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Effects of Nitrogen and Potassium On Dry Matter Production Of Tomato Irrigated With Saline Water

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  032235,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13809) @2003
Authors:   Flávio Favaro Blanco, Marcos Vinícius Folegatti, Edivaldo Casarini,
Keywords:   Lycopersicon esculentum, soil solution, salinity

The experiment was conducted in a greenhouse from October 2001 to February 2002, in order to verify the effects of nitrogen and potassium on tomato tolerance to salinity. Tomato seedlings, hybrid Facundo, were transplanted on October 23, 2001 to pots filled with a sandy-loam soil. Treatments were composed of three nitrogen (7.5, 15.0 and 22.5 g plant-1) and potassium (8, 16 and 24 g K2O plant-1) levels, given 9 treatments with five replications. NaCl and CaCl2 were added to irrigation water in order to obtain an electrical conductivity of 10 dS m-1. Dry matter of leaves, stem+clusters and fruits were recorded and results showed that the N had no effect on dry matter production, while K had some effects but the results were not in agreement with the concentrations of NO3, K and Na in leaves and in soil solution. Herewith, it was concluded that N nor K had effects in alleviating the salt stress for tomato plants under high saline conditions.

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