Abstract

CRISOSTOMO CRISOSTOMO, María Natividad et al. Ammonium/nitrate ratios in acid and alkaline solutions nutritious blueberry. Rev. Mex. Cienc. Agríc [online]. 2014, vol.5, n.3, pp.525-532. ISSN 2007-0934.

The aim ofthis study was to evaluate the growth of cranberry (Vaccinium sp.) Cv. Biloxi during the vegetative phase, application of NH⁺₄ ratios /NO^-₃ in nutrient solutions of acid and alkaline Steiner through the variables: plant height, shoot length and nutrient concentration in leaf tissue. The experiment was conducted under a design in randomized complete block with ten treatments and twelve repetitions, the analysis of variance of the variables were performed using the Proc GLM of SAS version 8.2, for the mean comparison test Tukey (p< 0.05). Plants showed increased growth when the NH⁺₄/NO^-₃ratio was 0/100 and pH of 5, while a ratio NH⁺₄/NO^-₃ 50/50 favored the length and the size of sheets only during week1 without showing significant in the later stages. Regarding the nutrient concentrations in the leaf tissue, a ratio NH⁺₄/NO^-₃ 100/0 and pH 5 favored a higher content of Ca and Mg (2.02 and 0.21%, respectively) as well as Mn and Zn (300 and 9.75 mg L^-1, respectively), but in the case of K, the higher leaf content of this element (4.97%) was for plants with a NH⁺₄/NO^-₃ ratio of 0/100 and pH 6. These results suggest that cranberry cv. Biloxi is capable of taking both N as NH4⁺ and NO3^- during the vegetative phase.

Keywords : Steiner; pH; ammonium/nitrate ratio; nutrient solution.