SciELO - Scientific Electronic Library Online

vol.33 issue4The germination of bush mint (Hyptis marrubioides EPL.) seeds as a function of harvest stage, light, temperature and duration of storagePrediction of soil chemical attributes using optical remote sensing author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Acta Scientiarum. Agronomy

On-line version ISSN 1807-8621


SA, João Carlos de Moraes et al. Extraction of nutrients and yield of corn genotypes affected by levels of straw. Acta Sci., Agron. (Online) [online]. 2011, vol.33, n.4, pp.715-722. ISSN 1807-8621.

In a clayey Red Latosol, located in Ponta Grossa - PR, the nutrient uptake and yield of corn genotypes was evaluated, affected by levels of black oat crop residues in no-tillage. The experimental design was a randomized block design arranged in split-plot with three replications. The plot consisted of three levels of black oat crop residues maintained on the soil surface (without straw, 5.0 and 10.0 ton. ha-1), and the sub-plots comprised of 13 corn genotypes. The order of the gain on the total uptake of nutrients compared to 5.0 and 10.0 ton. ha-1 straw was K> P> N, with values of 30.4 and 47.1, 17.6 and 26.4, and 5.4 and 11.3%, respectively. The genotypes differed significantly for nutrient uptake and grain yield, due to the added amounts of black oat crop residue on soil surface in no-tillage system in the initial phase. The increase of crop residue amount on the soil surface did not affect the mean yield of the experiment. The increase in the amount of crop residue on the soil surface resulted in greater total uptake of N, P and K, but did not affect the total uptake of Ca, Mg and S by corn plants. The order in nutrient uptake by the genotypes because affected by crop residue addition was: K> P> N> S> Ca = Mg.

Keywords : soil cover; Zea mays; no-tillage.

        · 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