Fig. 8
From: Photosynthetic characteristics of cotton are enhanced by altering the timing of mulch film removal
Absorbed light dissipation of two cotton varieties (XLZ42 and XLZ45) at different days since flowering in various treatment groups: 1 and 10 days before the first irrigation (T1, T10, respectively) and 1 day before the second irrigation (E1) after seedling emergence, during 2016–2017. The control group (CK) had film mulching throughout the growth stages. D, portion of absorption light energy lost via the PS-II antenna pigment; P, actual photochemical quantum yield of PS-II; E, portion of absorption light energy which cannot enter the photochemical process and cannot be lost through the antenna pigment