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对刺梨的5个重要品种:贵农1号、贵农2号、贵农5号、贵农6号和贵农7号的营养枝和结果枝叶片的光合速率、光补偿点和光饱和点进行了测定。结果表明,叶片光合速率(Pn)由强到弱的顺序为:贵农6号>贵农7号>贵农2号>贵农1号>贵农5号;坐果情况会对光合速率产生重要影响,结果枝叶片的Pn高于营养枝叶片的Pn。各品种光补偿点由低到高为贵农2号<贵农7号<贵农1号<贵农5号<贵农6号;光饱和点由高到低为贵农7号、贵农2号>贵农1号、贵农5号>贵农6号,较低的光补偿点、较高的光饱和点是刺梨品种丰产的一般特点。
The five important varieties of Rosa roxburghii: the photosynthetic rate, light compensation point and light saturation point of vegetative shoots and shoots of Guinong 1, Guinong 2, Guinong 5, Guinong 6 and Guinong 7 The measurement was carried out. The results showed that the order of leaf photosynthetic rate (Pn) from strong to weak was: Guinong 6> Guinong 7> Guinong 2> Guinong 1> Guinong 5; the situation of fruit setting would have an important effect on photosynthetic rate As a result, Pn in shoots was higher than Pn in vegetative shoots. The light compensation points of all cultivars were Guinong 2 Guinong 1, Guinong 5> Guinong 6, the lower light compensation point, the higher light saturation point is the general characteristics of the high yield varieties of Rosa roxburghii.