Abstract:Higher light-saturated photosynthetic rate was observed for the NO ˉ 3-N plants of Acacia auriculaeformis under elevated atmospheric NH 3 in comparison with that grown in control. As the irradiance intensity reached about 700μmol·m -2·s -1, the maximum rate of photosynthesis occurred in leaves of NH + 4-N and NH 4NO 3-N plants of A. auriculaeformis in the elevated NH 3, and higher than that of the plants grown in control. When irradiance intensity was higher than 700μmol·m -2·s -1, their...