Although boron fertilizer has been used in rapeseed production for many years, it has been recognized by many farmers. However, with the transfer of most knowledgeable labor in rural areas, there are some deviations in the application of boron fertilizer in rapeseed production among the remaining vulnerable groups. The first is that some farmers pay more attention to nitrogen, phosphorus, and potassium fertilizers. It is irrelevant to consider that the application of boron fertilizer to rapeseeds does not matter. Second, some farmers only use boron fertilizer in base fertilizers and ignore topdressing boron fertilizers. It is believed that the application of boron fertilizer at seedling stage has no significant effect, and does not recognize the symptoms of boron deficiency at the seedling stage. Fourth, it does not pay attention to the quality of boron fertilizer, and only uses low-content (effective boron content 5%) and low-priced boron fertilizer; Although boron fertilizer was applied, the application amount was insufficient.

The above problems have manifested in one way or another in different rapeseed areas. In order to properly and better understand the application of boron in rapeseed, it is necessary to raise awareness and apply it accurately in order to exert the fertilizer effect.

First, understand the symptoms of boron deficiency in rapeseed. The response of rape to boron deficiency is very sensitive. In different stages of birth, symptoms of boron deficiency can be revealed. Boron deficiency at seedling stage, small and fine roots, swollen roots and necks, brown leaves gradually withered; leaves lacking boron leaflets in buds and pods, yellow and yellow veins around the leaves, vertical purple patches at the base of leaves; boron-deficient flowers at flowering stage The defense shrinks, the buds shrink or even dry, the capsules do not swell or deform, and there are haze, usually called flowers but not real, and some flowers are flawless. It can be seen that boron deficiency in rapeseed will have different degrees of influence during the whole reproductive period.

Second, we must understand the role of boron fertilizer. In the rapeseed production process, boron fertilizer can not be deleted because boron fertilizer can promote the synthesis of ribonucleic acid and the germination of pollen tubes, accelerate the growth of meristems and prevent flowering; it can promote the conversion of carbohydrates in the body and accelerate the growth of sucrose. Formation and hydrolysis of starch; 3 can enhance cell wall control of water, enhance resistance to cold and disease resistance of rapeseed, reduce the incidence of sclerotinia disease by 28.6% to 68.8%; Fourth, oil content of rape can be increased by more than 6 percentage points; It can promote rapeseed production by about 15%.

Third, boron fertilizer should be applied in batches in batches. One is to apply basal fertilizer before planting, apply about 1 kilogram of borax per acre or hold 0.3-0.5 kilograms of boron; second, use transplanting seedlings, plant 2 to 3 days before planting, spray 0.1% to 0.2% borax per acre seedbed Solution 40 kg, or 0.2% boron and rooting when planting; Third, wintering period after planting, spray 0.2% of Sorole Boron solution per acre 40 to 50 kg; fourth is spraying 0.2% Sulu boron solution 50 ~ 60 kg per mu; Fifth, the initial flowering period of 0.2% of the Sulu boron solution 60 kg per mu.

Fourth, pay attention to the quality and application method of boron fertilizer. The borax pure boron content is 10.9%, the pure boron content of boron sludge is 0.5% to 2.0%, the pure boron content holding boron is 15%, and the pure boron content of Sonic Boron is as high as 20.5% to 21.6%. Sonic boron can be quickly absorbed by crops, holding boron for more durable fertilizer. Borax, boric acid should choose the official manufacturer's authentic compliance products. In terms of application technology, the first one is to apply boron fertilizer according to the lack of boron in the soil. The severe boron deficiency requires both base fertilizer and top dressing. Second, when base fertilizer is used, it is better to mix with decomposed farm manure or commodity organic fertilizer. Application; The third is for top dressing, one should be fully dissolved, and the other is to control the amount of the third, whether to re-spray, no leakage spray; Fourth, can be mixed with urea or pesticide spraying.

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