Acta Agronómica (Sep 2006)

Arylsulphatase in the rhizosphere of plantain Musa AAB and its relation with growth, development and pr Arilsulfatasa en la rizosfera de plátano, Musa AAB y relación con crecimiento, desarrollo y produccion

  • Rao Idupulapati M,
  • Bolaños B Martha M,
  • Sanchez de Prager Marina

Journal volume & issue
Vol. 55, no. 3
pp. 11 – 14

Abstract

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<p align="justify">Arylsulphatase in the rhizosphere of plantain <em>Musa</em> AAB and its relation with growth, development and production. In a plantain crop (<em>Musa</em> AAB) of the Central coffee growing zone of Colombia, arylsulphatase activity in a <em>Pachic Melanudand Medial Isotermic</em> soil under three agronomic management systems during 18 months was measured. Measurements were done at 6, 12 and 18 months in four depths, 0-5, 5-10, 10-20, 20-30 cm. The highest arylsulphatase activity (60%) was found in the first 10 cm, with a decreasing in depth. Statical analysis did not show significant differences among the three plant ages. Arylsulphatase activity was found between 164 <em>&micro;</em>mol g<sup>-1</sup> min<sup>-1</sup> and 319 <em>&micro;</em>mol g<sup>-1</sup> min<sup>-1</sup>. The lowest activity was found in the rhizosphere of plants with 12 months of age (flowering) under chemical management. Arylsulphatase activity showed very significant correlation with Biomass-C and with Mg in soil, number of leaf and the plantain bunch weight.</p><p align="justify"><strong>Key words:</strong> Enzymic activity-arylsulphatase, andisol, <em>Musa</em> ABB</p><p align="justify">En la zona central cafetera de Colombia, en un suelo <em>Pachic Melanudands medial isot&eacute;rmico</em>, se midi&oacute; la actividad de arilsulfatasa en rizosfera de pl&aacute;tano <em>Musa</em> AAB, en tres sistemas de manejo agron&oacute;mico (qu&iacute;mico o convencional, tradicional y ecol&oacute;gico), cuatro profundidades (0-5, 5-10, 10-20 y 20-30 cm) y tres edades de cultivo (6 meses &ndash; diferenciaci&oacute;n floral, 12 meses &ndash; floraci&oacute;n, 18 meses - cosecha). La mayor actividad (60%) se encontr&oacute; en los primeros 10 cm., y disminuy&oacute; a medida que se profundiz&oacute; en el perfil del suelo. El an&aacute;lisis estad&iacute;stico no mostr&oacute; diferencias significativas entre los tres manejos o entre edades de planta. La actividad de arilsulfatasa se encontr&oacute; entre 164 &micro; mol g-1 min-1 y 319 &micro; mol g-1 min-1. La m&aacute;s baja actividad se observ&oacute; en la rizosfera de plantas de 12 meses (floraci&oacute;n) y con manejo qu&iacute;mico. La actividad de este enzima correlacion&oacute; muy significativamente con biomasa microbiana carbono (BMC) y muy significativamente con el contenido de Mg, n&uacute;mero de hojas emitidas y peso del racimo de pl&aacute;tano.</p><p align="justify"><strong>Palabras clave:</strong> <em>Musa</em> ABB. Actividad enzim&aacute;tica - arilsulfatasa, andisol, </p>

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