The role of boron fertilizer and symptoms of boron deficiency

Boron can promote the operation and metabolism of sugar in crops, increase the synthesis of sucrose, accelerate the transport of sucrose, thereby increasing the seed setting rate and the fruit set rate of fruit trees. Boron can promote the formation and development of reproductive organs. Can develop normally. 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 cell division and elongation, and elongation favorable to the growth of plant roots; boron can enhance crop drought, disease resistance capacity. When crops boron deficiency, abnormal growth point growth or stagnation, or even death; leaves deformity, wrinkled, irregular chlorotic between the veins, the lower part of the old leaves become thick and yellow-green or dark purple spots appear, the 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.