Radish Hollow affects its food value and quality, and many vegetable farmers cannot find the reason for the radish hollow. Actually, the radish hollow is caused by the lack of boron in the soil. The following methods can be applied to apply boron fertilizer to prevent radish hollow:
When basal fertilizer is sown, use 17% of boric acid 300g or 11% of borax 500g, mix in 5-10kg of dry fine soil, fully mix and sieve again, and then apply basal fertilizer into seed ditch or seed hole in. The radish seeds can also be mixed into dry fine soil mixed with boron fertilizer, and the mixture is thoroughly mixed and sprinkled into the seed grooves and seed holes.
Add 3 to 5 kg of fine soil and add water and mix the boron fertilizer with 300 grams of boric acid per acre or 500 grams of borax per acre. Stir it together into a thin paste, then pour the radish seeds and some dry fine soil. The handkerchief is used to make the soil containing boron fertilizer adhere to the surface of the seed and form a seed coat, which can be used for seeding until the seeds can be separated from the seed.
Foliar application of boron fertilizer can promote a big radish. From the radish sprouts grow 2 to 3 true leaves from the beginning to the first half of harvest, spray once a 20-day boron fertilizer, 150 grams of borax or 100 grams of boric acid per acre, first dissolved in a small amount of warm water, Water 60 to 75 kg evenly sprayed, spraying time in the evening is appropriate.