Sistema Aplique-Plante da Brachiaria em Função da Semeadura da Soja

Abstract

When it comes to how crops are managed for productivity, such as the use of straw and its desiccation good fertilization, and adequate plant population, all these parameters generate good productivity. Considering the possible interference of the herbicide glyphosate in the development of soybeans, this plant application test was carried out on different soybean sowing days, and this experiment was carried out in a 2 x 5 factorial scheme, with 4 replications. The treatments were brachiaria desiccated with glyphosate (presence: +straw and absence: -straw) and soybean sowing (1: sowing on the same day as brachiaria desiccation with glyphosate; 3: sowing on the third day of brachiaria desiccation with glyphosate; 6: sowing on the sixth day of brachiaria desiccation with glyphosate; 9: sowing on the ninth day of brachiaria desiccation with glyphosate and 12: sowing on the twelfth day of brachiaria desiccation with glyphosate) in pots with 13 dm3. With this, four plants of Urochloa ruziziensis cv. ruzizienses per pot, to form straw. In this sense, the following parameters were evaluated: dry mass of the root and shoot, number of leaflets, SPAD index, number of pods and productivity. The research concluded that sowing after desiccation did not affect the dry mass of the roots and shoots, number of leaflets, SPAD index, number of pods, and soybean productivity in the presence of brachiaria. Sowing in soil days after glyphosate desiccation without brachiaria affects soybean growth, development, and productivity.