Abstract

BRANCO, Roberto B. F. et al. Grafting and carbonated irrigation water in transport of ¹⁵N and in the tomato production. Rev. bras. eng. agríc. ambient. [online]. 2007, vol.11, n.4, pp. 374-379. ISSN 1807-1929.  http://dx.doi.org/10.1590/S1415-43662007000400005.

The effects of CO₂ application through irrigation water, and of grafting in transport of ¹⁵N and in the tomato production, were studied. These treatments were arranged in a 2 x 2 factorial scheme (with and without CO₂ in irrigation water and grafted and non-grafted tomato), in a completely randomized design, with four replications. The injection of CO₂ into the water began at 34 days after transplant of seedlings (DAT) and continued for all irrigations. The application of the sulfate of ammonium with abundance in atoms of ¹⁵N of 3.13% in plants destined to analysis was done at 45 DAT when the plants were in the middle of fructification. After 14 days of fertilizer (¹⁵N ) application the plants were harvested, washed, dried and sent for analysis of ¹⁵N in plant tissue. The results demonstrated that CO₂ and the grafting did not alter the transport of ¹⁵N in the plant. The production of commercial fruits was larger when CO₂ was applied in water.

Keywords : Lycopersicon esculentum Mill; carbon dioxide; protected cultivated.