自1991年以来,秦皇岛山海关区示范推广了地膜土豆套种春玉米、下茬草莓,三年六茬的种植模式。其主要栽培技术要点是:首先种1.3米带田的地膜土豆。方法是春分前进行催芽处理,春分节进行播种,占地0.83米种两行,株距28.3厘米,亩株数3529株。播前重施底肥(亩圈肥3000公斤,三元素复合肥25公斤)。春玉米选用沈单7优良品种,5月5日行间套种,亩施三元素复合肥25公斤,单行双株,撮距 Since 1991, Qinhuangdao Shanhaiguan Demonstration Promotion of plastic film potato intercropping spring corn, straw under the next three years six cropping patterns. The main points of its cultivation techniques are: first of all, 1.3 meters of plastic film potatoes. The method is to conduct the germination treatment before the equinox, sowing in the spring sub-section, covering 0.83 meters of two rows, with a spacing of 28.3 cm and 3529 mu of trees. Before sowing heavy base fertilizer (acre circle 3000 kg, three-element compound fertilizer 25 kg). Spring corn selection Shen 7 good varieties, May 5 intercropping intercropping, Mushi three elemental compound fertilizer 25 kilograms, single double strains,