提出了农果复合系统内果树在单行种植条件下的影长ｌ０，农田遮荫率ρ和光合有效辐射相对日总量ε的计算方法；并根据果树透光率的观测结果，计算并绘出了果树在不同行向下ｌ０、ρ、ε的季节变化和空间分布图象 Proposed a method for calculating the shade length l0, the shade ratio ρ and the relative daily total ε of the photosynthetically active radiation of the fruit-fruit compound system under the condition of single-line planting. According to the observation results of the light transmittance of the fruit tree, the calculation and plotting The fruit trees in different rows downward l0, ρ, ε seasonal changes and spatial distribution of images