What Does APAR Stand For?

APAR stands for Absorbed Photosynthetically Active Radiation

APAR, or Absorbed Photosynthetically Active Radiation, refers to the portion of solar radiation in the photosynthetically active range (400-700 nm) that is absorbed by photosynthetic organisms, primarily plants. APAR is a critical measure in understanding biological productivity, as it directly influences the rate of photosynthesis and, consequently, plant growth and ecosystem functioning. It is essential for assessing energy transfer within plant canopies and the overall health of terrestrial ecosystems.