Application of boron fertilizer in boron-deficient soil has a good promoting effect on the growth and development of watermelon. According to the test, the application of boron fertilizer in watermelon, the rate of increase of 7.4%, an increase of 11.7%, sweetening 0.7 degrees. The application of boron fertilizer is as follows:
1. Base fertilizer. 0.5 ~ 1 kg of borax per acre or 3.5 ~ 7 kg of boron magnesium fertilizer, mixed with appropriate amount of nitrogen, phosphorus fertilizer spread, soil preparation when turned into the soil. Generally do not use furrows or acupuncture, so as to avoid local soil boron concentration is too high and have a toxic effect on watermelon.
2. Top dressing. Foliar spraying with 0.1% to 0.2% borax solution. In addition, the boron fertilizer can also be formulated into a sugar-enhancing solution on watermelons by using 30 grams of borax, 5 grams of calcium chloride, 1 kilogram of sucrose, and 50 kilograms of water, which are fully dissolved and sprayed when the watermelon begins to expand. , spray 50 ~ 100 kg per mu.
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