Sunflower empty shell rate is too high how to do? Strengthening sunflower pollination management is the key

Sunflower, also known as sunflower, has a good meaning of positive sunny. Sunflower seeds, also known as sunflower seeds, can be fried into melon seeds for market sale, and the sales volume is high. Sunflower cultivation is also distributed in many areas, extremely widespread. However, when planting sunflowers, they will encounter empty shells very frequently, and then greatly affect the yield of sunflower seeds. Next to help you understand how to prevent the phenomenon of empty sunflower shell.

Strengthen the management of sunflower pollination

During sunflower planting, pollination is a very important step. Without pollination such as bees and insects, its empty shell rate would be about 60%. However, if there are bees, insects and other pollination, the empty shell rate of sunflowers will be greatly reduced, only about 15%. So sunflower growers can raise bees while growing sunflowers, and then artificial pollination can be carried out during pollination to reduce the empty shell rate of sunflowers.

Improve the water and fertilizer conditions of sunflower

Sunflowers need much more nutrition than ordinary crops, so there must be more water and fertilizer. Sometimes, because the conditions of water and fertilizer can not keep up, the empty shell rate of sunflowers is sometimes as high as about 50%, which is a more serious reason. Therefore, we must be willing to water and fertilizer, there are high-quality water and fertilizer conditions, the probability of sunflower shell will be greatly reduced.

Fertilization for different periods of time

If the growth stage of sunflower is different, so the type of fertilizer used will be different.

The main results are as follows: 1. At the initial stage, the base fertilizer is mainly organic fertilizer combined with chemical fertilizer.

2. In the middle stage of planting fertilizer, ammonium bicarbonate or a small amount of urea will be used as seed fertilizer in order to ensure that the disk can grow smoothly.

3. In the later stage, the development of sunflower disk needs topdressing, because sunflower is a kind of crop with more fertilizer, so nitrogen fertilizer is generally used, and then some ammonium bicarbonate and ammonium nitrate are added to ensure the expansion rate of sunflower planting.

Fork the sunflower by hand

Because most sunflowers produce many branches in the middle and upper part of the stem in the process of growth and development. These branches can also form a disk when there is plenty of water and fertilizer, but the disk will be aborted due to the lack of nutrition due to the growth of multiple discs on one stem. Therefore, in order not to let the branches of the stem affect the normal growth of sunflowers, they will be forked by hand. To ensure that sunflowers can thrive and reduce the rate of empty shell.