Tecnologia de aplicação para distribuição de bioinsumos no cafeeiro na região do cerrado mineiro

Abstract

The coffee culture is of great importance for the cerrado region of Minas Gerais. Many factors affect its productivity, such as the biennial, climate, irrigation, pruning, nutrition and fertilization. Thus, ways to remedy this problem are sought. Thus, this work was carried out with the objective of evaluating the effect of the application technology via drench and fertirrigation in the distribution of biostimulants, compared with conventional manure to complement the chemical fertilization in the coffee tree, aiming at the increase in productivity. The experimental area used is located in Araguari-MG, which has the Mundo Novo IAC 379-19 variety, planted at 3.80 m spacing between rows x 0.67 m between plants, with planting in December 2015, in which the experiment had 4 blocks and 8 treatments in DBC format in a factorial 2x3+2. The application was carried out using a solid input distributor to launch chicken litter, a hydraulic sprayer equipped with a spray drench system and the bioinput fertirrigation system. The commercial products applied were two biostimulants with functions of improving the chemical and biological conditions of the soil in which the soil conditioning biostimulant was used at a dose of 65 L ha-1 and the fluid rooting biostimulant was used at a dose of 5 L ha-1 both of which their dose was divided into two applications, as for the chicken manure a dose of was used 3 t. ha-1 and its application occurred only once. The effect of application technology was studied by analyzing the parameters length of plagiotropic branches with an average growth of 1 cm per month; number of nodes per plagiotropic branch with an average growth of 1 node per branch; number of fruits in rosettes per branch where perch was not diagnosed; index of soil organic matter that was maintained; productivity of 96.60 sc*ha-1 on average; crop health, through leaf miner incidence and brown eye spot severity without incidence diagnosis and grain sieve classification. Thus, conventional manure can be replaced by biostimulants, which are liquid organic matter. And the forms of application of biostimulants did not interfere with the main characteristics observed, so the form of application of biostimulants can be at the discretion of the property operator.