Effect of Light Intensity Field on Wheat Yield in Agriculture Ecosystems.

Abstract: This paper based on the measured of light intensity and wheat production within the shelterbelt, with surfer graphics software, correlation analysis and regression analysis of classical statistical methods to analyze relation between wheat yield and light intensity within agro-forestry system. The results showed that the order of average light intensity was: south>west>east>north of the shelterbelt. Wheat yields can be divided into four regions: greater than 810g/m2 for the high yield areas; between 740.51 and 809.35g/m2 for the level-producing areas; 600-740.51g/m2 were cut areas; less than 600g/m2 were serious cut areas. Judged by wheat yield divided regions above, wheat yield reduction was not serious, but relatively large distributed of area on the east side of shelterbelt; seriously cut areas mainly distribute in the north of shelterbelt; east and south of shelterbelt almost did not have serious cut areas; The size of correlation between light intensity and yield per unit area was north of shelterbelt (0.850)>south of shelterbelt (0.564)>west of shelterbelt (0.554)>east of shelterbelt (0.474). The relationship between light and yield in north of shelterbelt was consistent with Compound model, the south of shelterbelt is consistent with Exponential model; the scale of shading was: north of shelterbelt was about 0-0.7H, south of shelterbelt was about 0-0.3H, east of shelterbelt was about 0-0.3H, west of shelterbelt was about 0-0.5H. [Copyright &y& Elsevier]