The first is the adaptability of cultivation. The adaptability of different ecotypes in different cultivation areas varies. Some varieties have wide adaptability and can be planted almost anywhere in the country. Other varieties have very narrow adaptability and can only be limited to a specific Planting area. In general, the North China ecotype and the East Asia ecotype can be selected, but the ecotypes in the northwest should not be used. At present, hybrid generations that are popularized and applied are mostly hybrids of various ecotypes. When selecting such a variety, the following three points must be taken care of: First, it must be tested before it can be used after approval, and it must not be introduced blindly. Second, the hybrid must have a parent that is suitable for the local ecological type; Local or ecological breeding areas. The second is the marketability of the market. In order to sell the produced watermelon in time and obtain better economic benefits, it is very important to grasp the market information and the marketability of the variety. Marketable varieties should be selected according to the different needs of the market. First of all, due to the different consumption habits of the size, skin color, tarnish, and tannins of the commodity melons in different places, we must select the right variety. Secondly, suitable varieties should be selected according to the market's distance. Local sales should select high-quality, high-sugar, thin-leaf varieties, such as Jingxin No.1, early good, etc.; the need for long-distance transport of exported goods, should choose the type of fruit Large, dense and hard quality, strong resistance to the species, such as Harvest 2nd. In large cities and economically developed regions, priority should be given to the selection of high-quality fruit-type varieties and a small number of special-purpose varieties, such as small fruit-type varieties, special-yellow-jaundice varieties, and yellow-leaf gift varieties. The third is because of the need to choose melon seeds. In addition to taking into account the above-mentioned cultivation suitability, consideration should also be given to different cultivation purposes, uses, and different cultivation methods. For example, early maturing should use early maturing and more productive varieties; winter and spring protected cultivation should use special varieties resistant to low temperature and weak light; autumn greenhouse cultivation should use high temperature resistant varieties; open cultivation should use larger fruit types. The middle and late-maturing Fengfeng product species; summer and autumn cultivation should be selected large late-maturing heat-resistant varieties. The fourth is a reasonable layout. In the development of watermelon production, reasonable combinations of early, middle and late-maturing varieties and other varieties should also be considered. While considering the realization of the diversification of commercial commodities, a few main varieties should be selected through comparison. The fifth is to choose high-quality high-grade varieties. In the suburbs of large cities, economically developed areas and tourist spots near the tourist spots should be selected high quality varieties.
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