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Allometric models for estimating the area of leaflets of pea (Pisum sativum L.)
Allometric models for estimating the area of leaflets of pea (Pisum sativum L.)
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Allometric models for estimating the area of leaflets of pea (Pisum sativum L.)
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Allometric models for estimating the area of leaflets of pea (Pisum sativum L.)
Allometric models for estimating the area of leaflets of pea (Pisum sativum L.)
Journal Article

Allometric models for estimating the area of leaflets of pea (Pisum sativum L.)

2007
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Overview
La estimación del área foliar de la plantas a partir de las dimensiones de las hojas, sin recurrir a métodos destructivos, permite evaluar los factores que afectan el crecimiento de los cultivos de una manera precisa y en intervalos cortos de tiempo. Con el fin de establecer un modelo para calcular el área foliar de la arveja (Pisum sativum L.) en ambientes de trópico alto propios de la Sabana de Bogotá, se sembraron dos lotes de arveja v. 'Santa Isabel' cada uno con 2 ha de extensión en dos semestres diferentes. En cada lote se marcaron 32 puntos para la toma de muestras, de cada punto se escogieron 20 hojas y de cada hoja se tomaron todos los foliolos para medir el largo y el ancho mediante análisis de imágenes. En uno de los lotes se hicieron evaluaciones a los 42 y 62 días después de la siembra; en el otro lote se hizo una única evaluación 72 días después de la siembra. Se estableció que el área de los foliolos y las estípulas de arveja se puede calcular eficientemente mediante modelos alométricos convencionales (largo y ancho) durante las etapas vegetativa y reproductiva del cultivo. El área de estos órganos también se puede estimar con base únicamente en la longitud de la lámina (bajo la forma 0,366L2), modelo con un solo factor que redujo a la mitad el tiempo de evaluación y fue aplicable por igual a los dos ciclos de crecimiento y las dos edades de cultivo. The estimation of foliar area of plants from leaf dimensions, without using destructive methods, allows evaluation of the factors that affect the growth of crops in an precise manner and in short time intervals. In order to establish a model to calculate the foliar area of pea (Pisum sativum L.) in high tropical environments typical of the Sabana of Bogota, two 2-ha plots of 'Santa Isabel' variety peas were sown in each of two different semesters. In each plot 32 points were marked for sampling and at each point 20 leaves were chosen and all leaflets from each leaf were measured for length and width using image analysis. In one plot evaluations were made at 42 and 62 days after sowing; in the other plot only one evaluation was made at 72 days after sowing. It was established that the area of the pea leaflets and stipules can be efficiently calculated using conventional allometric models (length and width) during the vegetative and reproductive stages of the crop. The area of these organs can also be estimated based solely on the length of the lamina (under the formula, 0.336 L2), a model with only one factor that reduced in half the time of evaluation and was applicable equally to both growth cycles and crop ages.