Aplicação de polímero hidroretentor na cultura do rabanete irrigado via gotejamento superficial e subsuperficial

Abstract

This study aimed to evaluate the effect of hidroretentor polymer doses (hydrogel) on productivity and quality of irrigated radish, via surface and subsurface drip. The treatments consisted of two positions of installation of gotejadoras lines, surface and subsurface and six hidroretentor polymer doses (0, 20, 40, 60, 80 and 100 g.m2) in a Hapludox. The experiment was conducted in two crop cycles in the period from October to November 2013 and April-May 2014, in the area of Irrigation and Drainage, the Faculty of Agrarian Sciences (FCA) of the Federal University of Grande Dourados (UFGD) in Dourados-MS. The experimental design was a randomized block in split plot with five repetitions. At 33 days after sowing (DAS) harvest was performed and evaluated the productivity parameters: number of leaves (leaves.plant-1), root diameter (mm), length of shoot and root (cm) fresh weight of shoot and root (g), dry weight of shoot and root (g). And quality parameters: pH, and total soluble solids (° Brix) in the roots, firmness and acidity. All variables were subjected to analysis of variance by F test and applied to source of variation polymer doses hidroretentor comparison using regression model. It was found that the production of radish roots, was influenced by the position of drip hoses, and the irrigation surface drip was statistically superior to subsurface drip to the number of leaves and fresh root mass in the first cycle (October / November) and shoot length in the second growing season (April / May). With respect to hidroretentor polymer doses, it can be concluded that radish culture responded significantly doses in two cycles of cultivation.