Rape is a crop that is highly sensitive to boron, and once it is deficient in boron, it will have typical symptoms of “flowering but not realismâ€, with low seed setting rate, less fruit pods, and poor quality. Boron deficiency also causes slow green return during transplanting, low survival rate, undeveloped root system at seedling stage, yellow or purple-brown leaves, high node branching, low number of branches, clustered branches, and clubroot disease caused by mid and late growth stages. , stem broken, lodging, etc., seriously affect the yield and quality of rapeseed. The application of boron fertilizer can promote the growth and development of rapeseed, significantly increase the yield of oilseed rape and increase the oil yield. Boron fertilizer can be used as basal fertilizer and foliar fertilizer. Good application of boron fertilizer is a crucial measure to ensure high yield of rapeseed. 1. Jishi. Boron fertilizer is the main way to ensure the supply of boron in rapeseed. The end of application of boron fertilizer is suitable for moderately or severely deficient boron soil, and 0.5 kg of borax is appropriate for mu, and it can be mixed with fine soil or organic fertilizer and chemical fertilizer to spread the ditch or apply a hole. It is worth noting that it is not appropriate to deepen or apply boron fertilizer. Even if the soil is seriously deficient in boron, the amount of borax should not exceed 2.0 kg/mu. Because boron fertilizer is a kind of micro-efficient fertilizer, the boundary between adequate and excessive amounts is very small. Excessive amounts often cause poisoning. Spice Novelties Co.,Limited , https://www.wholesale-adult-toys.cn
2. Foliar application of boron fertilizer. Based on the application of boron fertilizer at the end, spraying boron fertilizer on the leaf surface is a very economical and effective way to supplement boron, and it can be effectively adjusted according to the characteristics of boron needed for each growth period of rapeseed. The best application period is the post-emergence and bolting period, divided into two applications, each application of 100-150 grams of borax per acre (first dissolved with a small amount of hot water) against fresh water 50kg spray. In addition, in order to effectively improve rape seed setting rate, increase grain number and increase grain weight, it is better to use potassium dihydrogen phosphate mixed spray per acre, which is especially important for growth. The early flowering period can be used as an auxiliary boron spraying measure according to the symptoms of boron deficiency. Each application of borax 50-100 g per 80-80 kg water is appropriate. Spraying after 4 o'clock in the morning at 10 o'clock in the morning on the sunny day is best. Spray the leaves evenly to make the leaves moist enough without dripping.
In the application of boron fertilizer should pay attention to the combination of the basic application and foliar spray, boron fertilizer and nitrogen, phosphorus and potassium fertilizer application, will obtain higher yield and the greatest economic benefits.