Prediction of forage yield and nutrition of three small grains in Jingtai oasis

To predict forage yield and nutritional quality of spring wheat(Triticum aestivum), oat(Avena sativa) and rye(Secale cereale), the field experiment was conducted in Jingtai oasis and hay yield. Plant height, tiller density, crude protein, crude fat, NDF, ADF, crude ash and water soluble carbohydrate were determined in 2010, then the relationships among these indicators were analyzed. Under condition of hay harvest of three crops, there were significant relationship among growth indicators (plant height, tiller density, hay yield) and five nutritional indicators (except soluble carbohydrates). Undersimulated grazing, there were no significant relationships between plant height and nutritional indicators for both spring wheat and rye, but there were significant relationships between tiller density and nutritional indices for oats and rye. In terms of the above, multi-variable regression equations were established to predict the nutritional quality on basis of tiller density and forage yield, which were considerably accurate while being compared with the observed values.