Urea four classic formula, promote the growth of roots and green leaves, and double the fertilizer efficiency
As the saying goes: there is a harvest of grain, the harvest is more and less depends on the fertilizer, we can not do without nitrogen in the production process of vegetables, nitrogen can promote the growth of stems and leaves, in the case of nitrogen deficiency, the plant will appear very weak, and the leaves will lose their green and yellow, so the most commonly used chemical fertilizer is nitrogen fertilizer.
Nitrogen fertilizers mainly include urea, ammonium carbonate, ammonium bicarbonate, ammonium sulfate, ammonium nitrate, ammonium chloride and other fertilizers, and the largest nitrogen content is urea, which can be topdressed by roots (covering the soil as deeply as possible) or leaf topdressing. Urea leaf-based topdressing has the advantages of fast absorption, good effect, low dosage, good effect, etc., I would like to introduce with you four methods that can maximize the release of urea's production potential, which is very practical.
1. Urea and diammonium hydrogen phosphate.
Because urea contains a lot of nitrogen and no other nutrients, it is not enough to fully meet the needs of crops by applying N fertilizer alone.
When using urea foliar fertilizer, it must be used in combination with potassium dihydrogen phosphate. Potassium dihydrogen phosphate is an effective phosphorus and phosphorus binary compound fertilizer, and we can provide three rich nutrients for crops by using urea and potassium dihydrogen phosphate for foliar spraying, which is very helpful for the healthy growth of crops.
Specific usage: At any growth stage, we can spray 20 kg on the leaves with "urea 50 g + potassium dihydrogen phosphate 50 g" on one acre of land, once every 10 days, and spray 2-3 times in a row, so that the vegetables will become more verdant and green, and the number of fruits will increase significantly.
2. Urea, glucose and urea.
In addition, urea can be sprayed with glucose. Glucose is the photosynthetic product of plants, we can use "urea 100 g + 50 g glucose" per mu to spray 20 kg of water on the foliar surface, which can make the photosynthesis of plants more efficient, in a certain period of time, crops can better synthesize more organic matter, and the leaves of vegetables will be greener and thicker, thereby promoting the growth of vegetables.
3. Urea and herbicides, weeds will compete with crops for water, nutrients and sunlight, so weed control is a very important issue in the farming process. In modern agricultural production, chemical herbicides are usually sprayed for weeding to achieve better weeding results, but many people find that weeds cannot be killed after spraying herbicides, so when spraying herbicides, as long as a small amount of urea is added, the weeding effect can be significantly improved.
How effective is the addition of urea to herbicides?The herbicide has good solubility in water, and spraying it on the weeds with urea solution can make the stratum corneum of the weed epidermal cells soft, accelerate the penetration of the herbicide, and achieve better weedicide.
Urea is a neutral substance, so the addition of urea during the spraying process does not affect its physical and chemical properties. Usage: Add 30 g of urea to a can of herbicide, then mix and spray onto the leaves.
4. Urea + chlorhexidine.
The fourth recipe we should also understand when spraying urea foliar fertilizer is to use "amine fresh ester", which is a high-efficiency, broad-spectrum and non-toxic plant growth regulator that can be used with fungicides, insecticides and foliar fertilizers.
Bactericide can enhance the photosynthetic ability of plants, enhance the root development of plants, enhance the stress resistance of plants, in the planting of cabbage, spinach, celery, lettuce, water spinach, cabbage, coriander and other leafy vegetables, the unit area can be used "urea 100 g + 8% amine fresh ester 10 grams", with 20 kg of water for foliar spraying, can greatly promote the vegetative growth of plants, vegetable leaves widening, thickening, greening, spraying 3 days can be effective;
For peppers, eggplants, tomatoes, cucumbers, loofahs, zucchini and other fruits and vegetables, 50 grams of dipotassium hydrogen phosphate + 10 grams of 8% ammonia fresh ester per mu, mixed with 20 kg of water for foliar spraying, can greatly improve the fruit setting rate and disease resistance of plants, can promote early maturity and high yield of fruits, and can increase yield by 30% 40%.
In particular, we should be reminded that when we spray foliar fertilizer, we cannot blindly increase the concentration, for example, the spraying concentration of urea is 05-0.8%, the concentration of spraying should not be higher than 1%, otherwise it is likely to cause fertilizer loss;For example, potassium dihydrogen phosphate is sprayed at a concentration of 02%-0.3%, i.e. 0. in 100 **2-0.3 g of potassium phosphate monobasic.
In addition, when spraying foliar fertilizers, it should be avoided during the period when evaporation is high in the middle of the day, and should be done on sunny days, or in the morning and evening when there is less evaporation, so that the effect of foliar spray can be greater.
In summary, the above four foliar fertilizers are well-known to us, which can help us grow higher quality crops and greatly improve the fertilizer effect.