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The use of growth regulators or phytoregulators, is an alternative to increase flowering in the Pinaceae family. In this study, we examined the effects of the application of growth regulators (plant growth regulators) on vegetative shoots and male strobili of Pinus pinea L. Selected phytohormones were gibberellic acid (GA 4/7 ), naphthalenacetic acid (NAA) and benzylaminopurine (BAP), combined in seven treatments, including control. These regulators were used in a 16 year-old plantation of Pinus  pinea , located in Toconey, Pencahue, region of Maule-Chile. The treatments were applied in five dates (August to November). At the end of the applications, the following variables were evaluated: male flowering, number of vegetative buds and new buds and apical shoot length. The main results indicate that treatment T1 (GA 4/7 ), is the most significant one on the male flower, showing a 99,6% increase in catkins regarding control branches, and it also had a significant effect on the length of apical buds, more than doubling the length of control. The number of vegetative buds, application of 500 mg L-1 showed significant differences BAP, obtaining an increase of 414.3% compared to the control treatment.

ciência florestal

INFLUENCIA DEL USO DE REGULADORES DE CRECIMIENTO SOBRE BROTES VEGETATIVOS Y NÚMERO DE ESTRÓBILOS MASCULINOS EN &lt;i&gt;Pinus pinea&lt;/i&gt; L. EN CHILE