How to identify watermelon seed quality
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The quality of watermelon seed is the basis for achieving high yield, high quality and high efficiency. In order to ensure that the melon farmers purchase good quality watermelon varieties, the following aspects are provided for the purchase of watermelon seed parameters: purity. Purity refers to the percentage of seeds in the tested seed that meet the characteristics of the variety. In other words, the higher the percentage, the better the seed quality. The purity of a watermelon seed should be more than 99%, and the secondary seed purity should be no less than 96%. 2. Cleaness. Clarity refers to the percentage of weight of pure seeds divided by the weight of all tested seeds, except for inclusions. The first grade seed purity should be above 99%, and the secondary species cleanliness should reach above 96%. 3. Thousand grain weight. Thousand-grain weight refers to the weight of one thousand grains of melon 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. 4. Water content. Seed moisture content has a greater impact on seed life and shelf life. The moisture content of seeds stored at room temperature should be kept below 12-14%. In other words, the lower the water content, the higher the seed quality. 5. Germination rate. Seed germination rate refers to the percentage of normal germinating seeds in the final period of the germination test. Germination rate (%) = Total number of germinated seeds per 100 days/Number of test seeds 100 The germination rate is one of the criteria for determining the size of seeding. The germination rate of primary seeds is not less than 95%, and the secondary seed germination rate should be above 80%.