Relationship between net photosynthetic rate and photosynthetic parameters for Juglans hopeiensis Hu 'Yihe 1'.

摘要

The net photosynthetic rate (P_N) and photosynthetic parameters of Juglans hopeiensis Hu were studied by an open gas analysis system (CI-301PS) in the orchard. The results are as follows: (1) the diurnal change of P_N in J. hopeiensis had a small significant positive correlation with leaf temperature (TL), stomatal conductance (g_s), photosynthetic available radiation (PAR), and transpiration rate (E), and had a negative correlation with intercellular CO₂ concentration (C_i). (2) The seasonal change of P_N in J. hopeiensis had a significant positive correlation with chlorophyll (Chl) content, and a strikingly negative correlation with intercellular CO₂ concentration. (3) The P_N values of J. hopeiensis Hu were lower than that of Juglans regia L. and similar to that of Juglans mandshurica Max.