What fertilizer is the safest for planting rape in rural areas?

First, do plantar fertilizer and apply seedling fertilizer early.

Rapeseed can be used as vegetable, and rapeseed can also be used as edible vegetable oil. Only one rice seedling is planted in our hometown. After rice is harvested in autumn, rapeseed is sown in the field and then transplanted. Every crop needs different nutrients at different growth stages, and it is no exception. Therefore, in order to obtain high yield and high quality of rape, it is necessary to apply sufficient base fertilizer and reasonable topdressing, and there are also many special fertilizers for rape in the market.

165438+1late October or early February 65438+early February, organic fertilizer is the main fertilizer, and organic fertilizer1500 ~ 2000kg is applied per mu. For some fields with poor growth, chemical fertilizers should be applied appropriately. Applying seedling fertilizer in the early stage has a long seedling stage and a large amount of fertilizer absorption. Therefore, it is necessary to apply seedling fertilizer in advance to promote the growth of rape before winter and ensure safe overwintering.

Second, it is suitable for fertilization.

The application of bolting fertilizer should be carried out when the bolting length of the main stem is 10 cm, and the field with good seedling potential in the early stage can be slightly delayed. The application amount is generally 20% of the total fertilization amount, but the fertility should be less than 20%, and the thin field can be more than 20%. The fertilizer is mainly organic fertilizer with compound fertilizer. Partial application of nitrogen fertilizer or late application or excessive application of nitrogen fertilizer can easily lead to diseases, lead to excessive growth and lodging, and reduce production. At this time, the rape is small, so it is more beneficial to fertilize beside the rape root, and the chemical fertilizer will not be sprinkled on the vegetable seedlings. Covering the excavated soil with chemical fertilizer can play the role of deep application. Apply organic fertilizer 1500 kg, rape fertilizer 20-25 kg or urea 10 kg per mu.

Third, skillfully apply flower fertilizer

Rape is an infinite inflorescence with long flowering period, flowering, pod setting and maturity. Therefore, before or at the initial flowering stage, temporary flower fertilizer should be applied to the seedlings to improve the pod setting rate and reduce pod dropping. Generally, 2 ~ 3 kg of urea or 7 ~ 8 kg of ammonium bicarbonate are applied per mu at the initial flowering stage. Those with sufficient fertility and good growth in the early stage cannot be applied. It is necessary to prevent the application of flower fertilizer too late and too much, so as not to cause greed and late maturity. Generally, 0.2 kg of potassium dihydrogen phosphate and 0.5 kg of urea can be used per mu in fertile fields, and then 75 kg of water can be sprayed in full bloom.

Supplementary application and spraying of boron fertilizer in the early bolting stage of rapeseed can avoid the disease of "flowering without fruit" and improve the seed setting rate. At the beginning of bolting, 60kg of 0. 1% ~ 0.2% borax aqueous solution or 50g of instant boron fertilizer (liquid boron fertilizer) and 60kg of water were sprayed each time, and the effect was good. The effect of spraying boron outside the root is more prominent when the base fertilizer is not applied with boron fertilizer.