Produção de rabanete sob níveis de reposição de água no solo em ambiente protegido

Abstract

The lack or excess of water significantly affects the yield of the crops, which can increase the cost of production and reduce the yield of the crop. In this context, the objective was to evaluate the development of radish by means of levels of water replacement in the soil in a protected environment. The experiment was conducted at the Federal University of Mato Grosso, Rondonópolis campus. The statistical design was the completely randomized with five treatments and five replications, making twenty-five experimental plots. The radish (Raphanus Sativus), Crimson Giant cultivar was used as plant species. The treatments were constituted in 60%, 80%, 100%, 120% and 140% of field capacity. Irrigation was monitored through five tensiometers installed in the experimental units with 100% FC (reference treatment). The analysis of variance of the data was performed using levels of significance of 5% of probability by the test F and verified the significant difference was made the polynomial regression analysis to analyze the data. The analyzed variables were fresh weight of shoot, dry shoot weight, fresh tuber weight, tuber dry weight, plant height, tuber length, tuber width, number of leaves and Chlorophyll Index. The variables fresh weight of shoot and dry weight of shoot were not significant in the F test up to 5% of significance. For the variables: fresh tuber weight, tuber dry weight, plant height, tuber length and tuber width, the highest results are above the 120% FC soil replacement level. The highest number of leaves was obtained for the soil water replenishment level of 112.79% FC. The highest and lowest chlorophyll index was obtained in soil water replacements of 60% FC and 140% FC, respectively. Considering the quality indexes necessary to commercialize the radish, the level of soil water replacement of 100% FC is more adequate.