黑龙江省大庆市地处北纬４６°～４７°３５′，年无霜期只有１３０天左右，冬季室外最低气温经常在－２５℃以下。利用冬季不加温的节能日光温室周年可生产四茬蔬菜，经济效益可观。一、春茬番茄（２月中旬～６月中下旬）１１月中旬在温室播种育苗，２月中旬定植，４月中旬上 Daqing City, Heilongjiang Province is located at latitude 46 ° ~ 47 ° 35 ’north latitude, and the frost-free period is only about 130 days. The minimum outdoor temperature in winter is often below -25 ° C. Use of winter energy-saving solar greenhouse can not produce the fourth crop of vegetables, considerable economic benefits. First, spring stubble tomato (mid-February to mid-late June) seed nursery in the greenhouse in mid-November planting in mid-February, mid-April