Before sowing, wheat can prevent mildew and insects, promote ripening, increase germination potential and germination rate, and help strong seedlings increase yield. According to the experiment, the germination rate was 14.6% to 17% higher than the non-sun-dried wheat species, and the average yield increase was 14.5%. First, it can increase the germination rate of seeds and enhance the germination potential of seeds. After the wheat is damp, the endosperm near the seed coat is hydrolyzed into a paste-like substance, and the pores on the seed coat are blocked, which is not only unfavorable for absorbing water but also is not favorable for ventilation. Seed germination requires a certain amount of moisture and air. Inhalation of water is hindered, it will inevitably affect the seed germination. After drying, the seeds lose water and shrink, and the seed coat permeability increases. After sowing, it is beneficial for the seeds to absorb moisture and air, which can increase the seed germination rate and germination potential. Second, promote seed ripening. Under high temperature and dry conditions, drying seeds are conducive to the formation of assimilation substances, complete the physiological maturity of the seeds, and promote the seeds through the post-maturation phase. Third, can kill bacteria and pests. Through sun drying, ultraviolet rays in the sun can kill pathogens that adhere to the surface of the seeds and reduce wheat diseases. Such as smut, powdery mildew, and rust. Fourth, drying seeds can prevent mildew in the wet seed, and can also find some serious moldy seeds in time, so that the seed can be exchanged early and the farming time is not lost. The method of drying wheat is to select sunny and fine weather and evenly spread the wheat seeds on the mat (note that it cannot be directly spread on the asphalt or cement drying yard to prevent the seeds from being burned due to excessive temperature). The thickness is 10-15 cm. It is advisable to turn frequently during the day and pile it up at night. Generally, it can be dried for 2 to 3 days.
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