Influence of reclaimed water on photosynthetic characteristic and chlorophyll content of the two greenbelt plants

In order to broaden the application range of reclaimed water in urban greenbelt, a pot experiment was conducted, reclaimed water was used in greenbelt irrigation test of white clover and alfalfa. The changes of photosynthetic characteristic and chlorophyll content under reclaimed water irrigation have been studied. The results showed that reclaimed water irrigation can improve photosynthetic indices in a certain period of time and to some extent. Later, reclaimed water for white clover irrigation, the photosynthetic rate (Pn), transpiration rate (Tr), conductance to H2O (Gs) and CO2 concentration (Ci) under the irrigation test is significantly higher than that under running water irrigation. Two plants species’ changes of Tr, Pn, intercellular Ci are closely related with Gs. There is no significant difference in photochemical efficiency (Fv/Fm) and chlorophyll content between running water and reclaimed water. In short, reclaimed water irrigation does not cause damage to white clover and alfalfa, and has a certain role in promotion.