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北京地区,一般在10月以后到来年四月份以前的这段时期,是果菜的淡季。市场上供应的鲜果菜都要靠温室生产。八月下旬以后,由于露地麦茬西红柿尚未过关、量也很少。9～10月中旬这段时间,市场几乎没有鲜西红柿。根据西红柿长势强,生长期长,根系发达,抗病性强的特点,选用无限生长类型的品种,采驭大架双行带状密植的方式,在加强肥水管理的基础上,实行“二次换头”的整枝技术,使西红柿供应达到了春提前,秋拖后,青熟果贮藏起来,可陆续供应到新年。
Beijing area, generally after the period from October to April before the coming season, is the off-season fruit and vegetables. The market supply of fresh fruits and vegetables rely on greenhouse production. After late August, due to the open field of stubble tomatoes have not been clearance, the amount is small. From mid-September to mid-October, there were few fresh tomatoes in the market. According to the strong growth of tomatoes, long growing period, developed roots, disease resistance characteristics, the choice of unlimited growth types of varieties, mining Yu big two rows of densely packed way, on the basis of strengthening the management of fertilizer and water, the implementation of “second Change head ”pruning technology, so that the supply of tomatoes reached the spring ahead of schedule, after the fall of autumn, green ripe fruit stored up, one after another supply to the New Year.