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dc.contributor.advisorde la Torre, Winston
dc.contributor.authorTorres-Justiniano, Salvio
dc.description.abstractThis experiment quantified the agronomical and physiological response of environmental cane US 67-22-2 to N fertilization levels, and developed mathematical relationships between dependent traits and independent climatological parameters. A preliminary greenhouse experiment, was the foundation for the design of a field experiment conducted on a Vertisol soil at Puerto Rico, in which the sugarcane response to four N levels (0, 448, 896, 1344 Kg N/ha) and three harvest intervals (HI) (240, 270, 300 days after planting) was studied. At the greenhouse experiment and in terms of leaf area, plant height and number of leaves, the plants with N were significantly superior to the control, and statistically similar among them. At the field experiment it was observed that the application of 448 Kg N/ha is enough to obtain adequate plant cane yield, photosynthetic rate and relative chlorophyll content. The optimum dry matter yield (25,811 Kg/ha) was obtained at 300 days HI.en_US
dc.description.abstractEste experimento midió la respuesta de la variedad de caña US 67-22-2 a niveles de N y desarrollo relaciones matemáticas entre variables dependientes y parámetros climatológicos independientes. Un estudio preliminar de invernadero sirvió como base para el experimento de campo realizado en un suelo Vertisol, en el cual se estudio la respuesta de la caña a cuatro niveles de N (0, 448, 896, 1344 Kg/ha) y tres intervalos de cosechas (IC) (240, 270, 300 días). En el invernadero y en términos de área foliar, altura de planta y número de hojas. Las plantas con N resultaron significativamente superior al control y estadísticamente similares entre ellas. En el experimento de campo se observo una producción adecuada, una buena tasa fotosintética, y un buen contenido relativo de clorofila con la aplicación de 448 Kg N/ha. La producción optima de materia seca (25,811 Kg/ha) se obtuvo a un IC de 300 días.en_US
dc.subjectClimatological parametersen_US
dc.subjectVertisol soilen_US
dc.subject.lcshSugarcane--Field experimentsen_US
dc.subject.lcshCrops and nitrogenen_US
dc.subject.lcshSoils--Nitrogen contenten_US
dc.subject.lcshNitrogen fertilizersen_US
dc.titlePhysiological response of sugarcane (Saccharum spontaneum, cv US 67-22-2) to nitrogen levelsen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2005 Salvio Torres-Justinianoen_US
dc.contributor.committeePérez-Alegría, Luis R.
dc.contributor.committeeOlmeda, Rafael F.
dc.contributor.representativeSalas Quintana, Salvador
dc.contributor.collegeCollege of Agricultural Sciencesen_US
dc.contributor.departmentDepartment of General Programs in Agricultural Sciencesen_US

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