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龙湾屯镇张中务村是北京市顺义区蔬菜生产专业村之一，有着悠久的蔬菜生产历史。经过近十年的摸索，通过合理安排茬口，形成规模化经营，蔬菜生产实现了“三高”目标，形成了一年三茬种植模式。其具体做法如下。一、保护地类保护地生产以黄瓜为主，其次是西葫芦、架豆，并安排?
Longwan Tunzhen Zhang Zhongcun is Shunyi District of Beijing vegetable production one of the professional village, has a long history of vegetable production. After nearly a decade of exploration, through the rational arrangement of crop rotation, the formation of large-scale operation, vegetable production to achieve the “three highs” goal, forming a crop pattern of three crops a year. The specific practices are as follows. First, the protected areas to protect the production of cucumber-based, followed by zucchini, beans, and arrangements?