The cause and solution of Sunflower empty Shell

Sunflower is the flower of the sun, it has high ornamental value and economic value, it produces the melon seeds we eat every day, but there are often empty shells when planting? Affect its output, but also cause greater economic losses, so what is the reason for sunflower shell? Let's take a look at the detailed introduction of the pro-agricultural network.

Empty shell reason

1. Lack of water

According to the experimental proof, the empty shell rate of sunflower is related to moisture. In the case of sufficient water, the general empty shell rate is only 3% Mur4%, while in the case of insufficient water, the empty shell rate can reach more than 35%, or even all of the shell. Therefore, it is necessary to increase sufficient water during the growth of sunflowers, especially in the disk period, when the water demand reaches about half to 60% of the water requirement of the whole growth stage, which leads to insufficient water and poor seed development, resulting in empty shells.

2. Poor pollination

Sunflowers cross-pollinate crops, which also causes it to be pollinated by bees and insects, but in low temperature or rainy days, bees and insects have less activity, resulting in an increase in empty shell rate.

Solution method

1. Strengthen the management of fertilizer and water

There is a large water demand in the bud and flowering stage of sunflower, so we should provide sufficient water at this time, otherwise the plant will lack water and the empty shell rate will increase. In addition, in addition to watering, fertility is also essential, according to research, sunflowers for every 50 kilograms of sunflower seeds, need a certain amount of fertilizer, otherwise sunflower seed growth is poor, easy to dry up.

2. Artificial pollination

Since sunflowers are cross-pollinated crops, artificial pollination is necessary in order to improve the seed setting rate and reduce the empty shell rate. Artificial pollination is generally in the morning, must not be in the strongest noon sun, pollination in case of overcast and rainy weather, to do a good job to avoid rain measures, so as to avoid Rain Water erosion leading to pollination failure.

The above are the causes and solutions of the sunflower shell brought by the pro-agricultural network. In addition to the above two reasons, the sunflower shell is also caused by diseases and insect pests, and the prevention and control of diseases and insect pests can not be ignored when planting. This is related to the yield and quality of sunflowers.