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Why is it necessary to dry rice before sowing?

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, Rice seed drying before sowing can effectively improve seed germination rate and germination potential, the main reasons are: 1. Seed drying can promote seed ripening and improve enzyme activity. After harvest, although the rice seeds are dried and cleaned before entering the warehouse, due to maturity and dryness

Drying rice seeds before sowing can effectively improve the germination rate and germination potential of seeds, the main reasons are:

1. Seed drying can promote the ripening of seeds and improve the activity of enzymes. After harvest, although rice seeds are dried and cleaned before entering the warehouse, due to different maturity and dryness, the air humidity and temperature will also change during storage. if the seeds absorb moisture, the respiration is exuberant, and the nutrients in the seeds are consumed more, it often leads to the weakening of seed germination ability and germination potential, which can enhance the passing of seed coat, make it absorb water evenly during seed soaking, and improve the activity of enzyme.

2. Seed drying can promote oxygen into the inside of the seed, and free oxygen is needed for seed germination. Oxygen is the first condition for seed embryo to form gibberellin or to transform bound gibberellin into free gibberellin. Gibberellin can induce the formation of a-amylase and catalyze the degradation of starch into soluble sugars for seed embryo respiration and the formation of new cells in young roots and buds.

3. Seed drying can reduce the concentration of endamine A, amine B, abscisic acid and vanillic acid. When the concentration of these substances is high, it can inhibit germination.

4. The short-wave light in the solar spectrum, such as ultraviolet light, has germicidal ability, so drying seeds has a certain germicidal effect.

The method of drying the seeds: spread the seeds thinly on the mattress or on the cement floor, bask in the sun for 2 days and turn them frequently to make the seeds dry in the same way.

 
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