combinações de potássio e de de m agnésio

Productive parameters of tanzania grass grown with potassium and magnesium combinations. The objective was to obtain information for Panicum maximum v. Tanzânia related to the combined supply of potassium and magnesium, through the evaluation of the number of tillers and leaves, leaf area, leaf chlorophyll concentration, and shoots dry matter yield. An experiment was carried out in a greenhouse by using nutrient solution during the Spring season in Piracicaba, state of Sao Paulo. An incomplete 5 2 factorial was used, with potassium and magnesium rates, in a randomized block design, with four replications. Plants were harvested twice. Potassium and magnesium rate combinations highly influenced shoots yield in the second harvest. Potassium rates significantly changed the number of tillers and leaves, and leaf area at both g rowth periods, whereas forage yield was influenced only in the firs t growth. Magnesium rates resulted in changes in chlorophyll concentration in the two growths, but promoted changes in leaf area in the second growth.