Atenuação e densidade do fluxo de radiação solar no desenvolvimento da alface.

Abstract

With the objective of analyzing the effect of the attenuation of the solar radiation flux in the development and growth of the lettuce, the experiment was carried out in 5 flowerbeds measuring 10,0 mx1,15m, irrigated by dripping, which was analyzed dry and fresh mass, number of leaves, width and height, within the microclimatic changes caused by using black screen of polyethylene with different levels of shading( 0%, 18%, 30%, 50%, 70%). It was carried or a research at the Experimental Area of Hydrical Resources and Environmental sanitation that belongs to West Paraná State University- UNIOESTE Campus Cascavel- PR.