黔油及低2号系1995年审定的早熟、高产、双低优质油菜品种，为了使该品种在生产上发挥其增产潜力，对该品种丰产、稳产性和产量三要素进行通径分析。分析表明：该品种丰产、稳产性好，单位面积上有效角来数是决定产量的主要因子。为了达到增角增粗增重之高产目的，提出“冬壮春发’”的技术措施。 Qianyou and Low 2 were premature, high yield and double low quality rape cultivars approved in 1995. In order to make this variety play its potential yield in production, the path analysis was conducted on the three elements of high yield, stable yield and yield of this variety. The analysis shows that this variety has high yield and good stability, and the number of effective angles per unit area is the main factor that determines the yield. In order to achieve the purpose of increasing production by increasing thickening and weight gain, the technical measures of “winter strong spring hair” are put forward.