Effect of two conditions of soil humidity after harvest in development of grape vine cv. Sultanina.

Alfonso Osorio U.1, Asdrúbal Rodríguez V., Rubén Alfaro P.

The effect of a complete drought after harvest was compared with irrigation when the 50% ofuseful humidity was reached on grape vine cv. Thompson seedless at Vicuña Research Station (300 7' South Lat.; 700 44' West Long.; altitude: 750 mover sea level) which belongs to the National Agricultural Research Institute. The experiment was established on a vine planted in 1978 with plantation distances of3.5 and 3 m and was arranged as a completely randomized block design with three replications. Each replication included 165 plants arranged in 5 rows with 33 plants and a totallength of 100 meters. The following parameters were assessed: soil humidity, budding and bud growth, berry size and weight, soluble solids, production and pruning. No statistically significant differences were found between the treatments although an earlier budding was observed in the drought treatment, but had no effect on the ultimate production.

Keywords: Grape vine, irrigation after harvest, stress.
1 Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación Intihuasi, Apartado Postal 36-B, La Serena, Chile. aosorio@inia.cl.