Efeito da compactação do solo no desenvolvimento de nabo forrageiro e sua ação como descompactador biológico

Abstract

Some of the soil management techniques, together with poorly managed management and the intensive use of agricultural machinery, promote changes in the physical structure of the soil, consequently the degradation of arable soils and negative effects on crop development. The use of forage and legume species of resistant root system, which can overcome compacted layers of soil, becomes an alternative and / or complement to the current techniques of soil preparation, causing less degradation. The objective of this work was to evaluate the influence of soil compaction on the development of oilseed radish Raphanus sativus as well as its biological decompression effect. The experiment was carried out in a greenhouse, in the municipal nursery of Francisco Beltrão Paraná. Was used the soil of the region, characterized as Purple Distrophic Latosol. The treatments were four compaction levels (soil density: 1.3, 1.5, 1.7, 2.0 g.cm-3), with four replications, in a 4x4 factorial scheme. The experiment lasted 66 days. The vegetative parameters analyzed were the green matter and dry matter production of the oilseed radish and, with respect to the soil, the analysis of the density after the experiment to verify if the turnip fo rage promoted a decomposing effect in the same. The results showed that there was no effect of compaction on the growth of oilseed radish and, in relation to the decomposing effect, showed that oilseed radish showed to be a promoter of soil decompression.