Determination of the Varying of Vegetation Harvested Hungarian Vetch and Wheat Mixture on Nutrient Content, Degradation Kinetics, in Vitro Digestibility and Relative Feed Value

Abstract

Hungarian vetch intercropped with wheat (50%:50%) planted at dryland in Autumn. and were harvested 7 times at 1 wk intervals throughout mid June and late July. The aim of study was to determined the effects of varying harvested of the mixture on nutrient content in vitro digestibility. relative feed value (RFV) and rumen degradation kinetics. While harvest effect did not differ hay of Hungarian vetch + wheat on dry matter (DM), ash and organic matter, NDF and ADF ratios increased, and the crude protein ratios increased up to July. 20 degradabilities were determined between 30.10-53.24% and its were statistically decreased with increasing maturity (P<0.01). Forage yield 1385-1643 kg/da. dry herbage yield 363-654 kg/da and dry matter yield 344-621 kg/da were throughout harvesting period. Forage yield increased significantly as from July. 6 the harvesting stage (P<0.01). in vitro dry matter digestibilities of the mixtures hay declined rapidly because of maturity from first harvesting to end harvesting (P<0.01). RFV of the mixtures were determined between 106-180. The DM degradabilities in rumen decreased with delaying harvest of the mixtures. Degradation rates of the mixtures were not statistically founded between 0.015-0.033 h-1. Effective DM degradabilities were determined between 30.10-53.24% and its were statistically decreased with increasing maturity (P<0.01). In conclusion, according to investigated parameters 30.10-36.68% of DM of Hungarian vetch and wheat mixtures or milk stage of wheat seemed to be the best harvesting stage for forage.