A comparison of the photosynthetic physiological characteristics between two divergent Aneurolepidium chinense typesgrey green type and yellow green type was made. The diurnal changes of photosynthetic rate and evaporation rate were analyzed The response of photosynthetic rate to light radiation,air temperature,relative humidity,leaf temperature,and stomata diffusion resistance for the two Aneurolepidium chinense types in the same habitat were studied.The experimental results show that the phot...