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ARTÍCULO
TITULO

Effects of the foliar application of methanol on the yield and growth of rice (Oryza sativa cv. Shiroudi)

Abouzar Abbasian    
Bahram Mirshekari    
Mohammad N. Safarzade Vishekaei    
Varahram Rashidi    
Hashem Aminpanah    

Resumen

Approximately two decades have passed since it was reported that the foliar application of methanol increased plant biomass and yield. Many subsequent reports have been published concerning the ability or inability to reproduce these initial observations. To evaluate the effect of methanol on rice (Oryza sativa cv. Shiroudi) yield and rice components, a field experiment was conducted at the Tonekabon Rice Research Station in Iran in 2012 and 2013. The experiment had a randomized complete block design (RCBD) with three replicates. The plants were treated with aqueous methanol solutions (0, 6, 12, 18, and 24% (v/v)). Methanol was sprayed on the rice foliage three times during the experimental period at two-week intervals. The results indicated that, in general, the methanol did not affect rice growth or yield and seemed to be ineffective as a growth enhancer, so foliar spraying of aqueous methanol cannot be recommended for rice. The negative results could be due to the absence of Methylobacterium sp. or that the effects are cultivar-specific because positive effects on the growth and yield of rice have been reported in other cultivars. Hace aproximadamente dos décadas se informó que la aplicación foliar de metanol produce aumento de la biomasa y el rendimiento de las plantas. Desde entonces, muchos informes han sido publicados describiendo la capacidad o incapacidad de reproducir estas observaciones iniciales. Con el fin de evaluar el efecto de metanol en el arroz (Oryza sativa cv. Shiroudi) en el rendimiento y sus componentes, se desarrolló un experimento de campo en la Estación de Investigación del Arroz de Tonekabon, Irán, durante 2012 y 2013. El diseño estadístico usado fue de bloques completamente aleatorios (DBCA), con tres repeticiones. Los tratamientos estudiados fueron soluciones acuosas de metanol (0, 6, 12, 18 y 24% (v / v)). El metanol se pulverizó sobre partes de follaje de arroz tres veces durante su período  de crecimiento, con intervalos de dos semanas. Los resultados de estos experimentos indicaron que, en general, el metanol no afectó el crecimiento y el rendimiento del arroz y, por lo tanto, parecía ser ineficaz como un promotor de crecimiento, en cambio, no se pueden recomendar pulverizaciones foliares de metanol acuoso para el arroz. Esto podría ser debido a la ausencia del Methylobacterium sp. o que el cultivar no ha sido adecuada, ya que otros cultivares de arroz se produce un efecto positivo en el crecimiento y rendimiento de arroz. Se otorgan mayores comentarios en las conclusiones finales del estudio.

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