What is PAR?

2019-05-21 04:10:37

PAR stands for photosynthetic active radiation, the part of the spectrum of energy that leaves chlorophyll molecules in an excited state when green plants absorb solar radiation during photosynthesis.The wavelength is about 400-700 nm, represented by the symbol Qp, and the unit is watt/meter 2. Photosynthetically active radiation is an energy source for plant life activities, organic matter synthesis, and yield formation.