As a staple food crop in southern China, rice occupies an important position in China. Rice is planted every year, so the selection of rice seeds is very important. The commercial rice seeds sold in the market are produced, processed and packaged in the first year, and sold the next year. Therefore, the storage of seeds is directly related to the quality of the seeds sold. So how to store rice seeds, the following explains the main points of rice seed storage.

1. Three precautions for sun-seeding

Due to dew in the morning, the moisture content of the seeds harvested in the morning is higher, which can reach 28% -30%, and the moisture content of the seeds harvested in the afternoon can reach about 25%, all of which have not reached the storage standard and need to be sown. Normally, 2-3 days in the sun on a sunny and sunny day can reduce the moisture content. However, the following three points should be paid special attention during the drying process:

The first is that it is not too early to sown in the morning. If the sown is too early, moisture transfer will occur due to the large temperature difference between the site and the heated seeds, resulting in insufficient sown seeds, which directly affects the sown seeding effect;

Second, it should be turned frequently during the drying process to prevent excessive temperature from causing waist exposure. Cement sites should pay more attention to this problem;

Third, if mechanical drying is used, care should be taken that the drying temperature should not be too high. The correct way is to slowly dry at the appropriate temperature to prevent burns to the seeds.

2. Grasp the two main points of storage standards

The first is to pay attention to temperature and moisture control: the factors that affect the storage of rice seeds are mainly temperature and moisture. According to relevant experimental data: rice seeds have a moisture content of 6% and storage temperature is 0 ° C, rice seeds can be stored for a long time; rice seeds contain Water content below 13% can safely survive the summer, and the bud rate is basically not reduced; rice seed moisture is higher than 14%, and the seed is stored until June of the next year, and the bud rate has a downward trend; rice seed moisture is stored in the warehouse above 15%, By August of the following year, the bud rate was almost zero. Therefore, it is important to pay attention to the seed moisture before entering the warehouse, and it is best to control the moisture below 13% before entering the warehouse.

Second, the seeds should be cleaned and cleared before entering the warehouse to prevent impurities or other varieties from causing purity issues, and the stored seeds should be fumigated according to relevant requirements.

Third, the seeds should be selected before they are put into the warehouse to ensure the progress of the seeds.

3.Notes after storage

The activity of rice seeds will be affected by smoking. Therefore, you should pay attention to various smoking effects during storage, especially away from the kitchen; use bulky bags (sacks, textile bags, etc.) for bulk seeds during storage. Pack seeds with poorly permeable plastic bags; do not mix them with pesticides, fertilizers and other agricultural products and store them in the warehouse. The volatilization of other agricultural products will affect the activity of rice seeds; pay close attention to the temperature in the warehouse after entering the warehouse. (Check every three days within 15 days after storage, and check every 10 days or more frequently in the future), and check the seed moisture at the appropriate time (measured quarterly in the spring, autumn, and winter seasons, the seed moisture in the library, and every summer Monthly measurement of seed moisture in the reservoir).

4. Special precautions for low temperature cold storage

If there are too many seeds produced that year, and the seeds need to be stored for more than one year, it is best to store them in a low temperature cold storage. The seeds in the cold storage should be kept at a temperature of 15 ° C and the relative humidity in the storage should be controlled at about 65%. Special personnel should be arranged to check the temperature and relative humidity in the cold storage at a fixed time every day. If abnormal conditions are found, they should be handled immediately.

5.The four major indicators of the seeds should be tested before they are shipped out of the packaging.

The purity of conventional field seeds is not less than 99%, the purity is not less than 98%, the bud rate is not less than 85%, the water content of indica rice is not less than 13%, and the water content of japonica rice is not less than 14.5%.

The purity of hybrid field seeds is not less than 96%, the purity is not less than 98%, the bud rate is not less than 80%, the water content of indica rice is not less than 13%, and the water content of japonica rice is not less than 14.5%.

The quality of rice seeds is directly related to the growth and yield of rice planting, so the preservation of the seeds is very important. The above contents are the five main points of rice seed storage. I hope everyone can pay attention to these issues.

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