DINÂMICA POPULACIONAL DE FITONEMATOIDES EM SISTEMA INTEGRADO DE PRODUÇÃO DE MILHO

Abstract

In Brazil, it has been consolidating its Integrated Agricultural Production Systems, both in search of more sustainable alternatives of grain production and in the degraded areas recovery. However, they have little information about some pests, diseases and nematodes dynamics soil systems, which can lead to productivity losses. This work aimed to verify the appropriate adjustments during the integrated production system implementation as well as to compare this area in relation to the native Cerrado area and other degrading pasture area. The experiment was carried out in Iporá - GO, evaluating three treatments (corn planting times) during 14 months of evaluation. Zea mays cv. BR 1051, Panicum maximum cv. Tamani (Tamani) and Cajanus cajan cv. Super N (guandu) were seeded simultaneously. The population and dry matter production of the three components were measured. Weather data were also collected. The treatments were analyzed by mixed models and the comparison with other areas was performed by analysis of variance. When any effect was identified, Tukey test was applied for means comparison. To assess the relationship between the variables, correlation, regression and principal component (PCA) analyzes were performed. It was verified that the population increase of Pratylenchus and Criconemella Plant-parasitic nematodes are related to the year time and soil moisture, 4 highlighting the maximum temperature. No significant correlation and regression were observed between grain yield and plant-parasitic nematodes population. Plant-parasitic nematodes affected the dry matter production of others consortium components (guandu and tamani). The plant-parasitic nematodes population did not differ between the area in which the SIPA was implanted in relation to the degrading pasture area and native forest (Cerrado). The SIPA implantation did not affect the population of plant-parasitic nematodes and they did not affect the corn production.