Resumen

PARRA-TERRAZA, Saúl. Relations NO ₃ ^- /anions and K ⁺ /cations in the nutrient solution for the growth of tomato seedlings. Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.7, pp.1527-1538. ISSN 2007-0934.

In Sinaloa, tomato production in open field and in protected agriculture using seedlings produced in greenhouses. In the pre-transplant nutrition it is one of factors affecting growth and nutrient status of seedlings, so that the objective of this study was to evaluate the effect of three ratios NO3-/ anions and three K+/ cations in the nutrient solution on growth, mineral composition and nutrient extraction tomato seedlings cv. 3832. The experimental design was completely randomized factorial arrangement of treatments 32 with four replications. At 40 days after planting, growth data were taken and the concentration of N, P, K, Ca and Mg in leaves and stems and nutrient extraction was determined. The NO3-/anions x K+/cation interaction was significant for seedling height, stem diameter and dry weight and affected the concentrations and removals of N, P and K in stems. The relationship 80/100 NO3 -/anions increase (p ≤ 0.05) dry weight, concentration and extraction of N and K in leaves, while the percentage ratio 55/100 K+/cations increased (p≤ 0.05) concentration and extracting sheet K and Mg reduced. In selecting tomato seedlings for transplantation should be considered the effect of NO3 -/anions x K+/cation interaction on the variables height, diameter and dry weight of stem, the nutritional status of seedlings and environmental conditions of the area of production.

Palabras llave : Solanum lycopersicum L.; percentage ratio K⁺/cations; percentage ratio NO₃ ^-/anions; seedling growth.