Zhengzhou Tianci organic fertilizer machine
manufacturer helps you to summarize the mistakes of fertilizer spraying as follows:
Myth 1: as long as the fertilizer melts in the water, it can be sprayed on the leaves
When spraying fertilizer on crops and vegetables, several kinds of foliar fertilizer are applied together, thinking that the more complete the variety is, the better the effect is. No matter what fertilizer, as long as it can be "melted open", it can be applied as foliar fertilizer, but it is not.
If the volatile fertilizer is very strong, it is not suitable for foliar fertilizer spraying. If the high temperature is encountered after spraying, it will cause damage to the crops and burn the leaves. Moreover, many micro fertilizers can not be mixed with pesticides, acid fertilizers and basic fertilizers can not be mixed for spraying, so it should be targeted for mixed application, which plays the role of "one-time spraying, multiple effects", otherwise it will backfire.
Mistake 2: the higher the spraying concentration, the better
The higher the concentration of foliar fertilizer solution, the better, this is not correct. For example, the concentration of high nitrogen water-soluble fertilizer should be less than 1%, and the concentration of potassium dihydrogen phosphate should only be less than 1%. The concentration of more medium and trace element fertilizers, such as sugar alcohol calcium fertilizer, sugar alcohol calcium boron fertilizer, sugar alcohol zinc, chelated iron, chelated copper, etc., should also be less than 0.2%, and should be used strictly in accordance with the product instructions.
Under the condition of over concentration, not only can't spray foliar fertilizer, but also can cause dehydration and wilt of crop leaves, leading to fertilizer damage. Generally, spraying fertilizer solution on both sides of the leaves will start to drip. Too much fertilizer solution will also lead to the increase of cost and waste of fertilizer.
Myth 3: spray at any time
At any time of plant growth and development, foliar spraying can be carried out, which is not right. If foliar spraying is not well controlled, it will not achieve the desired effect.
Foliar spraying is carried out in the turning period of crop growth, and the interval of each spraying is at least 20 days, generally speaking, the crops are sprayed 2-3 times per season. Different crops, different fertilizers, foliar fertilization, the appropriate period also has some differences. Corn, wheat and other cereal crops should be sprayed with fertilizer during booting, flowering and grouting; soybean, peanut, broad bean and bean crops should be sprayed with fertilizer during flowering and pod setting;
Molybdenum fertilizer should be sprayed before flowering, while boron and zinc fertilizer should be sprayed at the beginning of flowering. The spraying time of foliar fertilizer should be in the morning of cloudy or sunny days when there is no wind. After the dew on the foliar surface is dry, avoid the period of hot sun and high temperature, and spray early and late.