In recent years, small packaged seeds have brought great convenience to farmers and increased the value of seed commodities. However, due to the poor air permeability of the packaging, coupled with the different moisture content of different seeds, if the bag storage for a long time, under the conditions of poor storage conditions have a certain impact on the germination rate.
Small packaged seeds should control moisture
Before the seeds are packaged, they must be dried and the moisture should be reduced below the safe moisture level. Rice and corn varieties should be controlled below 13%, while seeds with higher oil content, such as oilseed rape, peanuts, sesame seeds, cotton, etc., must be reduced to below 8%-10%. The author chose the Shandan No. 4 produced that year. 13%, 14%, 15%, and 16% of corn seeds with 4 different water contents were 5 kg each, and then stored in the room at room temperature. The first germination test was performed at the time of storage, the second test was performed 180 days later, and the third test was performed 365 days later. If the seed moisture content is below 13%, the seed oxygen is weak, limiting the activation of the seed enzyme, so that the seed card is normally dormant. When the seed moisture content exceeds 14%, the seed inspiratory is enhanced and the seed's respiratory intensity also increases with the increase of the seed moisture content. In the packaging bag, there will be no oxidation, and a large amount of harmful gas will be generated inside the bag, causing the embryo to suffocate and die.
Small package seeds should be carefully selected to remove impurities, empty grains
Generally, there are some differences in the seeds that have just been acquired. Before the packaging, it should undergo a rigorous selection and grading process to remove empty pods, destroy grains, insect pods and various impurities. When the standards are basically the same, they are mixed and mixed. Otherwise, the quality of seeds will be affected. For example, if the seed with low purity is mixed in the seed pile with high purity, it will not only reduce the use value of the latter in production, but also It will affect the stability of the seeds during storage. Seeds with low purity tend to absorb moisture and cause moisture transfer in the seed heap, causing the seed to lose its usefulness.
Small package seeds should do 4 "not packaged"
One is that different crops and different varieties can not be packaged; when the moisture exceeds the standard, they cannot be packaged; third, the seeds with insects cannot be packaged; fourthly, the seeds whose purity is not up to the standard cannot be packaged; and the fifth, the new and old seeds are packaged separately.
Small package seeds should be stacked
After being packed in the warehouse, the stacking should be 50 cm from the wall and 60 cm apart from the malleolus. The stack height and width depend on the degree of seed drying. Seeds with higher moisture content should be lower and narrower to facilitate ventilation. Dry seeds can be higher and wider. The direction of stacking should be equal to that of doors and windows, and ventilation should be conducive to air circulation. Small packaged seeds should be protected against insects, mold, and rodents.
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