Influência de diferentes doses de fertilizante foliar nos atributos fitotécnicos da batata

Abstract

Brazil has shown a significant increase in the production of potatoes (Solanum tuberosum L.), due to climatic factors and advances in management techniques. In cultivation, it is important to always take into account the amounts of correctives and fertilizers to be applied, in order to allow the good growth and development of the plant. Thus, the objective of this work was to evaluate the effect of different doses of foliar fertilizer on the production and quality of potato cultivar Orchestra. The experiment was conducted from April 11 to July 12, 2022, in the experimental area of the Universidade Federal de Uberlândia, Monte Carmelo Campus. The experimental design was randomized blocks. The treatments were composed of four doses of foliar fertilizer (0 kg ha-1 ; 2.5 kg ha-1 ; 5 kg ha-1 and 7.5 kg ha-1 ), with six replications. Each experimental plot consisted of five meters in length with two planting rows, containing 25 plants each, spaced 0.20 m between plants and 0.8 m between rows. At harvest time, the following were evaluated: number of tubers per plant and fresh tuber mass of each class: floron, special, first, second, miscellaneous and discard. The data were submitted to analysis of variance using the F test at 5% of significance and, when there was a significant difference, regression analysis was performed. There was no significant difference at the level of 5% of significance between the foliar fertilizer doses for the Orchestra cultivar, for all the variables evaluated, except for the reducing sugar content. There was an increasing linear increase in the reducing sugar content with the increase in foliar fertilizer doses, and for each increase of 1 L ha-1 of foliar fertilizer, there was an increase of 0.005% of reducing sugar in potato tubers. Thus, it is concluded that the use of foliar fertilizer did not increase the yield of the potato cultivar Orchestra, under the conditions in which the experiment was conducted, but provided an increase in the reducing sugar content. However, it is important to pay attention to dosages, as very high doses can negatively interfere with this characteristic.