Row spacing, landscape position, and maize grain yield

The use of narrow row spacing for the different landscape positions of a field could punish maize [Zea mays L.] grain yield. Two experiments were conducted [2006/07 and 2007/08] at different landscape positions in the Inland Pampas of Argentina. Hybrid DK190MG was grown at the commonest plant densit...

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Autor principal: Maddonni, Gustavo Angel
Otros Autores: Martínez Bercovich, Joaquín
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Lenguaje:Español
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Acceso en línea:http://ri.agro.uba.ar/files/download/articulo/2014maddonni.pdf
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520 |a The use of narrow row spacing for the different landscape positions of a field could punish maize [Zea mays L.] grain yield. Two experiments were conducted [2006/07 and 2007/08] at different landscape positions in the Inland Pampas of Argentina. Hybrid DK190MG was grown at the commonest plant density used at each landscape position [approximately 5.1 plants/m2 at the summit, 6.5 plants/m2 at shoulder-slope position, and 7.6 plants/m2 at foot-slope position] with three row spacings [0.38 m, 0.52 m, and 0.38 m in a 2 x 1 skip-row pattern]. At the silking stage of maize crops, soil water content [0-200 cm depth] and maximum light capture differed [0.05 less than P less than 0.001] among landscape positions but were similar among row spacings. Differences in grain yield among landscape positions [mean 806, 893, and 1104 g/m2 at the summit, shoulder-slope position, and foot-slope position, resp.] were related to kernel number/m2 [r = 0.94], which was closely related [r = 0.90] to light capture around silking. Grain yield reductions [6 to 20 percent] were recorded when crops were cultivated in rows 0.38 m apart. The skip-row pattern did not improve grain yield. Maize grain yield was optimized in rows 0.52 m apart along the sandy landscape positions of the fields. 
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900 |a Maddonni, G.A. Cátedra de Cerealicultura, Departamento de Producción Vegetal, Facultad de Agronomía, Universidad de Buenos Aires, Avenue San Martín 4453Buenos Aires, Argentina 
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900 |a The use of narrow row spacing for the different landscape positions of a field could punish maize [Zea mays L.] grain yield. Two experiments were conducted [2006/07 and 2007/08] at different landscape positions in the Inland Pampas of Argentina. Hybrid DK190MG was grown at the commonest plant density used at each landscape position [approximately 5.1 plants/m2 at the summit, 6.5 plants/m2 at shoulder-slope position, and 7.6 plants/m2 at foot-slope position] with three row spacings [0.38 m, 0.52 m, and 0.38 m in a 2 x 1 skip-row pattern]. At the silking stage of maize crops, soil water content [0-200 cm depth] and maximum light capture differed [0.05 less than P less than 0.001] among landscape positions but were similar among row spacings. Differences in grain yield among landscape positions [mean 806, 893, and 1104 g/m2 at the summit, shoulder-slope position, and foot-slope position, resp.] were related to kernel number/m2 [r = 0.94], which was closely related [r = 0.90] to light capture around silking. Grain yield reductions [6 to 20 percent] were recorded when crops were cultivated in rows 0.38 m apart. The skip-row pattern did not improve grain yield. Maize grain yield was optimized in rows 0.52 m apart along the sandy landscape positions of the fields. 
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