复种能显著提高土地和光能的利用率,是实现蔬菜高产、种类多样、周年均衡供应的一个有效途径。西北海拔2 500m以下的高寒地区,日照充足,5—10月为783~820h,日照百分率为69%。但由于温度低,热量不足,大于10℃的天数在200d左右,蔬菜勉强能一年两熟。现通过多年的种植试验和技术合成,总结出了由菠菜-西兰花(套秋白菜)3种蔬菜进行间套种的一年三熟 Multiple cropping can significantly increase the utilization of land and light energy, which is an effective way to realize high yield, variety and annual balanced supply of vegetables. Northwest elevation 2 500m below the alpine region, adequate sunshine, May-October for 783 ~ 820h, sunshine percentage was 69%. However, due to low temperature, lack of heat, the number of days greater than 10 ℃ in about 200d, vegetables barely able to two crops a year. Now through years of planting experiments and technical synthesis, summed up by the spinach - broccoli (sets of autumn cabbage) three kinds of vegetables between the intercropping of three sets of a year