Spacing, population density and nitrogen fertilization in corn grown in an Oxisoil

Revista Ceres

Maria Do Carmo Lana¹  Leandro Rampim¹  Tatiane Ohland²  Fernando Fávero² 

[1] ,Universidade Estadual do Oeste do Paraná Centro de Ciências Agrárias Marechal Cândido Rondon Paraná ,Brasil

关键词: plant arrangement;    Zea mays L.;    urea;    topless nitrogen;    arranjo de plantas;    Zea mays L.;    ureia;    nitrogênio em cobertura;   

DOI  :  10.1590/S0034-737X2014000300018

来源: SciELO

【 摘 要 】

The objective of this study was to evaluate yield components, leaf nitrogen content and grain yield in corn as affected by row spacing, plant density and nitrogen topdressing. The experiment was conducted with the single-cross hybrid AG 8021, in the municipality of Toledo-PR, in an Oxisoil under no-tillage system, in the crop year 2005/ 2006. The experiment was arranged in a randomized block design and treatments in split-split-plots, with four replications. The two row spacings (0.45 and 0.90 m) were allocated in the main plots, the two plant densities (60,000 and 80,000 plants ha-1) were allocated in the subplots and the three nitrogen rates (80, 100, 120 and 140 kg ha-1 N) were allocated in the sub-subplots. Topdress nitrogen was applied using urea as N source. The rise of the plant population from 60,000 to 80,000 plants ha-1 and the application of topdress nitrogen resulted in increased production components. The application of topdress fertilization provided increase in leaf N content and grain yield for the spacings 0.45 m and 0.90 m. Yield was higher in the spacing 0.45 m than 0.90 m. Yield was higher with 60,000 plants than with 80,000 plants at 0.90 m, while at 0.45 m there was no difference in relation to the plant density.

【 授权许可】

CC BY   
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