光合作用是衡量果树生长发育状况的一项重要生理指标,光合强度的高低直接影响果树的生长和结果.为了探讨番石榴在不同光强下和不同叶龄的光合强度,1986年10月我们利用氧电极法测定了番石榴叶片的光合强度,以期找出叶片的光补偿点和光饱和点以及不同叶龄的光合强度,为生产实践提供依据. Photosynthesis is an important physiological index to measure the growth and development status of fruit trees, and the photosynthetic intensity directly affects the growth and the results of fruit trees.In order to investigate the photosynthetic intensity of guava under different light intensities and leaf ages, we used Oxygen electrode method was used to determine the photosynthetic intensity of guava leaves in order to find out the light compensation points and light saturation points of leaves and the photosynthetic intensity of different leaf ages and provide the basis for production practice.