Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest

Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest

The use of raw materials of Jatropha curcas L. to produce biofuel is of increasing interest in Colombia; little information is available on this species as a crop. This research evaluated plant height (Hp) and basal stem diameter (BSD) of J. curcas as affected by different rates of nitrogen (N) and potassium (K) during the first 435 days of growth (DAP). The experiment involved a repeated measures design with inter-subject factors of fertilization (N dose, K2O dose nested in N dose) and an intra-subject factor of evaluation time. The Hp varied both as a function of N dose and the K2O dose nested in the N dose. The tallest plants were obtained with 150 kg ha-1 N and 180 kg ha-1 K2O treatment. With simultaneous confidence intervals of Bonferroni, we compared the evaluation times indicating for Hp non-overlapping intervals at 435 DAP (150 kg ha-1 N and remaining levels of this factor) and at 255 DAP (180 kg ha-1 K2O and remaining levels of this factor). The application of N fertilizers resulted in thicker stems as compared to control plants. Mathematical predictive models were obtained for Hp and BSD in J. curcas using a multiple regression analysis. These models permitted future rapid and non-invasive predictions for J. curcas growth in the field.

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Main Authors: Montenegro, Omar, Magnitskiy, Stanislav, Darghan, Aquiles
Format: Digital revista
Language:eng
Published: Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias Agrarias 2019
Online Access:https://revistas.unal.edu.co/index.php/agrocol/article/view/78172
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spelling oai:www.revistas.unal.edu.co:article-781722020-03-30T23:02:39Z Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest Efecto del nitrógeno y el potasio en la altura de la planta y el diámetro del tallo de Jatropha curcas L. en el bosque seco tropical de Colombia Montenegro, Omar Magnitskiy, Stanislav Darghan, Aquiles growth modeling macronutrients mineral nutrition Euphorbiaceae crecimiento modelación macronutrientes nutrición mineral Euphorbiaceae The use of raw materials of Jatropha curcas L. to produce biofuel is of increasing interest in Colombia; little information is available on this species as a crop. This research evaluated plant height (Hp) and basal stem diameter (BSD) of J. curcas as affected by different rates of nitrogen (N) and potassium (K) during the first 435 days of growth (DAP). The experiment involved a repeated measures design with inter-subject factors of fertilization (N dose, K2O dose nested in N dose) and an intra-subject factor of evaluation time. The Hp varied both as a function of N dose and the K2O dose nested in the N dose. The tallest plants were obtained with 150 kg ha-1 N and 180 kg ha-1 K2O treatment. With simultaneous confidence intervals of Bonferroni, we compared the evaluation times indicating for Hp non-overlapping intervals at 435 DAP (150 kg ha-1 N and remaining levels of this factor) and at 255 DAP (180 kg ha-1 K2O and remaining levels of this factor). The application of N fertilizers resulted in thicker stems as compared to control plants. Mathematical predictive models were obtained for Hp and BSD in J. curcas using a multiple regression analysis. These models permitted future rapid and non-invasive predictions for J. curcas growth in the field. El uso de materias primas vegetales de Jatropha curcas L. para producir biocombustibles es de creciente interés en Colombia, mientras que hay poca información disponible sobre esta especie como cultivo. Este estudio evaluó la altura de la planta (Hp) y el diámetro del tallo basal (BSD) de J. curcas según lo afectado por las diferentes dosis de nitrógeno (N) y potasio (K) durante los primeros 435 días de crecimiento (DAP). El experimento incluyó un diseño de medidas repetidas con factores de fertilización entre sujetos (dosis de N, dosis de K2O anidadas en la dosis de N) y un factor de tiempo de evaluación. La Hp varió tanto en función de la dosis de N como de la dosis de K2O anidada en la dosis de N, obteniéndose las plantas más altas con aplicación de 150 kg ha-1 N y 180 kg ha-1 K2O. Con los intervalos de confianza simultáneos de Bonferroni, se compararon los tiempos de evaluación indicando para Hp intervalos no superpuestos a 435 DAP (150 kg ha-1 N y niveles restantes de este factor) y a 255 DAP (180 kg ha-1 K2O y el resto niveles de este factor). La aplicación de fertilizantes N dio como resultado tallos más gruesos en comparación con las plantas de control. Los modelos de predicción matemática se obtuvieron para Hp y BSD en J. curcas utilizando un análisis de regresión múltiple. Estos modelos permiten en futuro predicciones rápidas y no invasivas del crecimiento de J. curcas en campo. Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias Agrarias 2019-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unal.edu.co/index.php/agrocol/article/view/78172 10.15446/agron.colomb.v37n3.78172 Agronomía Colombiana; Vol. 37 No. 3 (2019); 203-212 Agronomía Colombiana; Vol. 37 Núm. 3 (2019); 203-212 Agronomía Colombiana; v. 37 n. 3 (2019); 203-212 2357-3732 0120-9965 eng https://revistas.unal.edu.co/index.php/agrocol/article/view/78172/73515 Copyright (c) 2019 Agronomía Colombiana https://creativecommons.org/licenses/by-nc-sa/4.0
institution UNAL
collection OJS
country Colombia
countrycode CO
component Revista
access En linea
databasecode rev-agrocol
tag revista
region America del Sur
libraryname tema Nacional de Bibliotecas de la UNAL
language eng
format Digital
author Montenegro, Omar
Magnitskiy, Stanislav
Darghan, Aquiles
spellingShingle Montenegro, Omar
Magnitskiy, Stanislav
Darghan, Aquiles
Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest
author_facet Montenegro, Omar
Magnitskiy, Stanislav
Darghan, Aquiles
author_sort Montenegro, Omar
title Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest
title_short Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest
title_full Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest
title_fullStr Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest
title_full_unstemmed Effect of nitrogen and potassium on plant height and stem diameter of Jatropha curcas L. in Colombian tropical dry forest
title_sort effect of nitrogen and potassium on plant height and stem diameter of jatropha curcas l. in colombian tropical dry forest
description The use of raw materials of Jatropha curcas L. to produce biofuel is of increasing interest in Colombia; little information is available on this species as a crop. This research evaluated plant height (Hp) and basal stem diameter (BSD) of J. curcas as affected by different rates of nitrogen (N) and potassium (K) during the first 435 days of growth (DAP). The experiment involved a repeated measures design with inter-subject factors of fertilization (N dose, K2O dose nested in N dose) and an intra-subject factor of evaluation time. The Hp varied both as a function of N dose and the K2O dose nested in the N dose. The tallest plants were obtained with 150 kg ha-1 N and 180 kg ha-1 K2O treatment. With simultaneous confidence intervals of Bonferroni, we compared the evaluation times indicating for Hp non-overlapping intervals at 435 DAP (150 kg ha-1 N and remaining levels of this factor) and at 255 DAP (180 kg ha-1 K2O and remaining levels of this factor). The application of N fertilizers resulted in thicker stems as compared to control plants. Mathematical predictive models were obtained for Hp and BSD in J. curcas using a multiple regression analysis. These models permitted future rapid and non-invasive predictions for J. curcas growth in the field.
publisher Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias Agrarias
publishDate 2019
url https://revistas.unal.edu.co/index.php/agrocol/article/view/78172
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