SciELO - Scientific Electronic Library Online

 
vol.39 issue3Growth regulators and activity invertases in the middle of the cropping seasonAlteration of the physiologic characteristics in banana under fertirrigation conditions author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Ciência Rural

Print version ISSN 0103-8478

Abstract

LEITE, Glauber Henrique Pereira et al. Technological quality, productivity and agricultural contribution margin of sugarcane in function of plant regulators application at the beginning of the cropping season. Cienc. Rural [online]. 2009, vol.39, n.3, pp. 726-732. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782009000300015.

The ripening sugarcane is the most important aspect in production sistem for sugar and alcohol industry. The objective of this research was to evaluate technological quality, productivity and agricultural contribution margin of sugarcane variety RB855453 in function of plant regulators application at the beginning of the cropping season, in Igaraçu do Tietê (SP), Brazil was studied. The experiment was carried out in a randomized block design with five replications. The treatments consisted of four plant regulators application of the class of growth retainers (Ethephon, Ethyl.trinexapac, Potassium nitrate and Potassium nitrate + Boron, in dosage commercial products of 2L ha-1, 0.8L ha-1, 3kg ha-1, e 3kg ha-1, respective) and a control (natural ripening). The maturators, general manner, provided the improvement technological quality of stems with positive reflex in productivity of sugar and agricultural contribution margin. The maturators Potassium nitrate + Boron, Ethephon and Ethyl-trinexapac, under weather conditions unfavourable to natural ripening process of sugarcane, allowed to anticipate the crop in five, eight, and twenty-five days, respectively, in relation a control treatment. In the subsequent crop season, under optimus weather conditions the ripening process of sugarcane, had no difference when compared to the control treatment.

Keywords : Saccharum spp.; ripening; ethephon; ethyl-trinexapac; potassium nitrate.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese