Variabilidade espacial da atividade micorrizica e sua influência na disponibilidade de fósforo e na produtividade da cultura do milho (Zea mays)

Abstract

Variability of phosphorus maps is a problem found in the majority of cultivated areas in southern Brazil region. For better understanding of the variability of this element is the further study of the phosphor's relations with other factors in the soil is necessary. Because of this the objective of this study was to diagnose the variability of the phosphorus content in the soil and its relations with the percentage of mycorrhizal infection in maize roots (Zea mays), and account if these relations impact the productive potential of culture. The analysis of mycorrhizal infection and availability of phosphorus were collected at the time of full anthesis culture due to greater symbiosis between fungus and plant is at this time, productivity was assessed from manual harvesting. The grid size was 0.33 hectare at 24 sampling points. After the acquisition of the data was used descriptive statistics to analyze cos data and Pearson correlation was used to diagnose the reactions between the variables. It was found great similarity between phosphorus variability in soil and the variability of mycorrhizal infection consequently productivity of maize. Although deserves more study, there is possibility that indirectly estimate the variation of phosphorus maps with the percentage of mycorrhizal present funds. The mycorrhizal infection , along with the availability of phosphorus in the soil indirectly influence the productivity of maize (Zea mays)