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Three misunderstandings of boron application in rape and corresponding countermeasures
Brassica napus is a boron-tolerant crop, especially B. napus, which is particularly sensitive to boron nutrition. The lack of boron can lead to poor growth of rapeseed, especially the degradation of buds and pods, resulting in the phenomenon of "flowering but not real", resulting in a significant reduction in rapeseed production, even in severe cases. The content of boron in China's soil is generally low, which cannot meet the needs of rape growth. Therefore, boron must be used to make up for the deficiency. However, in practice, farmers' friends must use the following three misunderstandings when applying boron to rape: Misunderstanding 1: Boron is a nutrient element, and the more the rapeseed, the better. Although boron is a necessary nutrient for rape growth, it is a trace element and must be strictly controlled. If excessive application of boron, not only can not promote the growth and development of rape, but will have a serious inhibitory effect on seed germination, emergence, growth, resulting in "boron poisoning." In general, the base fertilizer should be 0.5-1 kilograms of borax Mushi, and 0.2-0.4% borax aqueous solution 50 kilograms per acre is appropriate. Misunderstanding 2: The lack of boron will cause rape to be "flowering but not real", so the boron spray effect is best during flowering period. It is well-known that boron is needed throughout the growth stage of rape, and boron is usually sprayed at the seedling and bud stage, and it is too late to spray boron during the flowering period, and the effect is poor, and boron injection is basically ineffective during the grain formation cycle. Misunderstanding No. 3: The quality of boron fertilizer products sold on the market is considered to be effective and effective after application. At present, there are many kinds of boron fertilizer products sold on the agricultural capital market, and their quality is not the same. Some boron fertilizers look no different from high-quality boron fertilizers. In fact, the boron content is only a few percent. Almost no boron, such boron fertilizer will undoubtedly have a serious impact on the growth and yield of rape. Therefore, when you purchase boron fertilizer, be sure to go to the regular agricultural resources sales sales department to purchase, and do not buy inferior boron fertilizer for the sake of getting cheap. (Source: Anhui Rural Network)