How to improve the seed setting rate of sunflower

Sunflowers may be some people like to eat melon seeds favorite flowers, in fact, sunflower seeds can not only be processed into melon seeds for consumption, but also can be used to extract oil. It is a kind of economic crop for food and industry, and it also has a certain ornamental value, and its planting prospect is good. But many people will find a problem when planting, that is, the seed setting rate of sunflowers is low. So how can we improve its seed setting rate? Details are as follows:

1. Base fertilizer

Sunflower grows taller and has luxuriant roots and leaves when it grows up, so it needs a lot of fertilizer. Before planting, we should fully apply the base fertilizer, which should include comprehensive nutrients such as farm manure and compound fertilizer. To ensure that there is an adequate supply of nutrients in the growth process of sunflower, according to the fertility of the soil to learn from each other, increase the amount of missing nutrients in the soil in the base fertilizer, improve the seed setting rate and yield of sunflower.

2. Density

According to the variety and planting area of different planning planting density, planting density must be moderate, too thin will lead to excessive plant growth, sunflower disk area becomes larger, resulting in more nutrition, resulting in more empty grains. However, too dense planting will lead to short plants and smaller disk, which will also increase the phenomenon of empty grains and reduce yield and seed oil content. Therefore, the planting density should be controlled according to the actual situation and the surrounding environment.

3. Topdressing

As mentioned just now, sunflowers need a large amount of fertilizer, so we should not only apply sufficient fertilizer, but also carry out appropriate topdressing work, so as to meet the nutritional needs of sunflowers at all stages. The period when sunflower needs the most fertilizer is in the bud stage and flowering stage, when topdressing is needed. Nitrogen, phosphorus and potassium fertilizer can be used to control the proportion. However, nitrogen fertilizer should not be applied at the later stage of growth, as it may cause sunflowers to grow green and mature late.

4. Watering

Sunflowers are more drought-resistant, because the water storage capacity of sunflowers is well watered, and some growth stages of sunflowers are in great need of water. For example, in the budding stage and flowering stage, the water demand of these two stages may reach half of that of planting, so it is necessary to ensure the supply of water. If sufficient water is not provided, it will have a certain impact on the growth and development of the disk. Therefore, we should properly water the sunflower according to the growth stage and soil water content to promote the growth and improve the seed setting rate.

5. Disease

Disease control is very important, and the success of disease control is directly related to the seed setting rate. Sclerotinia sclerotiorum is the most harmful disease to sunflower. Sclerotinia sclerotiorum will directly rot the disk, seriously reduce the seed setting rate, and even give no production. There is a very high incidence rate every year. We need to prevent pesticides according to the onset time of Sclerotinia sclerotiorum. We can use pentachloronitrobenzene and fine sandy soil to sprinkle on the sunflower planting soil, then plough it once, and spray it again half a month later. It can be effectively prevented.

These are the ways to improve the fruiting of sunflowers. In fact, the editor talks about some factors that will affect the seed setting rate. If the management is not in place, these factors will have a great impact on the seed setting rate. It should be noted that the drugs for the treatment of Sclerotinia sclerotiorum disease need to be sprayed at the best temperature for sclerotia germination when the temperature reaches about 20 degrees in order to effectively control it. This article is for reference only. I hope it can help you.