Abstract:

Abstract: The fruit chroma values have been accurately measured through this research. The research on the fruit chroma of the apples grown by disperasal stratified system, open center system and other systems showed that the dominant wavelength of apples reconstructed by open center system is closer to red and lager saturation than that of apples by disperasal stratified system. In chromaticity coordinate system (L * a * b *), the a* of apples reconstructed by open center system was more than that of apples by disperasal stratified system while the b* of open center system was less. Anyhow, open center system is not conducive to increasing the apples’ brightness. The fruit chroma in the middle canopy is better than the upper and lower parts of the canopy, which may be caused by different radiation. It also has been discovered that the fruit chroma after 3-year-reconstruction of open center system is better than that of 1-year-reconstruction of open center system. The analysis demonstrated that relative radiation from 40% to 80% is the appropriate range for the fruit chroma.