Zhongsi 237 was the best for hay at the density of 300 X 104/ha and b eing h arvested at anthesis.

• 用于青饲收获鲜草以饲草型品种OH 1 881密度为300万/ha的处理在开花期收获为佳，用于青贮收获干草以粮饲兼用型品种中饲237密度为300万/ha的处理在开花期收获为佳;