The foliar spraying of crops (extra-root dressing) can quickly supplement nutrients, relieve various physiological diseases of crops due to lack of nutrient elements, promote robust growth of crops, increase yield and improve quality. The following describes the commonly used concentration of foliar fertilizers.
1, potassium dihydrogen phosphate commonly used concentration of 0.3%. Method: Add 300 kg of potassium dihydrogen phosphate to 100 kg of water and spray thoroughly after dissolving.
2, urea commonly used concentration 1% ~ 2%. When you use it, be careful that the content of diuretic urea in the urea exceeds 1.5%, which is toxic to the crop. Therefore, no foliar spray can be performed.
3, plant ash commonly used concentration 5% to 7%. Must be used to add water to plant ash preparation, add water for 15 hours after filtration.
4. The concentration of superphosphate is 2%. After the superphosphate is added with water, the mixture is stirred well. After standing for 24 hours, the supernatant is sprayed.
5, boron (or boric acid) commonly used concentration of 0.2% to 0.3%. Method: First use a small amount of hot water soluble borax at 45°C, then dilute with water.
6. Paclobutrazol fruit trees were sprayed with 1000-1500 mg/kg solution, and crops were sprayed with 50 mg/kg solution.
7, copper sulfate commonly used concentration 0.02% ~ 0.05%. When used, a small amount of lime solution is added to the solution to eliminate poisoning.
8, the common concentration of manganese sulfate is 0.05% ~ 0.l%.
9, zinc sulfate commonly used concentrations of 0. l% ~ 0.2%, in the solution after adding a small amount of lime spray.
10, rice vinegar with 200 ~ 250 ml of water 45 ~ 50 kg spray.
11. Ammonium molybdate is sprayed on leguminous crops at a common concentration of 0.05 to 0.1%.
A seedbed or seedling bed is the local soil environment in which seeds are planted. Often it comprises not only the soil but also a specially prepared cold frame, hotbed or raised bed used to grow the seedlings in a controlled environment into larger young plants before transplanting them into a garden or field. A seedling bed is used to increase the number of seeds that germinate.
Greenhouse Seedling Bed,Stainless Greenhouse Seedling Bed,Greenhouse Seedling Nursery Bed
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