Different kinds of vegetables have different requirements for boron, and more boron is needed: radish, turnip, cabbage, cauliflower, lentils, pepper, cabbage, cabbage; moderate amounts of boron are needed: tomatoes, carrots, celery; boron requirements Less are: cucumber, spinach, onion, leeks. When a certain amount of boron in a vegetable is insufficient, symptoms appear. Such as radish lack of boron suffering from "brown heart disease"; celery is easily broken boron; tomato, pepper cucumber and other boron deficiency, drop serious fruit drop, and easy to produce deformed fruit. In addition to the lack of boron in tomatoes, the stem growth points are often black and dry at the seedling stage, resulting in serious reduction of yield in later stages.
Boron fertilizers currently used are borax and boric acid. It can be used as base fertilizer, seed fertilizer and foliar fertilizer.
Basal fertilizer: boron can be mixed with nitrogen, phosphorus and potash when used as base fertilizer, and can also be used alone. It is required that the boron fertilizer be evenly distributed in the field with 125-200 grams of pure boron applied per acre. The application of basal fertilizer with long-term effect of boron fertilizer is generally 3-5 years, but the application amount must not be arbitrarily increased to avoid damage to vegetables.
Fertilizer: When soaking seed, put the seed in the solution with 2 times the amount of seed, the solution concentration is 0.01-0.1% (borax), suitable time is 12-24 hours, remove and wash with water, then germination, sowing, nursery . When the seed dressing concentration should not be too large, not more than 0.1%.
Foliar spray fertilizer: a commonly used method on vegetables, spraying concentration: borax 0.1-0.2%, boric acid 0.01%.
Tomato: Spraying 0.2% borax solution on the first flowering stage and full flowering stage can increase the fruit setting rate and increase the yield by about 15%.
Cauliflower: 0.2% borax solution was sprayed once at the seedling stage and early flowering stage, generally increasing production by about 10%.
Sweet peppers and peppers: Spray with borax 0.2% or 0.1% boric acid solution for 2-3 times at the early flowering stage and full flowering period. You can mention the morning market for 7-10 days, increase production by 15%, and the higher ones can increase production by 20%.
Celery: sprayed with 1.2% boric acid solution, increase production by 12%, and control celery "stem disease."
Cabbage: Yield about 10% with foliar spraying of 0.1% borax solution.
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