Uso de polímero hidroretentor na produtividade e qualidade da cenoura sob irrigação superficial e subsuperficial

Abstract

The consumption of vegetables have made a change in the food habits of the population, as they have high nutritional value, as well as vitamins and minerals. One of vegetables in consumer choice is the carrot, it brings numerous benefits for human nutrition, where his main usable part of the diet is the root, which provides essential amounts of nutrients. The objective of this study was to evaluate the productivity and quality of carrot subjected to hidroretentor polymer doses in the soil due to the disposal of gotejadoras hoses. The survey was developed in the experimental area of Irrigation and Drainage Faculty of Agricultural Sciences (FCA) of the Federal University of Grande Dourados (UFGD) in the municipality of Dourados-MS. The treatments consisted of two positions of installation of dripper hoses, surface and subsurface and six hidroretentor polymer doses (0, 10, 20, 30, 40, 50 g m-2). The experimental design was in blocks in split plot with five repetitions. At 100 days after sowing the crop has been harvested, and evaluated the following parameters: shoot height (cm), root diameter (mm), fresh weight of leaf and root (g), dry weight of leaves and root (g). And quality parameters: pH, firmness, soluble solids, titratable acidity, vitamin C. All the evaluated variables were subjected to analysis of variance by the F test to compare means the drip sources of variation, and hidroretentor polymer doses applied the regression model. It follows that the productivity significantly responded, and it showed better efficiency for surface dripping. As for the root length parameters, fresh weight, shoot height, the dose provided greater performance was 40 g m-2 using subsurface drip. For quality parameters, the dose that corresponded best was 30 g m-2 of hidroretentor polymer with the surface drip.