Fig. 1From: Effects of different water management options and fertilizer supply on photosynthesis, fluorescence parameters and water use efficiency of Prunella vulgaris seedlingsDiurnal variations of environmental photosynthetically active radiation (PAR) and ambient CO2 concentration (Ca) (a); air temperature (Ta) and air relative humidity (RH) (b) from 09:00 to 19:00 on the measuring dayBack to article page