笔者在日本筑波国际农业培训中心学习蔬菜生产技术期间,不仅听了日本研究西瓜的专家讲课,而且参加了有关的实习和试验。从日本1981年的统计数字看,日本全国在露地和小拱型薄膜中种植西瓜24993公顷,其中嫁接西瓜为23812公顷,占总面积的95.3%,在温室种植西瓜3244公顷,其中嫁接西瓜为3213公顷,占99.0%。 During the study of vegetable production technology at Tsukuba International Agricultural Training Center in Japan, the author not only listened to the lectures of Japanese experts on watermelon, but also attended related internships and experiments. According to the statistics of Japan in 1981, in Japan, 24,993 hectares of watermelons were planted in open-field and small-arch films, of which 23,812 hectares were grafted watermelons, accounting for 95.3% of the total area; 3,244 hectares of watermelons were planted in the greenhouse, of which 3213 Hectare, accounting for 99.0%.