What fertilizer is good for growing oil sunflower?

Fertilizer for growing oil sunflower

The role of basal fertilizer is to provide the nutrient needs of oil sunflower throughout the entire growth period. Basal fertilizer should be mainly organic fertilizer, such as livestock manure, poultry manure, compost, green manure, soil and miscellaneous fertilizers, etc. These fertilizers have a long fertilizer effect and are rich in nutrients. After fertilization, they have a good effect on improving soil fertility and sunflower yield.

In addition, we also need to add an appropriate amount of chemical fertilizers, which can not only meet the demand for quick-acting nutrients in the seedling stage, but also be beneficial for subsequent growth, especially when no organic fertilizer is applied or the amount of organic fertilizer applied is small, corresponding chemical fertilizers are needed to supplement nutrients.

Topdressing for oil sunflower

For topdressing of oil sunflower, generally 10-15 kg of urea or 50 kg of ammonium carbon is applied per mu, applied in strips or holes. Boron fertilizer has a good yield-increasing effect on oil sunflower, so more boron fertilizer should be applied. 150 kg of borax can be mixed with seeds per mu, or borax aqueous solution can be sprayed before flowering.

Fertilizer for oil sunflower growing season

When the oil sunflower enters the flowering and filling stage, the vegetative growth is transformed into reproductive growth, and the fertilizer requirement reaches its peak. Foliar spraying with urea solution has a significant effect on increasing production. Spraying 1:3:3 nitrogen, phosphorus, and potassium solution when the oil sunflower blooms can greatly increase production and further improve the quality of sunflowers, ensuring that the number of seeds per 50g reaches less than 320.

Fertilizer for oil sunflower fruiting period

In the later stage of sunflower growth, it is easy to lack fertilizer. When it is difficult to carry out root fertilization, it is necessary to adopt the method of foliar spraying. You can use diluted potassium dihydrogen phosphate solution, or add urea, spray once every 7 days during the flowering period, and spray twice in a row.

The correct method of fertilizing oil sunflower

Before planting oil sunflowers, you can mix the fertilizer evenly into the soil. You can also dig 2-3 cm deep holes around the planted plants and apply the fertilizer into them. Pay attention to the depth of fertilization. Don't apply it too close to the root system. Apply it in the wet water layer so that the fertilizer can be better effective.

Matters Needing Attention in Fertilizing Oil Sunflower

Oil sunflower absorbs nutrients rapidly and abundantly from disk formation to flowering period, which is a critical period for nutrition. During this period, the amount of nutrients absorbed accounts for about three quarters of all nutrients. More phosphorus is needed from seedling emergence to disk formation, the most nitrogen is needed from disk formation to the end of flowering period, and the most potassium is absorbed from disk formation to wax maturity.