This experiment was carried out to investigate the effects of potassium and dolomite on dry matter yield and quality of signal grass (Brachiaria decumbens Stapf.). It was laid out in a 4x3 factorial arranged in a randomized complete block design (RCBD) with four replications. Application rates of potassium sulphate fertiliser (K) were 0, 125, 250 and 500 kg K2O/ha and dolomite rates (D) were 0, 625 and 2,500 kg/ha. Total dry matter yield (DM yield) of four cuts significantly increased (p<0.01) with an increase in K only up to 125 kg K2O/ha. Dolomite application did not show any significant effect (p>0.05) on DM yield. There was no significant (p0.05) K x D interaction for DM yield and forage quality. K did not affect (p>0.05) crude protein (CP), neutral detergent fibre (NDF) and acid detergent fibre (ADF) contents except for CP and NDF in rainy season. K at 125 kg K2O/ha slightly increased CP content cf. control in rainy season. D did not affect (p0.05) CP, NDF, ADF and dry matter degradability (DMD) in rainy and dry seasons. The highest K application rate significantly decreased (p<0.01) DMD in both seasons.
|Publication status||Published - Jan 2014|