为提高土地利用率 ,增加农民收入 ,近年来新乐市农技推广中心通过试验示范 ,摸索出地膜西瓜、白菜、菠菜一年三种三收种植模式 ,一般６６７ 可获纯效益５０００元以上。其主要栽培技术是 :一、茬口安排西瓜采用地膜覆盖栽培 ,３月下旬播种育苗 ,４月下旬定植 ,７月上中旬上市 ; In order to increase land utilization and increase farmers’ income, in recent years, Xinle City Agricultural Technology Extension Center has explored three kinds of three-cropping planting modes of watermelon, cabbage and spinach for one year through experiments and demonstrations. Generally 667 can achieve a net benefit of over 5,000 yuan. The main cultivation techniques are: First, stubble arrangement watermelon mulching cultivation, sowing seedlings in late March, planted in late April, listed on the mid-July;