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对‘国光’苹果两种树冠结构、光照特点、光合效率、干物质的生产与分配、果品的产量与品质进行了研究。探明双层形的光照状况明显优于圆头形,其光合强度、光合效率、各器官干物质积累的总量、果实干物质的积累量,平均每公顷产量比圆头形分别高25.45％、12.47％、15.31％、50.69％、19.18％,且果品质优,产量稳定。该研究结果经在河北省大面积推广应用,其增产、增收效果十分显著。
The canopy structure, light characteristics, photosynthetic efficiency, production and distribution of dry matter, yield and quality of fruit were studied. The results showed that the light condition of double decker was obviously better than that of round head. The photosynthetic rate, photosynthetic efficiency, total dry matter accumulation of all organs, fruit dry matter accumulation and yield per hectare were 25.45% , 12.47%, 15.31%, 50.69%, 19.18%, respectively, and the fruit quality is excellent and the yield is stable. The results of this research have been popularized and applied in a large area in Hebei Province, and the effect of increasing production and increasing income is very significant.