【摘要】 以6年生桃树品种‘丽江雪桃’为试材,比较了开心形和主干形两种树形雪桃的光合作用强度及果实品质的差异。结果表明:(1)在相同光照条件下,主干形树形净光合速率由上往下呈递减的趋势,开心形树形净光合速率由外到内逐渐减小,综合比较两种树形各冠层的平均净光合速率,得出开心形树形优于主干形树形;(2)两种树形果实的果形指数、可滴定酸之间无显著差异,同一树形不同冠层果实的单果质量、可溶性固形物、可溶性糖、还原糖、果糖、维C的含量存在一定的差异性,开心形树形的平均单果质量高于主干形树形,综合比较这些品质指标在两种树形果实中的差异可知,开心形树形的果实品质总体上比主干形树形好。因此,在雪桃生产上,采用开心形树形,可使整棵树的光照分布更均匀,从而有利于提高果实的品质和产量。更多还原

【Abstract】 Taking 6-year-old ’Lijiang Snow Peach’ trees as experimental material compared the photosynthesis and fruit quality in two kinds of peach tree shapes between open center and spindle. The results showed that(1) under the same illumination, the photosynthetic rate of spindle shape was decreased from up to down, and the photosynthetic rate of open center shape was increased from inside to outside. Comparing the two kinds of peach trees, the photosynthetic rate of open center shape was better than spindle shape.(2)The shape index and the contents of irritable acid of fruits between open center and spindle shapes did not show significant differences. In the different canopy of the same tree shapes, the contents of fruit weight, TSS, soluble sugars, reducing sugars, fructose and vitamin C had a little difference. The fruits weight of open center shape peach was higher than that of spindle peach. Compared the hole quality index of the two tree shapes, the fruit quality of open center tree shapes was better than that of spindle tree shapes as a whole. So in the production of snow peach, adopting the open center tree shapes can make the whole tree more uniform distribution of light, thus to improve fruit quality and yields.更多还原