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handle: 10261/61224
[ES] Se estudia la capacidad rizogénica y toxicidad de diversas sustancias hormonales empleadas en el enraizamiento del castaño, ya que a veces los fenómenos tóxicos que acompañan a la formación de raíces son tan intensos que invalidan el tratamiento. Las raíces producidas con AIB son las más adecuadas para obtener castaños de crecimiento vigoroso. La dosis óptima de esta sustancia es de 12 mg/g; mayores concentraciones pueden presentar fenómenos tóxicos. La capacidad rizogénica de la mezcla integrada por 5 mg/g AIB + 5 mg/g ANA se incrementa notablemente introduciendo 0,1-0,3 mg/g de 2,4-D o mejor de alguna de sus sales. No son recomendables concentraciones mayores de estas sustancias por producir toxicidad. La adición de CMFA a la mezcla básica hormonal no favorece el enraizamiento. La sustitución del 2,4-D por 2,5-D produjo débil reacción sin enraizamiento. La toxicidad de los tratamientos corre pareja con su capacidad de enraizamiento, siendo máxima en el mes de mayo y disminuye en junio.
[EN] Chestnut rooting by growth promoting substances may be accompanied by some indesirable toxic phenomenons which may make avoid practical application of such substances. In order to know the best treatments for chesnut rooting, they have been studied different growth promoting substances employed under mixtures or alone. The best results were obtained when 12 mg/g IBA was applied, with higher concentrations toxicity may become evident. For the basic mixture 5 mg/g IBA + 5 mg/g NAA, its rooting capacity is increased by adding 0,1-0,3 mg/g of 2,4-D or much better some its derivatives. For the later chemical no higher concentrations are recomended, so they are toxic. Nor the CMFA addition to the basic mixture neither sustitution of 2,4-D for 2,5-D are not of practical interest so rooting was not induced. For some treatments there are a close correlationship between their rooting capacity and toxicity, which show the maximum during May and decrease at June.
Peer reviewed
Hormonas vegetales, Castanea sativa, Chestnut, Growth promoting substances, Enraizamiento, Capacidad rizogénica, Rooting capacity
Hormonas vegetales, Castanea sativa, Chestnut, Growth promoting substances, Enraizamiento, Capacidad rizogénica, Rooting capacity
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