The effect of boron fertilizer on rapeseed

The effect of boron fertilizer on rapeseed

Practice has proved that the application of boron fertilizer is the most effective measure to prevent the lack of boron in rape, and the application of boron fertilizer can also promote the robust growth of rapeseed plants, increase the number of results, so that rapeseed production increased by about 10%, a serious shortage of boron in the field Boron can increase production by more than 15%. In terms of production, reasonable application should be made according to the nature of boron fertilizer, soil and cultivation conditions, and the nutritional characteristics of boron boride. First, master the types and properties of boron: boron is a trace of high-efficiency fertilizer. Compared with nitrogen, phosphorus, and potassium fertilizers, the demand for rapeseeds is relatively small, and the boundary between appropriate and excessive amounts is very small, and overdose often produces poisoning. At present, the most commonly used boron fertilizer in domestic rapeseed production is borax (sodium salt of boron), which is low in price and convenient to use. The content of boron is 11%, and the active ingredient is less than boric acid, but the use effect is the same. In addition, there are boron-containing compound fertilizers, such as phosphorus-boron fertilizer, or nitrogen, phosphorus, potassium, boron compound fertilizer. As these elements are all essential elements for the growth and development of rapeseed, the effect of increasing yield on rapeseeds is significant. Second, boron as a base fertilizer directly applied to the soil: Before sowing rapeseed or transplanting, per acre with borax 0.5 to 1 kg and other fertilizers mixed base fertilizer application. Since boron has an inhibitory effect on seed germination and radicle growth, avoid direct contact between boron and seed. When fertilizing, mix the boron fertilizer with fine dry soil or other organic fertilizers, and apply the seed fertilizer by means of ditching or seeding. Do not make the seed (live) or the young root (transplanting) in direct contact with the boron fertilizer so as not to harm the seed and young. root. Third, foliar application of boron fertilizer: foliar spray boron fertilizer can be adjusted according to the characteristics of different fertility requirements fertilizer. It has a very good effect on the prevention and treatment of flowers. Spraying concentration (according to the weight of boron fertilizer) is 0.1-0.3%, that is, borax 0.1-0.3 kg plus 100 kg of water is prepared into a boron-containing aqueous solution, and the foliar surface is evenly sprayed. Leaves the foliage fully moist without dripping. Generally, the amount of solution sprayed per mu is about 50 kg at the seedling stage and 80 to 100 kg at the later stage. Spraying boron should be done on a sunny evening or in the morning. Do not spray when dry and windy. Rainfall should be reapplied within 36 hours of spraying. The key to fertilization of winter rapeseed with boron fertilizer is seedling stage (before and after flower bud differentiation) and convulsing period (vine height 15-20 cm), in which boron fertilizer can be sprayed once. The effect of spraying boron fertilizer during flowering and fruit development was poor. This is because spraying boron at the seedling stage can promote root growth, which is conducive to the normal development of flower bud differentiation, spraying boron at the bud stage, and promoting the extension of the stolon, so that the leaves will not be changed from green to red due to boron deficiency, and photosynthesis may be weakened. To ensure the normal development of buds and other reproductive organs to avoid the occurrence of flowers but not real. Therefore, spraying boron once during the seedling stage and the bud stage produced significant yield increase. In addition, 1 to 3 days before transplanting rapeseed, spraying boron on the seedbed is not only conducive to rooting and greening after transplanting, but also economical. Although there is a significant increase in yield of boron sprayed on the leaves, in areas with severe boron deprivation or in soils, such as low spraying frequency, boron spray often cannot ensure the need for boron in rapeseed in a timely manner, so the spraying effect is lower than that of base boron. fat. Fourth, other methods of boron: Boron acid per acre of 10 to 15 grams or 200 grams of borax or seed soaked in water containing boron for 12 hours, has the effect of improving rapeseed yield. However, due to the inhibitory effect of boron on the germination of seeds, the use of boron seed dressing soaking should be careful, under normal circumstances should not be used. In addition, when transplanting rapeseed, rooting with a 0.1% boron-containing aqueous solution has a certain effect on yield increase. The above two methods have the characteristics of strict technical requirements, inconvenient operation, and costly work. Therefore, they are rarely used in production.

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