Soybean yield under different density of populations and cations percentage (Ca, Mg and K) in base saturation

Ronaldo Tsuyoshi Watanabe, Roberto Antunes Fioretto, Inês Batista da Fonseca, Adilson Luiz Seifert, Débora Cristina Santiago, Jose Eduardo Creste, Arlindo Harada, Mauro Cucolotto

Abstract


A field experiment in Cambé-PR was carried out with 20 treatments arranged in split plot with 4 replications in a randomized complete block design, using the soybean cultivar BRS 133. The treatments were CALPOT (0.0 and 2.35 t.ha-1) in the main plots, source of phosphorus (STP and SSP) in sub-plot, dosages of phosphorus (40 and 60 kg of P2O5.ha-1) in the sub-sub-plots, and density of plants (9 and 18 plants m-1) in the sub-sub-sub-plots. The greatest effect was on plant population, with the highest dry matter accumulation for the density of 200.000 plants ha-1 (9 plants m-1). The basic cation equilibrium in the soil helped to maximize this effect.


Keywords


Base equilibrium; Liming; CALPOT; BRS133; Density of plants.



DOI: http://dx.doi.org/10.5433/1679-0359.2005v26n4p477

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional