Effects of phosphorus fertilization and harvesting stage on forage yield and quality of common vetch

The present study was conducted to evaluate the effects of phosphorus rate (0, 30, 60, 90 and 120 kg ha(-1)) and harvesting stage (beginning of flowering, full flowering, and seed filling) on forage yield and quality of common vetch (Vicia sativa L.). Dry matter (DM) yield, N, P, K, ADF, NDF, TDN and RFV were determined. Phosphorus rates and harvesting stages significantly affected most of the quality components determined in common vetch. Phosphorus applications increased DM yield and N and P contents with TDN and RFV but decreased K, ADF and NDF. Harvesting at the late stages caused reduction in forage quality. N, P, K contents with TDN and RFV decreased with advancing stages while DM yield, ADF and NDF contents increased.