Table grape production and quality as related to the use of agrotextile fabrics as new climate control cover and reflective groundcover
Discover the results of 2 year field trials in South-Italy, under the auspices of the University of Foggia and the University of Turin. The results were presented at the recent 8th International Table Grape Symposium in Italy.
Controlling vineyard microclimate and light environment are main goals to produce high quality grapes, since budbreak, shoot growth, bud fruitfulness and berry composition are all influenced. In vineyards with dense foliage, overhead training systems and plastic coverings, the quantity/quality of available solar radiation is crucial for thermal balance, photosynthetic rate, berry set, yield, juice composition and skin color.
The scientific trial aimed to investigate the effects of two recently developed agrotextile fabrics adopted, respectively, to control vineyard microclimate for early ripening and to improve light environment increasing the sunlight reflection.
Authors : L. de Palma, P. Limosani, G. Vox, E. Schettini, D. Antoniciello, F. Laporta, V. Brossé,, V. Novello
Read the full scientific abstract here.
The conclusion of the study pointed out the following significance and added-value of Coverlys and Lumilys for table grape production and quality :
"The agrotextile transparent fabric Coverlys® was found to provide a very high retention of long IR radiations that accounted for its thermal efficiency. Moreover, it was found to have great light diffussivity that is known to reduce the intra-canopy shade that lowers leaf photosynthetic efficiency, and to decrease the impact of solar energy on top foliage that makes possible sunburns. Finally, Coverlys® showed very high UV transmittance resulting in more skin phenols."
"The agrotextile white reflective groundcover Lumilys® showed a great potential for recovering ground reflecting light. In combination with Coverlys®, it gave a definitive contribution to the light environment under canopy. This improved grape yield, mainly by enhancing the large berries percentage and hence the bunch weight, skin color and total flavonoid accumulation. The soil protection with Lumilys® proved to lower soil temperature and water evaporation, allowing to keep the soil more moisturized."
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