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INFLUÊNCIA DA COMPACTAÇÃO DO SOLO NO CRESCIMENTO DE MILHO (ZEA MAYSL.) EM LATOSSOLO VERMELHO-AMARELO

2018; University of Western Sao Paulo, UNOESTE; Volume: 14; Issue: 4 Linguagem: Inglês

10.5747/ca.2018.v14.n4.a252

1809-8215

Kalline Almeida Alves Carneiro, Flávio Pereira de Oliveira, Maria Cristina Santos Pereira de Araújo, Leandro Firmino Fernandes, Ewerton Gonçalves de Abrantes, Jhony Vendruscolo,

Agricultural and Food Sciences

Soil compaction is a limiting factor to growth and vegetative development, reducing agricultural productivity. In this context, the aim of the present study was to evaluate the effects of the depth of the compacted layer and the level of compaction of a Dystrophic Red-Yellow Oxisolon the growth of maize seedlings. The experimental design was completely randomized in split plots in time, arranged in a factorial 2 ×2 + 1, being two soil densities (1.5 and 1.7 g cm-3), two layers of compacted layer (0 -3 cm and 8 -11 cm) and a control with natural soil density (1.3 g cm-3), with three replications. Hybrid maize AG 1051 were cultivated in columns, over the period of 31 days. During the trial period, were evaluated: the leaf area (LA), the number of leaves (NL), stem diameter (SD), stem length (SL), root volume (RV), leaves dry matter (LDM), stem (SDM) and root (RDM), the absolute growth rate (AGR) and relative (RGR). According to the results, the increase in soil density promoted morphological changes in stem diameter, and the volume of the root, and consequently, the root dry mass and total dry matter. The compression in the surface layer is more harmful to crop growth than in the subsurface layer.