The quality of watermelon seed is the basis for achieving high yield, high quality and high efficiency. In order to ensure that melon farmers purchase good quality varieties of watermelons, the following aspects of watermelon seed parameters are provided for reference when purchasing: Purity purity refers to the percentage of seeds of the tested seeds that meet the characteristics of the varieties to all the tested seeds. In other words, the higher the percentage, the better the seed quality. A watermelon seed should have a purity of more than 99%, and secondary seed purity should not be less than 96%. Clarity to clarity refers to the percentage of weight of pure seeds divided by the weight of all tested seeds, except for inclusions. The first-class seed purity should be above 99%, and the secondary seed should have a purity above 96%. Thousand-grain weight Thousand-grain weight refers to the weight of a thousand watermelon seeds. The 1000-grain weight of different varieties is different, but the 1000-grain weight of seeds of the same variety is basically certain. Under the condition of standard water content, the 1000-grain weight of seeds reflects the fullness of seeds, and the seed quality with 1000-grain weight is better. Water content The seed moisture content has a greater impact on seed life and shelf life. The moisture content of stored seeds at room temperature should be kept below 12% to 14%. In other words, the lower the water content, the higher the seed quality. Germination rate Seed germination rate refers to the percentage of normal germinating seeds in the final period of germination test. Germination rate (%) = Total number of germinated seeds per 100% of the number of test seeds per day. The germination rate is one of the basis for determining the size of the sowing. The germination rate of primary seeds should not be lower than 95%, and the secondary seed germination rate should be above 80%.
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