Rivera Zayas, Johanie

Profile Picture

Filters

20151
Reset filters

Settings

Citations

Publication Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Publication
    Manejo de fertilizante nitrogenado para la optimización del rendimiento de una línea pura de maíz (𝘡𝘦𝘢 𝘮𝘢𝘺𝘴 𝘓.)
    (2015) Rivera Zayas, Johanie; Sotomayor Ramírez, David; College of Agricultural Sciences; Beaver, James S.; Román Paoli, Elvin; Department of Agro-Environmental Sciences; Cafaro, Matías J.
    Nitrogen (N) is one of the most important nutrients needed to maximize inbred maize (𝘡𝘦𝘢 𝘮𝘢𝘺𝘴 𝘓.) yield. An integrated management of the different contributing N sources to the agroecosystem can help improve N use efficiency. This study evaluated the effect of six fertilizer N levels (0, 34, 68, 102, 135 and 203 kg N ha⁻¹) and of a maize-fallow and maize-cowpea (𝘝𝘪𝘨𝘯𝘢 𝘶𝘯𝘨𝘶𝘪𝘤𝘶𝘭𝘢𝘵𝘢) rotation on inbred maize seed yield. The experiment was performed in a Jacaguas soil series (𝘓𝘰𝘢𝘮𝘺-𝘴𝘬𝘦𝘭𝘦𝘵𝘢𝘭, 𝘮𝘪𝘹𝘦𝘥, 𝘴𝘶𝘱𝘦𝘳𝘢𝘤𝘵𝘪𝘷𝘦, 𝘪𝘴𝘰𝘩𝘺𝘱𝘦𝘳𝘵𝘩𝘦𝘳𝘮𝘪𝘤 𝘍𝘭𝘶𝘷𝘦𝘯𝘵𝘪𝘤 𝘏𝘢𝘱𝘭𝘶𝘴𝘵𝘰𝘭𝘭𝘴) in the DowAgrosciences® experimental farm in Santa Isabel, Puerto Rico during the 2013-2014 winter season. Crop development was evaluated using plant height and flag leaf area as indicators. The parameters GreenSeeker®, SPAD-502® and N concentration in the indicator leaf were evaluated as indicators of N sufficiency. The cropping rotation maize-fallow and maize-cowpea did not affect seed yield performance (p>0.05). The fertilizer N level influenced seed yield (p<0.05) with an optimum fertilizer N level of 68 kg N ha⁻¹ for a seed yield of 2,918 kg ha⁻¹. The agronomic measurements of plant height, SPAD-502®, GreenSeeker® and N concentration in leaf tissue were adequate indicators of crop N sufficiency during the vegetative stages V6 to V12. In this study, the inbred maize line D065125VH requires 68 kg N ha⁻¹ to produce an optimum seed yield of 2,918 kg ha⁻¹ either with a rotation with cowpea or a fallow-maize cropping system.