Efeito da cultura do nabo forrageiro na descompactação do solo

Abstract

Agricultural practices and the intensive use of heavy machinery cause changes in the physical structure of the soil, and problems related to soil compaction, due to degradation of physical quality, and negative effects on crop development. The compacted layer impairs rooting and water penetration into the soil. The use of forage species and legumes exceed the compacted layers, and decompress biologically causing less degradation. The objective of this work was to analyze the capacity of the forage turnip (Raphanus sativus L.) to promote soil decompression. The experiment was carried out under the shelter of the sun, in the municipality of Francisco Beltrão - Paraná. The soil, characterized as Dystroferric Red Nitosol, was collected at the Federal Technological University of Paraná, being withdrawn at depth of 0 to 20cm.The treatments were performed with 4 fertilization distributions: T1) Upper ring and lower ring both without fertilization; T2) Lower ring and upper ring both with fertilization; T3) Top ring with fertilization and lower ring without fertilization; T4) Top ring without fertilization and lower ring with fertilization, with 4 replicates, totaling 16 experimental units. The data were analyzed at the end of 105 days of experiment, being analyzed the vegetative parameters of green matter and dry matter production, as well as the soil density parameter, verifying the decomposing action of Forage Turnip. According to the statistical analysis, the values of density and production of aerial and root green mass were statistically different for treatment 1, which shows that soil fertilization has a significant influence on the decomposition of the by the Forage Turnip.