Influência de fertilizantes contendo Cálcio, Nitrogênio e Enxofre em híbridos de milho transgênico

Abstract

With (Zea mays L.) achieve a high level in the current agricultural scenario, totaling 2.23 million hectares cultivated in the 2019 off-season in Paraná state. In order to obtain high production in the corn crop, it is necessary that the soil has adequate nutritional proportions and for this to be possible, the use of mineral fertilizers is essential. In addition to providing productivity gains to the crop, mineral nutrition can indirectly influence the crop's greater ability to tolerate various pests and diseases. Therefore, this paper has by main objective to analyze the influence of 4 calcium, nitrogen and sulfur-based fertilizers on the efficiency of the lepidopterans control in transgenic corn hybrids with Bt technology (Bacillus thuringiensis). The experiment was conducted in an area of 1,060m² in Randomized Block Design (RBD) with eight treatments and three replications. The genetic material used was H1 containing the proteins (Cry1A.105 + Cry 2A.2Ab2 + RR + Cry 1F + VIP 3Aa20) and H2 containing the proteins (VIP 3Aa20 + Cry 1ab + RR). The fertilizers studied were SC containing 31% Ca + 13.5% S and N24 containing 14.5% Ca + 7.5% S + 24% N and N45 containing 45% N. The characteristics evaluated were the attack severity of caterpillar in V6 crop stage, plant height, ear insertion height and productivity. The data were analyzed at the field level according to the crop development, after collecting them, statistical analysis (Scott-Knott) and (LSD) was performed. For efficiency in the control of lepidopterans, the H1 hybrid performed better when the N24 was not used, whereas the H2 reached its greatest efficiency when the same was used. in productivity, the H1 hybrid performed.