Ecofisiologia de coqueiro anão verde sob turnos de rega e cobertura de solo.

Abstract

The availability of water is one of the most limiting factors to cropping systems in cultivated crops in the Northeastern semi-arid region, compromising the development and yield of the plants, such as coconut, of great national and regional importance, mainly in public irrigation perimeters, making proper water management necessary. The aim of this study was to study the ecophysiology of irrigated green dwarf coconut under different irrigation shifts and soil cover, in order to identify the most appropriate irrigation management for the cultivation conditions of this crop in the Brazilian Northeastern Semi-arid. The work realized in the irrigated perimeter Varzeas de Sousa, Sector I, Lot 14, in the city of Aparecida/PB. It was using an experimental design in randomized blocks, studying the combination of five irrigation shifts and two soil cover conditions, applied in green dwarf coconut trees repeated in five blocks, with coconuts of 7 years of age implanted in the spacing of 7 m between rows and 7 m between plants. The experimental unit is composed of one useful plant. Growth, gas exchange and plant production were evaluated in the one-year cycle. The data had submitted to analysis of variance; test F, with test of comparison of means for the factor of irrigation in each soil cover, using the Sisvar 4.0 program. In the period and in the conditions through which the experiment conducted the soil cover allows irrigation of the green dwarf coconut every five days without adversely affecting the physiological, growth and production variables.