SciELO - Scientific Electronic Library Online

vol.34 issue4Mobility of inorganic and organic phosphorus forms under different levels of phosphate and poultry litter fertilization in soilsGrowth and nutrition of eucalyptus clone as affected by the application of c-humic acid doses author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista Brasileira de Ciência do Solo

On-line version ISSN 1806-9657


SA, João Carlos de Moraes et al. Root growth, nutrient extraction and grain yield of corn genotypes under different amounts of black oat crop residues under no-tillage. Rev. Bras. Ciênc. Solo [online]. 2010, vol.34, n.4, pp.1207-1216. ISSN 1806-9657.

Crop residues on the soil surface act mainly as protection against raindrop impact, reducing aggregate disruption, runoff, sediment transport and consequently, erosion. This protection can have significant effects on the corn plant characteristics. The objective of this study was to evaluate the effect of the amount of black oat residues on no-tillage root development, nutrient uptake and grain yield of corn genotypes. The experiment was conducted in an Oxisol, in a randomized block design in split plots with three replications. The main plot was represented by the amount of black oat residues on the soil surface (0, no residues, 5.0 and 10.0 Mg ha-1) and sub-plots consisting of 13 maize genotypes. The amount of crop residues affected root length significantly, at the time of leaf burning. The interaction between crop residues x genotype affected the variables in this study significantly. The maize root system was stimulated by additional doses of black oat residues, both in the soil surface (0-20 cm) and the subsurface layer (50-100 cm). The increased amount of crop residue on the soil surface resulted in greater N, P and K uptake and did not affect the uptake of Ca, Mg and S by the corn plants.

Keywords : Zea mays; root system; crop residue.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License