High quality, high yield and stable production of rapeseed boron

Brassica napus is a boron-requiring crop, especially the high-yielding, high-quality cabbage “double-low” hybrid rapeseed is particularly sensitive to boron deficiency. The seedling boron-deficient roots are slow, the leaves are dark green, shrinking, and the growth is hindered; the buds lack boron and roots Inflated, the leaf color turns purple to blue-purple and the buds develop abnormally; the boron deficiency during flowering, plant dwarfing, pollen development are abnormal, and the seeds are few. Practice has proved that the application of boron fertilizer in areas with deficient boron generally increase 15–30% of rapeseed production. In areas with severe boron deficiency, boron can be used to increase production. The application of boron fertilizer is an important technical measure for high yield and stable production of rapeseed.

First, the correct application of boron fertilizer

Boron fertilizer can be used as basal fertilizer, top dressing and foliar fertilizer, but no matter which method is adopted, it must be based on the amount of boron in the soil and the growth of rapeseed field.

(1) As base fertilizer: The application of boron fertilizer is suitable for soils with moderate or severe boron depletion. The application of boron fertilizer at the end can ensure the continuous supply of boron and meet the demand for boron in each growth period of rape. Before the rapeseed direct seeding or transplanting, use 1 to 1.5 kilograms of borax per acre and farmyard manure, chemical fertilizer or fine soil to mix evenly or apply acupuncture points. When applying, avoid direct contact with boron seed or seedlings to prevent burns or inhibit growth.

(2) Foliar spraying: The foliar application of boron fertilizer has the advantages of saving fertilizer and quick absorption of crops, and can be effectively adjusted according to the characteristics of boron required for each growth period of rapeseed. This method should be used for basal fertilizers with insufficient amounts of rapeseed or medium, light boron deficient, and potentially deficient in boron. Foliar spraying should be started sooner rather than later. The best application period is the post-emergence period (before and after flower bud differentiation) and the bolting period (15 to 30 cm in fur), and it is applied in two times (about 15 days apart), every acre time. Spray 0.2% borax solution 40 ~ 60 kg. Seedlings or early flowering period can be used as auxiliary boron spraying measures according to the symptoms of boron deficiency, with a concentration of 0.1-0.2% borax solution 60 kg. Spraying is best before the evening of the sunny day. It is advisable to stick fog droplets on the front and back of the rape leaf. If it rains after spraying, spray it.

Second, the use of boron fertilizer should pay attention to the problem

1, strictly control the dosage: Although boron is a nutrient element necessary for rape growth, but it is a trace element, it must strictly control the amount of application, even if it is a serious boron deficient soil, borax dosage should not exceed 2 kg per acre, because excessive can cause crops Boron poisoning.

2, to master the spraying time: rape in the entire growth stage requires boron, spray generally in the seedling stage and bud stage is appropriate, the rape after spraying boron fertilizer production effect is not significant, flowering spray boron for the time Late, the effect is poor, and boron injection is basically ineffective during grain formation.

3, the use of high-quality boron fertilizer: At present, the agricultural products market sells a wide range of boron fertilizer products, some of the actual boron content is very low, and some almost no boron, such boron fertilizer will undoubtedly lead to boron deficiency and yield reduction in rapeseed Or no income. Therefore, we must go to the normal agricultural resources sales outlets to buy boron fertilizer.

4, it is best to use with other fertilizers: single application of boron fertilizer production effect is not obvious, boron fertilizer and organic fertilizer, nitrogen, phosphorus, potash fertilizer use, can give full play to the potential for yield increase.

Towing Rope

Towing Rope,Car Yellow Tow Rope,Roadside Emergency Tow Strap,Emergency Tow Strap For Car

Ningbo Zhihao Car Accessories Co.,Ltd. , https://www.zhihaoautoparts.com