2 results

Root morphology and potassium uptake kinetic parameters in irrigated rice genotypes

Fernanda San Martins Sanes, Rosa Maria Vargas Castilhos, Walkyria Bueno Scivittaro, Ledemar Carlos Vahl, Júlia Rodegheiro de Morais

01/Jun/2013

The efficiency of uptake of a nutrient by plants is a function of their physiological and morphological properties, which may vary between cultivars of the same species. A study was carried out to determine root morphology and kinetic parameters of potassium (K) uptake in rice genotypes. The experiment was conducted in a laboratory and the plants cultivated in pots under artificial light. Treatments were represented by 11 rice genotypes (Avaxi, BRS Atalanta, BRS Bojuru, BRS Fronteira, BRS Querência, CNA 10754, […]

Effect of humic-like substances on potassium uptake kinetics, plant growth and nutrient concentration in Phaseolus vulgaris L.

Carla Machado da Rosa, Rosa Maria Vargas Castilhos, Ledemar Carlos Vahl, Danilo Dufech Castilhos, Luiz Fernando Spinelli Pinto, Elisandra Solange Oliveira, [...]

01/Aug/2009

Humic substances can influence plant metabolism direct or indirectly, thus modifying its growth. The objective of this study was to evaluate the effect of humic-like substances (HS) on kinetics of K uptake, nutrient concentration and growth of common bean (Phaseolus vulgaris, L.). The experiment was performed on a laboratory bench with controlled light conditions. Plants were grown in pots with complete nutrient solution enriched with five levels (0; 2.5; 5; 10 and 20 mg L-1 of C) of alkaline soluble humic-like substances […]