Studies on Diurnal Photosynthetic Dynamics of Edible Amaranth and Its Correlation with Environmental Factors

In nature growing,the diurnal dynamics of photosynthetic rate(Pn) and transpiration rate(Tr) of edible amaranth,and environment factors,and analyzed correlation between photosynthetic rate or transpiration rate in leaves of edible amaranth and environment factors.The results showed that the curves of diurnal variation in Pn and Tr of edible amaranth leaves had one peaks,but there were differences in the time and the value of the peaks occurred in terms of Pn and Tr,the time of the peaks of Pn was at 12:00 o'clock,and peaks of Tr was at 14:00 o'clock.There were extremely remarkable positive correlation between Pn and PAR,Ta and Gs,and remarkable positive correlation between Pn and Ca,negative correlation between Pn and(RH)(P0.05),and extremely remarkable positive correlation between Tr and Ta,extremely remarkable negative correlation between Tr and RH,and remarkable positive correlation between Tr and PAR,Gs and Ca.