Among the winter crops, cruciferous crops account for a large proportion, such as cabbage, cabbage, radish, rapeseed, etc. These crops are particularly sensitive to boron. At the same time, celery, wheat, carrots, etc. are also sensitive to boron. Boron deficiency is not only severely affected by reproductive growth, but also vegetative growth is blocked, cold resistance is reduced, and heart rot is easily induced. So how do you make up boron? The application method is as follows:
As base fertilizer: Boron fertilizer has the best effect on the soil with moderate or severe boron deficiency; 0.5~0.75 kg of borax per mu can be mixed with dry fine soil or organic fertilizer, then ditch strip application or hole application; or with nitrogen Phosphorus, potassium and other fertilizers should be mixed together and applied together; avoid direct contact of the boron fertilizer with seeds (live) or seedlings (transplanting), so as not to affect the growth of germination, emergence and roots and seedlings; it should not be deeped or applied. The dosage should not be too large; if the amount of borax applied per mu is more than 2.5 kg, the emergence rate will drop, and even the dead seedlings will be reduced.
Treatment of seeds: immersion in borax or boric acid, usually first dissolve the borax with hot water at 40 ° C, then add cold water to 0.01% ~ 0.03% of borax or boric acid solution, pour the seeds into the solution, soak for 6 ~ 8 hours The ratio of seed to liquid is 1:1, and it can be sown after being taken out and dried.
Foliar application: use 0.1%~0.25% borax or boric acid solution, spray 40~80kg solution per acre, once every 6~7 days, even spray 2~3 times; foliar spray in the afternoon Well, spray to the leaves is full of mist drops; if it rains within 6 hours after spraying, it should be sprayed once.
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