关键词: 杂交水稻, 杂交水稻, 特优649, 产业化技术

Abstract: In order to get insight into the light distribution and light energy utilization of six types of tree shapes, the distribution of relative light radiation and its effects on photosynthetic rate, specific leaf weight and photosynthetic pigment content were detected and evaluated in different tree shapes of Fuji apple. Results showed that the relative light level and light energy utilization of high stem and open center shape as well as small and sparse canopy shape were better than others tested. Double canopy shape and spindle shape took second place, while big canopy shape and center shape had the lowest light distribution. Light distribution effected distinctly on specific leaf weight and chlorophl content in all tree shapes tested. In six tree shapes, the light distribution intensities of high stem and open center shape as well as small and sparse canopy were suitable for apple production。