Boron can promote the metabolism of the crop and the operation on carbohydrates, sucrose increased two synthesis, transport of sucrose accelerated, thereby increasing the rate of fruit set seed and fruit crops; boron promote the formation and development of reproductive organs, when boron deficiency, not seeds Normal development. It can not be formed at all, seriously affecting the yield and quality of crops; boron can promote the formation of cellulose and cell walls, regulate and stabilize cell wall structure. At the same time, it can promote the elongation and division of cells, which is conducive to the growth and elongation of crop roots; boron can enhance the ability of crops to resist drought and disease. When the crop is deficient in boron, the growth point grows abnormally or stagnate or even dies; the young leaves are deformed and shrunken, and the veins are irregularly chlorotic, and the lower old leaves are thickened and become dark yellow-green or purple-red spots, leaves and The stem becomes brittle; the root is short and the root system is underdeveloped; the pollen germination is blocked, the fruit formation is reduced, and the fruit and seeds are not full. The following are the symptoms of boron deficiency in several crops: when the tomato is deficient in boron, the cotyledons and true leaves of the seedlings are purple, the leaves are hard and brittle, the stems grow black and dry; the plants are all living, the top branches are curled inward and yellow. Death; fruit ripening period is irregular, deformed, the skin has brown erosion spots or black sputum. When the citrus is deficient in boron, the water spots are yellow spots, which are easy to fall off; the leaves are twisted, the fruit is stiff, the fruit is rough and thick, the pulp is hardened, the wood is hardened, the juice is less, and the seeds are rarely formed, forming stones. fruit.
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