Boron supplement and air-proof core of radish

The hollow radish affects its edible value and quality, and many vegetable farmers can not find the reason for the hollow radish. In fact, the hollow radish is caused by boron deficiency in the soil. The following methods can be used to apply boron fertilizer to prevent hollow radish: when sowing as base fertilizer, use 300 grams of 17% boric acid or 500 grams of 11% borax per mu, mix it into 5 kilograms of dry and fine soil, mix well and then sift it, and then apply it to the seed ditch or hole as base fertilizer. The radish seeds can also be mixed into the dry fine soil mixed with boron fertilizer, mixed well, and sprinkled into the seed ditch and seed hole. For seed dressing, add 3 kilograms of fine soil with water and mix the boron fertilizer with 300 grams of boric acid or 500 grams of borax per mu, then pour the radish seeds and some dry fine soil in, and rub the soil containing boron fertilizer on the surface of the seeds to make seed coats, which can be used for sowing when the seeds can be separated from each other. Foliar spraying boron fertilizer can promote the heart of radish to grow bigger. From the beginning of Turnip Sprouts's growth of 2 or 3 true leaves to about half a month before harvest, boron fertilizer was sprayed every 20 days, with 150g borax or 100g boric acid per mu, dissolved in a small amount of warm water, and evenly sprayed with 60kg / 75kg of water. the appropriate time for spraying is in the evening.