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 seeds:
1, purity. Purity refers to the percentage of seeds of the test seed that meet the shape characteristics of the species to all the tested seeds. 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, the degree of clarity. 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%.
3, a thousand grain weight. Thousand-grain weight refers to the weight of 1000 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.
4, water content. Seed moisture content has a greater impact on seed life and shelf life. The moisture content of stored seeds at room temperature should be maintained at 12% to 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. The germination rate is one of the basis for determining the size of the sowing. The germination rate of primary seeds is not less than 95%, and the secondary seed germination rate should be above 80%.
Oseltamivir Phosphate (Oseltamivir phosphate) is often referred to as "Tamiflu" (Tamiflu). Produced and sold by the Roche Group, launched in Switzerland in 1999, and launched in China in 2001. It is the most commonly used and one of the most effective drugs against avian influenza, H1N1 influenza virus and influenza B virus. Reducing the incidence of influenza complications can also reduce the use of other medicines, and Tamiflu can increase the survival rate of influenza patients by about 37%.
But it also has large side effects, especially for children. And its price is more expensive to take twice a day, 75mg each time, the retail price of medicines is equivalent to 60 yuan per day, and a course of 5 days is equivalent to about 300 yuan. In addition, taking Tamiflu before the flu has no preventive effect on flu.
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