The latest cause of sunflower yield reduction

Sunflower is not only a kind of high ornamental flower plant. It is also a major oil and food crop in China, and its seeds are the melon seeds that are common in our daily life. It is very popular in our country, and it also has a large planting area. However, many people tend to reduce their production when planting sunflowers. So what is the reason for the reduction in sunflower production? The following editor will give you a brief introduction, let's have a look!

1. Drought

Although sunflower is a kind of crop with strong drought resistance, it does not mean that sunflower needs less water in its growth. On the contrary, sunflower is a crop with high demand for water. According to the investigation, for every dry matter produced by sunflower 1kg, the moisture requirement is about 500kg. During the period from the budding stage to the end of flowering, the sunflower has the greatest water demand. In the whole growth of sunflowers, the proportion of water demand in this period is about 60%. If there is a shortage of water in this period, it will lead to poor pollination and abortion of sunflowers, thus reducing the yield.

2. Improper management

When planting sunflowers, management is very important, and poor management is also one of the main reasons for the reduction of sunflower production. However, the management problems are mainly among some small-scale growers. For many small-scale growers, they are only responsible for sowing and harvesting sunflowers. But like some basic water and fertilizer management, pest control and other management work has not been done in place. Especially in the critical growth period of sunflower, the lack of water, fertilizer and water will seriously hinder the growth of sunflower, increase the rate of empty grain and reduce the yield.

3. Poor pollination

The position of the male and female flowers of sunflowers is different, and the stamens generally mature earlier than the pistils. Therefore, the male and female flowers of sunflower have incompatibility and are prone to self-flowering. In addition, sunflower is a kind of cross-pollinated crop, which is mainly pollinated by insects. Therefore, if there is a lack of pollination media, the pollination seed setting rate of sunflowers will be reduced, and so will the yield. And in recent years, due to the unrestricted use of chemical pesticides, resulting in a decline in the number of insects, if artificial pollination is not done well, then the pollination rate of sunflowers will be very low.

4. Environmental impact

After entering the flowering and pollination period, if sunflowers encounter cloudy and rainy days, the flowering will be delayed, resulting in poor quality and less blooming. As a result, the maturation of the male pistil will be delayed in case of hot and dry weather. Then it will advance the flowering stage of sunflowers, resulting in insufficient amount of pollen, unable to carry out normal pollination and fertilization. And in cloudy and rainy days, bees and other major pollinating insects will also stop their activities, affecting the pollination of sunflowers.

The above is a brief introduction of the reasons for the reduction in sunflower production. That's all for today's introduction. This article is for reference only. I hope it can help you all.