Linyi Fertilizer Network Copyright
After the spring, rapeseed enters the vigorous period of vegetative growth and reproductive growth. It needs to absorb a large amount of nutrients. Therefore, scientific fertilization should be carried out according to soil quality, climate and fertilization before spring, combined with seedlings. Linyi Fertilizer Network Copyright
1, early application of spring fertilizer: early spring topdressing can remedy the lack of winter growth of rapeseed, promote multi-branches, early bud. Especially for rapeseed with insufficient base fertilizer and no fertilization, it is the key to capture high yield in early spring. Generally, the urea is 5-8 kg of urea or 10-15 kg of ammonium carbonate. Linyi Fertilizer Network Copyright
2, skillful application of manure: fertilization in rapeseed buds should be treated according to the growth of rapeseed. For the weak seedlings, the fields with poor growth potential should be applied early, that is, when the height is about 50 cm, the manure is 15-20 tons of manure, and 5 kg of urea or 45% of compound fertilizer is 10-15 kg; In the field where the growth is strong and the leaves are dark green, the manure should be delayed or applied less. Linyi Fertilizer Network Copyright
3, foliar spray: rapeseed is very sensitive to boron, and needs a large amount. In winter and spring, most of China's wintering rapeseed suffered severe and persistent drought, which has a great impact on the normal growth and development of rapeseed. Due to the continuous drought, the effectiveness of "boron" in the soil is greatly reduced, and the roots of the crop can not be absorbed, which leads to the shortage of boron in the rapeseed plants, the flower is not real, and the yield is severely reduced. Therefore, special attention should be paid to the application of boron fertilizer to the drought rapeseed. Even in rapeseed fields where boron fertilizer has been applied at the time of sowing or transplanting, foliar spray is required for flowering. Linyi Fertilizer Network Copyright
The rapeseed leaf surface is sprayed with boron. This year, it should be robbed in the buds to the initial flowering stage. The soil is sprayed with 0.1% of syllabic boron or 0.5% of borax aqueous solution of 60 kg, and sprayed 2-3 times evenly (1 time more than normal). If the amount of boron fertilizer is insufficient or the amount of liquid used is not enough, the effect of increasing production should not be achieved. In addition, we must also pay attention to the quality of the purchase of boron fertilizer, to prevent the use of fake boron fertilizer to cause labor and work. Linyi Fertilizer Network Copyright
Potassium fertilizer application: In order to improve the resistance of rapeseed to lodging, disease resistance and waterlogging, the application of potassium fertilizer has obvious effects. Especially for potassium-deficient soils such as sandy soil and paddy fields, the application of potassium fertilizer can increase the yield. From late February to mid-March, it can be applied with grass ash, about 150 kg per mu or 15 kg of potassium chloride. Linyi Fertilizer Network Copyright
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