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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 26, No. 3, 2008, pp. 355-358
Bioline Code: zt08063
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 26, No. 3, 2008, pp. 355-358

 en Inductive methods to maximize the germination of native germplasm seed in a greenhouse for agroforestry systems in Nayarit, Mexico
González, Yolanda Hermosillo; Ortega, Jorge Aguirre; Rodríguez, Raúl Alonso; Aguirre, Carlos Ortega; Gurrola, Agapito Gómez & Macías, Ramón Magaña

Abstract

For most legumes and other endemic plants for animal consumption, seed requires scarification methods and induction with giberilic acid (AG3), to obtain greater germination and growth of plants in the early stages. The objective of the study was to evaluate methods to improve germination on seeds of guaje ( Leucaena lanceolata check for this species in other resources ), guajillo (Leucaena lanceolota), catispa ( Gliricidia Sepium check for this species in other resources ), guacima ( Guazuma ulmifolia check for this species in other resources ), and capomo ( Brosimum alicastrum check for this species in other resources ) under 65% of shade with mesh. The study was located in a temperate subtropical climate with rains in summer, average precipitation annual 1,283 mm and average temperature annual 24ºC. Seeds of high vigor were collected and selected during the low water in localities of the entity. After 30 d of the collection, seed planting was done in a culture box, with a substrate made of sugar cane residues, sawdust, and pumice stone (1:1:0.5). A completely randomized design with eight treatments and three repetitions was used. The results of the variance analysis showed significant differences (P>0.05) among treatments. The highest germination was observed in seeds exposed to 75ºC for 30 sec and water soaking at 18ºC for 24 h with AG3 dose from 600 to 2,300 mg/L, and significantly higher (P>0,05) than the other treatments. The control treatment resulted with the smallest amount of germinated seed and the maximum germinative capacity of the species appeared between 3 and 10 d. Plants with doses from 2,300 to 300 mg/L of AG3 started stems, leaves, and roots elongation in all species, although there was a lag when change to plastic pots for establishment.

Keywords
scarification, giberelic acid, germination, greenhouse.

 
 es Métodos inductivos para maximizar la germinación de semilla de germoplasma nativo en vivero para sistemas silvopastoriles en Nayarit, México.
González, Yolanda Hermosillo; Ortega, Jorge Aguirre; Rodríguez, Raúl Alonso; Aguirre, Carlos Ortega; Gurrola, Agapito Gómez & Macías, Ramón Magaña

Resumen

En la mayoría de las leguminosas y otras plantas endémicas para consumo animal, la semilla requiere la escarificación e inducción con acido giberélico (AG3) para obtener la mayor germinación y crecimiento de plántulas en fase de vivero. El objetivo del estudio fue evaluar métodos favorecedores de germinación a semillas de guaje (Leucaena leucocephala), guajillo ( Leucaena lanceolata check for this species in other resources ), catispa ( Gliricidia Sepium check for this species in other resources ), guácima ( Guazuma ulmifolia check for this species in other resources ) y capomo ( Brosimum alicastrum check for this species in other resources ) al 65% de sombra artificial. El trabajo se condujo en un clima subtropical templado con lluvias en verano, precipitación media de 1.283 mm y temperatura media 24ºC. Se colectaron y seleccionaron semillas vigorosas durante el estiaje en localidades distintas de Nayarit. A 30 días de la colecta se realizó la siembra en cajas con un sustrato a partir de bagazo de caña, aserrín y piedra poma (1:1:0,5). Se utilizó un diseño completamente aleatorizado con ocho tratamientos y tres repeticiones. Los resultados del análisis de varianza mostraron diferencias significativas (P>0,05) entre tratamientos. El mayor valor de germinación fue en semillas expuestas en agua a 75ºC por 30 seg y remojo en agua a 18ºC por 24 h con dosis desde 600 a 2.300 mg/L de AG3 y superiores (P>0,05) al resto de los tratamientos. El testigo resultó inferior en semillas emergidas. La máxima capacidad germinativa de las especies se presentó de 3 a 10 d. Las plántulas con dosis de 2.300 a 300 mg/L de AG3 manifestaron de forma directamente proporcional mayor elongación de tallo, hojas y raíces en todas las especies, aunque hubo rezago del trasplante de plántulas a macetas para el establecimiento.

Palabras-clave
escarificación, acido giberélico, germinación, vivero.

 
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