The hay yields of Polaris,Japan 03,Holand,Algonguin,Vernal and Sitel were less than 9?000 kg/hm~(2),Derby was the lowest among them(only 7?152.8 kg/hm~(2)).

• 产量低于9 000 kg/hm2的品种有北极星、日本03、荷兰、阿尔冈金、费纳尔和赛特；产量最低的品种是德宝；为7 152.；8 kg/hm2。