Boron is one of the essential nutrients for the growth and development of rapeseed. Its boron content is 32.5-36 times higher than that of wheat and rice. When there are more plants in the field, the symptoms of boron deficiency are reduced by at least 2-3%. It’s almost never harvested.
The symptoms of boron deficiency in rapeseed are greatly different due to the difference in the degree of boron deficiency. In severe cases, the seedling stage is atrophied and died, and the lighter ones appear after flowering. The roots of the diseased plants are stunted, the roots are not long, the epidermis becomes brown, some of the roots are swollen, and the cortex is cracked. The leaves initially turn dark green, the leaf shape becomes smaller, the leaf quality thickens, becomes brittle, the leaf ends are rolled back, and the wrinkles are uneven. It then turns purple from the edge of the middle blade below and develops into the interior to form a piece of blue purple spot. Finally, the entire blade turns yellow and falls off early. After convulsion, the growth point shrinks or dies, the embryo stem splits, the transport system and fertilization are destroyed, the carbohydrates are retained in the leaves, the flowering is slow, the inflorescence is shortened, the small branches are clumped, the flowering is not strong (commonly known as “flashyâ€) or the grain Not full, short angles at maturity, such as radish horns. The epidermis and stem skin become purple-red or blue-violet, with longitudinal slits in the middle and lower cortex of the stem, and cracks appear in the upper part.
Prevention and remedial measures: 1 Soil with serious boron deficiency, 0.51 kg of borax is used as the base fertilizer when planting the soil; the rapeseed transplanted with seedlings is applied with 15-25 kg of boron and magnesium fertilizer before transplanting, and the effect is good. 2 In the rapeseed seedling stage, before the convulsion, at the early flowering stage or when the plant is found to be deficient in boron, the surface is sprayed with 0.10.2% borax solution.
The symptoms of boron deficiency in rapeseed are greatly different due to the difference in the degree of boron deficiency. In severe cases, the seedling stage is atrophied and died, and the lighter ones appear after flowering. The roots of the diseased plants are stunted, the roots are not long, the epidermis becomes brown, some of the roots are swollen, and the cortex is cracked. The leaves initially turn dark green, the leaf shape becomes smaller, the leaf quality thickens, becomes brittle, the leaf ends are rolled back, and the wrinkles are uneven. It then turns purple from the edge of the middle blade below and develops into the interior to form a piece of blue purple spot. Finally, the entire blade turns yellow and falls off early. After convulsion, the growth point shrinks or dies, the embryo stem splits, the transport system and fertilization are destroyed, the carbohydrates are retained in the leaves, the flowering is slow, the inflorescence is shortened, the small branches are clumped, the flowering is not strong (commonly known as “flashyâ€) or the grain Not full, short angles at maturity, such as radish horns. The epidermis and stem skin become purple-red or blue-violet, with longitudinal slits in the middle and lower cortex of the stem, and cracks appear in the upper part.
Prevention and remedial measures: 1 Soil with serious boron deficiency, 0.51 kg of borax is used as the base fertilizer when planting the soil; the rapeseed transplanted with seedlings is applied with 15-25 kg of boron and magnesium fertilizer before transplanting, and the effect is good. 2 In the rapeseed seedling stage, before the convulsion, at the early flowering stage or when the plant is found to be deficient in boron, the surface is sprayed with 0.10.2% borax solution.
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