Equations for estimation of solar UV, PAR and IV in polyethylene greenhouse

Abstract

In this work are shown annual and monthly evolutions of (H) over bar (IN)(G), (H) over bar (IN)(UV), (H) over bar (IN)(PAR), (H) over bar (IN)(IV) solar radiations and (K) over bar (UV), (K) over bar (PAR) e (K) over bar (IV) ratios inside a polyethylene greenhouse. The measurements were performed from March 2008 to February 2009 in Botucatu/SP/Brazil. Was presented either the annual linear relations (type Y = a* X) of daily irradiations ultraviolet ((H) over bar (IN)(UV)), photosynthetically active radiation ((H) over bar (IN)(PAR)) and near infrared ((H) over bar (IN)(IV)) with both global inside (H-G(IN)) and outside (H-G(EX)) irradiations and its respective coefficients of determination.