photon flux density

基本解释

The total photosynthetic photon flux density above and below canopy has a significant diurnal and seasonal changes and the changes of the upper and lower canopy are consistent.
冠层上方和下方总的光合光量子通量密度具有明显的日变化和季节变化，并且冠层上下变化规律一致。
Diurnal change of net photosynthesis rate(NPR) in Xinjiang cotton fields with high yield had one peak value appearing at 14:00. NPR was positive correlation with photosynthetic photon flux density.
高产棉田净光合效率日变化有1个明显的峰值，出现在14：00，它与光合光量子通量密度呈线性正相关。