THE INFLUENCE OF DIFFERENT PLASTIC MATERIALS OVER LOW TUNNELS ON EARLINNES, PRODUCTIVITY AND SEVERAL QUALITY PARAMETERS IN STRAWBERRY CROP (FRAGARIA X ANANASSA DUCH) ON THE SPANISH MEDITERRANEAN COAST
In the first year of experiments TP (thermal polythene), PE (clear polythene) and EVA (ethylene vinyl acetate) were tried. The best results for earliness were produced by TP (P< 0.01), the improvements being 4 weeks ahead of the begining of commercial picking.
In the second year TP, PE, EVA and PVC (polyvinylchloride) were tried, and PVC produced the greatest improvement in earliness (P< 0.01), being between 4 and 6 weeks.
During the third year TP, EVA and PVC were tried and the best results for earliness were also produced by PVC with different values of significance, the improvements varying between 2 and 4 weeks.
Significant difference were not observed among the materials employed on either productivity on analyzed quality parameters.