Boron fertilizers suitable for vegetable crop application include borax, boric acid, and boron-containing superphosphate, boron carbonate, boron gypsum, boehmite, boron mud, and the like.
1. As a base fertilizer. Base fertilizer application is best on moderately or severely boron-deficient soils. Use 0.5~0.75kg of borax per mu to mix with dry fine soil or organic fertilizer, or mix with nitrogen, phosphorus, potassium and other fertilizers. Avoid contact with seeds (live) or seedlings (transplanting) with boron fertilizer to avoid affecting the growth of germination, seedling roots and seedlings. It is not suitable for deep sowing or spreading. The dosage should not be too large. The application per mu should not exceed 2.5 kg, otherwise it will reduce the emergence rate and even dead seedlings.
2. Soaking seeds. Soaking seeds should use borax or boric acid. First dissolve the borax with hot water at 40 °C, then add cold water to 0.01%~0.03%, pour the seeds into the solution, soak for 6~8 hours, the ratio of seed to liquid is 1: 1, can be sown after being fished out and dried.
3. Foliar spray. Master the spraying period, such as the solanaceous vegetables in the late seedling stage, the rosette stage and the initial flowering stage; the cabbages are sprayed 2~3 times in the late seedling stage, the rosette stage and the early stage of the ball formation; the root vegetables are grown in the late stage to the roots. Spray 2 times; leafy vegetables spray 2~3 times in the late stage of seedling to the prosperous period. The concentration of 0.1%~0.2% is suitable for the "Sparkle Boron" aqueous solution, and the spray is evenly distributed until the leaves are fully wetted. Foliar spray is better in the afternoon or evening. Spray the foliar fertilizer droplets to be fine, so that the leaves are covered with mist droplets. If it rains 6 hours after spraying, it should be sprayed once again.
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