Boron is one of the indispensable trace elements in the growth and development of rapeseed. The conversion and transportation of carbohydrates in the plant, as well as the absorption and regulation of water and nutrients, must have boron. Boron is also a nutrient element necessary for root growth and flowering and fruiting of rapeseed, and its yield-increasing effect is particularly obvious, and the yield can be as high as 80%.
After the boron deficiency of rapeseed, the main symptoms are root dysplasia, root neck enlargement, leaf deformity, small and hypertrophy, leaf margin curling and shrinking, flowering retardation, grain imperfection, etc., which have a great impact on yield, which can lead to serious No particles are collected.
If rapeseed is deficient in boron, it should be sprayed in time, as early as possible. Tests have shown that spraying boron fertilizer once in the seedling stage of rapeseed is about 15% higher than that without spraying. Sprayed once in the seedling and early flowering stages, which was 35% higher than the control field.
At present, the commonly used boron fertilizer varieties are borax, boric acid and boron magnesium fertilizer. Borax contains 11.3% boron, boric acid contains 17.5% boron, and boron magnesium fertilizer contains 1.5% boron. Spraying boron fertilizer on rapeseed is better to use borax and boric acid, and the dosage is less, and the yield increase effect is remarkable. The concentration of the two solutions is: borax 0.05-0.2%, boric acid 0.025-0.1%. First use a small amount of warm water to dissolve the boron fertilizer, and then thoroughly mix the necessary water, then spray it, 50-75 kg per mu of spray fertilizer. In order to improve the effect of spraying fertilizer, it is best to choose from 4 to 5 pm without wind. At this time, the evaporation of fertilizer liquid is small, which is good for leaf absorption.
After the boron deficiency of rapeseed, the main symptoms are root dysplasia, root neck enlargement, leaf deformity, small and hypertrophy, leaf margin curling and shrinking, flowering retardation, grain imperfection, etc., which have a great impact on yield, which can lead to serious No particles are collected.
If rapeseed is deficient in boron, it should be sprayed in time, as early as possible. Tests have shown that spraying boron fertilizer once in the seedling stage of rapeseed is about 15% higher than that without spraying. Sprayed once in the seedling and early flowering stages, which was 35% higher than the control field.
At present, the commonly used boron fertilizer varieties are borax, boric acid and boron magnesium fertilizer. Borax contains 11.3% boron, boric acid contains 17.5% boron, and boron magnesium fertilizer contains 1.5% boron. Spraying boron fertilizer on rapeseed is better to use borax and boric acid, and the dosage is less, and the yield increase effect is remarkable. The concentration of the two solutions is: borax 0.05-0.2%, boric acid 0.025-0.1%. First use a small amount of warm water to dissolve the boron fertilizer, and then thoroughly mix the necessary water, then spray it, 50-75 kg per mu of spray fertilizer. In order to improve the effect of spraying fertilizer, it is best to choose from 4 to 5 pm without wind. At this time, the evaporation of fertilizer liquid is small, which is good for leaf absorption.
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