful as when they just went down the mountain. Why? Because in the first year of the orchid, the root system does not have the ability to absorb nutrients, but because flowering, sprouting and rooting all need nutrients, it first consumes the nutrients brought by the orchid plant, and the loss of these nutrients will make the orchid leaves turn yellow. this is a normal physiological phenomenon.
So, now orchids can not be fertilized, what should be done? We can use foliar fertilizer to supplement nutrients, foliar fertilizer should pay attention to the comprehensive cooperation of nitrogen, phosphorus and potassium, not partial application. If the orchid is deficient in nitrogen, the leaves are yellow and thin; if it is deficient in phosphorus, it is not easy to take root; if it is deficient in potassium, the orchid plant cannot stand erect.
I usually use urea and potassium dihydrogen phosphate to spray foliar fertilizer with some antibiotics at the same time, so the effect is better. The foliar fertilizer would rather be light than thick. The farmer once hurt the orchid leaf by urea, but he did not have a good concentration. I am now using a 20 kg spray bucket, each time urea 2 2, potassium dihydrogen phosphate 50 grams, carbendazim appropriate amount.
Foliar fertilizer spraying should pay attention to two points: first, be sure to spray in the sunny afternoon, do not bask in the sun, so that the fertilizer sprayed is not easy to produce fertilizer damage, and the orchid plant is easy to absorb. Second, after spraying the front, put the spray head up, and spray the negative side of the orchid leaf, in fact, the back of the orchid leaf absorbs fertilizer better than the front.
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