Gibberellic acid effect on sprouting and nutritional balance of young trees of 'Keitt' mango at the Mayo Valley, Sonora.
Sánchez-Sánchez E., Cabrera-Carbajal F., Padilla-Valenzuela I., Samaniego Russo J. A., Aboytia-Mendivil R.
Author Affiliation: Escuela de Agricultura, Universidad de Sonora, Navojoa, Sonora, Mexico.
: 447-452
Abstract : A study was conducted in Mexico to determine the amount of floral inhibition induced by 50 ppm gibberellic acid applied through different developmental stages of mango (cv. Keitt) trees six months after planting. Treatments comprised: July; July-September; July-September-November; July-September-November-January; September; September-November; September-November-January; November; November-January; and control treatment (no spraying). Spraying in September-November-January and in July-September-November-January inhibited floral budding by 77 and 55%, respectively. Statistical differences occurred in relation to other treatments. The control showed 95% flowering. Leaf analysis revealed a general decrease in nutrient concentration except for Ca, but a strong negative effect on nitrates (NO3-N), Fe and Zn. Afterwards, generally high levels of nutrient concentration were observed again mainly in those elements that were strongly affected at the beginning of this study. Inducing high levels of vegetative sprouting positively affected and improved nutrient availability and uptake capacity.