The results showed that the contents of CP,Ash declined gradually with the growth stage,on the contrary,the content of NDF increased.

• 结果表明:(1)牧草随着生育期的延续,植株变老,粗蛋白质(CP)和粗灰分(Ash)含量逐渐降低,而中性洗涤纤维(NDF)则呈相反的趋势。