Boron is a trace element, and its biological functions in crop plants are mainly to promote the absorption and distribution of phosphorus, maintain the dynamic balance of phosphorus, and have a positive effect on the synthesis, transformation, accumulation, and transportation of carbohydrates; The normal flowering of boron-rich crops, such as cotton and vegetables, plays an active role in coordination and supervision. Therefore, boron can prevent "bristle without flower" and "flowering but not real" disease, increase the seed setting rate, reduce empty grains, improve the quality content of seeds, thereby increasing the seed oil yield, viability and unit yield. Rape is particularly dependent on boron, and if the available boron content in the soil is below 0.3 ppm, it will reduce production due to disease. In the life of rapeseed, the most pressing period for boron is the seedling stage and the flowering period. The medium-late-maturing varieties are more boron-susceptible than the early-maturing varieties because of the long growing period and the large amount of requirements. The rapeseeds grown in production are mostly During late-season seeding, when transplanting rapeseed, Daejeon must use enough base fertilizer, including 0.5 to 1 kg of boron fertilizer, or top-dressing seedling fertilizer within 5 to 7 days after transplanting, using 0.5 to 1% boron. Fertilizers were watered on a per plant basis, or sprayed two or three times (interval 7-10 days) with 0.1-0.3% boron fertilizer at flowering. The above boron application method is also suitable for use in boron-containing crops such as cotton and cruciferous vegetables. Production practice proves that only this technology can increase production by 23%.
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