Nutritional Characterization of Tomato Plants Grown in Coconut Husk Fiber Depending of the Concentration of the Nutrient Solution.

The nutrient absorption by plants is directly influenced by the electrical conductivity in the root, and thus, the concentration of the nutritive solution applied by drip irrigation tends to interfere with this process. The aim of this study was to characterize the absorption of nutrients by tomato plants depending on the concentration of the nutrient solution applied by fertigation on coconut husk fiber. The plants were cultivated in pots containing coconut husk fiber, fertilized with nutrient solution recommended for culture. The five nutrient solution concentrations were: 25%; 50%; 100% (original); 150%, and 200% of original concentration recommended. The nutrients P, S and Zn, obtained linear accumulation in the plants with increasing concentration. The opposite occurred with Ca, Mg, B and Mn, which, decreased in plants with increasing concentration of the nutrient solution. Increasing in the concentration of the nutrient solution had a negative influence on the absorption of most nutrients.