Influence of multilayer photoselective polymeric films on technical crops

In recent decades, the climate has undergone dramatic changes that have led to global ecological damage. Therefore, it was necessary to practice agriculture to provide biological protection of plants and soil. Currently, due to its advantages "plasticulture" gained a special scale. Covering greenhouses with polymeric films, protects crops against rain, extreme temperatures and pests. Using polymeric films modified by including additives for selective transmission of sunlight results in the control of heat and light energy, having a great influence on crop productivity and precocity. The amount of solar radiation and modifying the visible spectrum of solar radiation influences vegetative mass. Harvest and its biological requirements are basic conditions for systems of crop land covering, which should provide an internal environment conducive to plant growth compared to the natural environment outside. These films can be defined as "photoselective" if the incorporation of specific additives, are able to transmit selectively the sunlight in UV-VIS and IR.