Chapter 3 Multiply method 黄秉维: Yp=0.93×Q p: photosynthetically potential productivity(kg/ha) Q: solar radiation (cal/cm2) coefficient:0.93=0(1-β)(1-)(1-a)×b(1-c(1-d e/(1l-6)/(1-f a: percent of PAR, 479 B: transmission of solar radiation, 5% y: percent of solar radiation absorbed by non- photosynthecally organs, 10% 2021/2/22 Assessment of Climate/Change ImpactsChapter 3 2021/2/22 Assessment of Climate/Change Impacts 7 of 46 Multiply method 黄秉维： Yp ＝0.93×Q Yp: photosynthetically potential productivity (kg/ha) Q: solar radiation（cal/cm2） coefficient: 0.93=α(1－β)(1－γ)(1-a)×b(1－c)(1－d) ×e/(1-δ)/(1-f) α：percent of PAR, 47％ β: transmission of solar radiation, 5％ γ：percent of solar radiation absorbed by non￾photosynthecally organs, 10％