In order to study the photo-physiological characteristics of old world bluestem(Bothriochloa ischaemum L.Keng.) from loess hilly-gully region under different water and nutrient supplies,the photosynthesis-light response curves(Pn-PAR)were determined under potted conditions with two water treatments(HW-80%FC and LW-40%FC)and three nutrient treatments(CK,P and NP).Results indicte that the photosynthesis-light response curves of old world bluestem was more appropriate to a non-rectangular hyperbolic model.NP t...
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