What are the varieties of sunflowers? How to fertilize? Fertilizer matters needing attention reference!

Sunflowers are native to South America, initially for ornamental use, and later cultivated in China. Sunflower seeds called sunflower seeds, often fried as a snack to eat, delicious, can also extract sunflower seed oil for consumption, oil dregs can be used as feed. What kinds of sunflowers do you have? How to fertilize sunflowers? What are the matters needing attention in fertilizing sunflower?

What are the varieties of sunflowers?

The main results are as follows: 1. The spherical and naturally dwarfed plant shape of sunflower "Baqiduo" is very suitable for container planting, with a height of only 50 cm, dwarf, compact plant shape, and can produce a large number of branches. these lateral flower heads ensure that the plant forms a full ball. It takes only 60 days from sowing to flowering, and there are five colors: Golden Black Heart, Golden Yellow Heart, lemon Yellow, Red and Red Yellow.

2. Sunflower "wow" is a sunflower variety with a large number of gorgeous golden flowers and green decorative leaves. The plant is 90 centimeters high, the luxuriant flowers bloom at the top of the plant, and the black heart sets off the golden petals. Its extremely decorative dark green leathery leaves are also very charming. It has a long life and usually blossoms later than other sunflowers, so it is an ideal plant material to bring colorful colors to the end of summer.

3. Sunflower "Autumn time" is a breakthrough sunflower variety with a plant height of 120 centimeters. It is the first medium-high sunflower mixed color variety with golden yellow, red and brown flowers. The trunk can produce a large number of branches and is very suitable for cutting flowers.

4. Sunflower "Jinhui" is a very eye-catching sunflower variety, which can grow a large number of golden flower heads and form a golden isolation zone. Plant height 160 cm, crown width 90 cm, with a strong branching, the plant is very compact. Bloom extremely luxuriant, bright golden yellow flowers, flowers up to 15 cm in diameter. It takes only 60 days from sowing to flowering, so it is an ideal cut flower variety.

Second, how to fertilize sunflowers?

In the growing period, sunflowers are usually fertilized once in about 20 days, and 2-3 thin phosphorus and potassium fertilizers should be added before flowering. The specific time of fertilization is determined according to the planting time of sunflowers, and attention should be paid to keeping the soil moist after fertilization.

What kind of fertilizer should be applied to sunflowers

1. Base fertilizer

Variety: mainly with organic fertilizer, supplemented by chemical fertilizer.

Fertilization method: mix fertilizer evenly in the soil before planting seedlings, or dig a 2-3 cm hole around the plant after planting to include fertilizer.

Dosage: 5: 10g organic fertilizer per plant, how to apply fertilizer if it is planted sunflower on a large scale? The amount of organic fertilizer needed per mu is 1000-2000 kg, while that of nitrogen fertilizer is 5-8 kg.

2. Planting fertilizer

Variety: phosphate fertilizer

Fertilization method: within 3-5 days after seed germination, fertilizer is sprinkled on the surface of the potted soil, or within 2-3 cm next to the seed.

3. Topdressing

Varieties: nitrogen fertilizer, potash fertilizer, urea and so on.

Fertilization method: dig a small hole 10-15 cm away from the sunflower, apply fertilizer in the small pit, and be careful not to let the fertilizer come into direct contact with the root system of the sunflower.

4. Foliar fertilizer spraying

After the sunflower budding, we also need to spray fertilizer on the leaf, so how to fertilize the sunflower at this time? Spraying 0.005% zinc, copper, manganese and molybdenum solution on the leaves of sunflowers can promote their flowering, make their flowers brighter and their leaves greener.

Matters needing attention in fertilization of sunflower

1. Pay attention to quantity rather than nutrient content

Some people think that it is OK to fertilize sunflowers as long as the quantity is enough, without paying attention to the content of nutrients it needs. This is a relatively common misunderstanding. When fertilizing sunflowers, we should pay attention to the proportion of nitrogen, phosphorus and potassium in the fertilizer.

2. Fertilizer is sprinkled on the stem of the plant during fertilization.

It is believed that spraying fertilizer on the stem is beneficial for the plant to absorb nutrients, but in fact this is wrong, because the main part of the nutrient absorption of sunflowers is in the root hair area, which may lead to too much fertilizer if sprinkled on the stem step.

3. Apply fertilizer when the sunflower is short of fertilizer.

When we introduced what to do when the sunflower leaves turned yellow, we mentioned that there was a lack of fat yellow, and this situation was actually caused by the misunderstanding of fertilization. many people thought that it was necessary to apply fertilizer only when the sunflower was short of fertilizer, but this would lead to a reduction in its yield.

4. it will have a fertilizer effect immediately after fertilization.

Some people think that there will be fertilizer effect immediately after fertilization, but the absorption of fertilizer by sunflowers will be affected by many factors, such as moisture, temperature and so on.