FOLIAR SPRAING OF KELP EXTRACT, L-GLUTAMIC ACID AND CALCIUM ON COMMON BEANS

Abstract

This work had as aim to evaluate the effects of foliar application of Ascophyllum nodosum extract, L-glutamic acid and Ca⁺², alone or in mixed solutions, over growth and grain production of common bean (Phaseolus vulgaris L.). The research was carried out in greenhouse with the following treatments: without application; solution with 60 g L^-1 L-glutamic acid; solution with 60 g L^-1 extract; solution of CaCl₂ with 100 g L^-1 de Ca⁺²;  mixed solution with 30 g L^-1 L-glutamic acid, and 30 g L^-1 extract; mixed solution with 30 g L^-1 L-glutamic acid and 100 g L^-1 Ca^{+2 in CaCl}₂ form; mixed solution with 30 g L^-1extract and 100 g L^-1 Ca⁺²; mixed solution with 15 g L^-1 L-glutamic acid, and 15 g L^-1 extract, and 100 g L^-1 Ca⁺². The solutions were diluted in water at 3 ml L^-1 concentration, and have been sprayed over the plants, on 12, 28 and 42 days after the emergence. Biometrical parameters were evaluated during plants growth, and at the end, the grain production was quantified.  Data analysis has shown the effect of solutions in plants growth and grain production, characterizing the biostimulant effect of the mixed solution with 30 g L^-1 extract and 100 g L^-1 Ca⁺², and the mixed solution with 15 g L^-1  L-glutamic acid, and 15 g L^-1 extract, and 100 g L^-1 Ca⁺².