Foliar fertilizer is an effective way to quickly supplement nutrition, eliminate the physiological diseases of crops due to lack of nutrients, promote the healthy growth of crops, and improve the yield. However, mastering the concentration of foliar fertilizer will not often result in crop damage. Therefore, the planting land network has sorted out the concentrations of commonly used foliar fertilizer, which are listed in detail below for netizens' reference.
1. Concentration of urea as foliar fertilizer:
The commonly used spraying concentration is 1%~1.5% (i.e. 100 kg water plus 1~1.5 kg urea); In this range, the concentration of dicotyledons can be appropriately lower; Monocotyledons, the concentration can be appropriately higher; At seedling stage, the concentration can be appropriately lower; At seedling stage, the concentration can be appropriately higher.
2. Concentration of superphosphate as foliar fertilizer:
The commonly used spraying concentration is 2%~3%; The fertilizer shall be fully stirred after adding water, and shall be filtered after standing for 24 hours. The clear liquid shall be sprayed.
3. Concentration of potassium dihydrogen phosphate as foliar fertilizer:
The commonly used spraying concentration is about 0.3%; The preparation method is to take 300g potassium dihydrogen phosphate and add 100kg water, fully dissolve and spray.
4. Concentration of potassium sulfate as foliar fertilizer:
The commonly used spraying concentration is 1% ～ 1.5%.
5. Concentration of zinc sulfate as foliar fertilizer:
The commonly used spraying concentration is 0.1% ～ 0.2%; Add a small amount of lime liquid into the solution and spray it.
6. Concentration of borax (or boric acid) as foliar fertilizer:
The commonly used spraying concentration is 0.2% ～ 0.3%; When preparing the solution, first dissolve the borax with a small amount of 45 ℃ hot water, and then add enough water.
7. Concentration of plant ash as foliar fertilizer:
The commonly used spraying concentration is 3%~5%; Mix the plant ash with water and let it stand for 15 hours before filtering.