Efecto de la frecuencia e intensidad de defoliación sobre la producción de biomasa, capacidad de rebrote y estructura de raíces de plantago lanceolata l.
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Date
2024
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Universidad de Concepción
Abstract
En Plantago lanceolata L. se estudiaron tres intervalos de cortes en base al largo de hoja extendida (LHE) (15, 25 y 35 cm) y dos alturas de cortes en base a la altura residual (AR) (5 y 8 cm) distribuidos en un diseño de bloques al azar en arreglo factorial de 3 x 2 con 4 repeticiones. Se midió la producción de biomasa en materia seca (MS), la capacidad de rebrote y estructura de raíces. No hubo efecto de la interacción (P > 0,05) frecuencia x altura de corte. La producción de biomasa, % biomasa de tallos y % de materia seca (MS) por corte fueron superiores para los intervalos de cortes menos frecuentes (35 cm). La tasa de crecimiento y aparición de las hojas nuevas, y la cantidad de hojas y tallos al corte fueron inferiores para el tratamiento con intervalos de cortes más frecuentes (15 cm), mientras que la tasa de crecimiento de las hojas residuales fue inferior para el tratamiento con intervalos de cortes menos frecuentes (35 cm). No hubo diferencias significativas en cuanto a la longitud de las raíces (P > 0,05), mientras que el tratamiento con intervalos de cortes menos frecuentes (35 cm) presentaron raíces con un área y volumen superior.
In order to evaluate the effect of three cutting intervals based on the extended leaf length (ELL) (15, 25 and 35 cm) and two cutting heights based on the residual height (RH) (5 and 8 cm) a randomized block design with a 3 x 2 factorial arrangement and four replicates was used to study Plantago lanceolata L. Biomass production, regrowth capacity and root structure was measured. No interaction effect was observed between frequency and cutting height for studied variables (P > 0,05). The production of biomass, % stem biomass and % DM per cut were higher for the less frequent cutting intervals (35 cm). The growth rate of new leaves, the rate of appearance of new leaves and the number of leaves and stems at cut were lower for the treatment with a more frequent cutting intervals (15 cm), the growth rate of residual leaves was lower for treatment with less frequent cutting intervals (35 cm). There were no significant differences in root length (P > 0,05), while treatment with less frequent cutting intervals (35 cm) presented roots with a larger area and volume.
In order to evaluate the effect of three cutting intervals based on the extended leaf length (ELL) (15, 25 and 35 cm) and two cutting heights based on the residual height (RH) (5 and 8 cm) a randomized block design with a 3 x 2 factorial arrangement and four replicates was used to study Plantago lanceolata L. Biomass production, regrowth capacity and root structure was measured. No interaction effect was observed between frequency and cutting height for studied variables (P > 0,05). The production of biomass, % stem biomass and % DM per cut were higher for the less frequent cutting intervals (35 cm). The growth rate of new leaves, the rate of appearance of new leaves and the number of leaves and stems at cut were lower for the treatment with a more frequent cutting intervals (15 cm), the growth rate of residual leaves was lower for treatment with less frequent cutting intervals (35 cm). There were no significant differences in root length (P > 0,05), while treatment with less frequent cutting intervals (35 cm) presented roots with a larger area and volume.
Description
Tesis presentada para optar al título de Ingeniero Agrónomo
Keywords
Defoliación, Biomasa vegetal, Fisiología vegetal