Germinação, desenvolvimento e produção da cenoura (Daucus carota L.) em função de níveis de irrigação na microrregião do cariri ocidental paraibano.

Abstract

The work was conducted from September 1998 throughout February 1999 at the County of Sumé , State of Paraíba , Brazil. The objective was study the effect of five irrigation leveis (20, 40, 60, 80 and 100% of the class A evaporation pan) on the germination, development and production or carrot. The work was divided in two phases. The phase I studied the effect of the water treatments on the germination of two carrot cultivars (Tropical and Brasília) and the phase I I studied the effect of the same treatments on the development and production of the cultivar that had the best germination in the Phase I , the tropical. The 100 and 80% evaporation pan treatments gave the higher germinations and the 20% one, the lowest. No significant effect was found for cultivar, and irrigation x cultivar interaction. - Irrigation leveis affected significantly plant heigth and plant production ( wet and dry weigth of the aerial part, commercial and total weigth ). - Carrots roots were classified with respect to its tuber diameter and the water production function was determined. In general, the best treatments were those irrigated with 100 and 80% of the Class A evaporation pan . The optimum consumptive use for the carrot was between 800 and 1000 mm of water.