大棚二茬西瓜、西红柿、芹菜高效栽培技术山东省安丘市利用日光冬暖大棚种植西瓜留二茬，轮作西红柿、芹菜，亩收入达到了１１２５４．５５元。其中西瓜第一茬在５月１５日开园收获，上市早，效益高，亩产量３０００公斤，每公斤价高达３．２元，最低１．２元，亩收入３７... Greenhouse two crop watermelon, tomatoes, celery efficient cultivation techniques Anqiu City, Shandong Province, the use of daylight winter warm shed planting watermelon leaves the second crop rotation of tomatoes, celery, mu income reached 11,254.55 yuan. Which the first crop of watermelon in the May 15 opening of the park harvest, the market early, high efficiency, yield 3000 kg, per kilogram price up to 3.2 yuan, the lowest 1.2 yuan, mu income 37 ...