Crecimiento y producción de hojas de Pittocaulon praecox (Asteraceae) en dos sitios contrastantes dentro de un matorral xerófilo en México
Growth and leaves production in Pittocaulon praecox (Asteraceae) from two contrasting sites in a xerophytic shrub land in Mexico
DOI:
https://doi.org/10.15446/caldasia.v42n2.73059Keywords:
biomasa, cobertura vegetal, factores abióticos, factores bióticos, fenología (es)abiotic factors, biomass, biotic factors, phenolog, plant cover (en)
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Se evaluó el efecto de la cobertura vegetal en la producción y crecimiento de hojas de Pittocaulon praecox en dos sitios contrastantes, cerrado y abierto, en un matorral xerófilo. En cada sitio se registró longitud, número de hojas y crecimiento total, temperatura, humedad, concentración de CO2, y cantidad de hojarasca producida. Se hizo un análisis de varianza de medidas repetidas y una prueba de t. La menor temperatura (20,79 ± 2,8 °C), mayor concentración de CO2 (169,10 ± 12,19) y humedad (40,13 ± 8,26) se registraron en el sitio cerrado, donde los arbustos crecen más (t118 = 3,83, P = 0,0002), producen más hojas (86,21 ± 43,31 gr) y alcanzaron mayor tamaño. Se concluye que la cobertura vegetal influye en el crecimiento y producción de hojas de Pittocaulon praecox.
The effect of vegetal cover on growth and leaves production of Pittocaulon praecox in two contrasting sites, close and open, in a xerophytic shrub was evaluated. In each site length, number of leaves, total growth, soil temperature, humidity, CO2 concentration and litter production were recorded. Data were analyzed by Repeated Measures Analysis of Variance and a t test. The low temperature (20.79 ± 2.8 °C), higher CO2 concentration (169.10 ± 12.19) and humidity (40.13 ± 8.26) were recorded in the close site were shrubs are taller (t118 = 3.83, P = 0.0002) and produce more leaves (86.21 ± 43.31 gr). The vegetal cover has an important effect on growth and leaves production of Pittocaulon praecox in the studied area.
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