Abstract: A study of the effect of different clipping frequencies and stubble height on the yield and quality of Sorghum sudanense Stapf. cv. Neinong No.1 indicated that: when clipping 3 times during the grass growing period, the crude protein yield was the highest (3.24 t/hm²). The green forage yield of two-time-clipping was the highest reaching 96.80 t/hm². Clipping only once ascended the hay yield to 35.04 t/hm², topping all. Leaving the stubble at an optimal height of 8 cm enhance the aftermath yield of green forage, hay, crude protein to 105.11 t/hm², 27.64 t/hm² and 3.29 t/hm² respectively. Stubble that was higher or lower that 8 cm hindered the speed of grass regrowth, the yield of forage and its content of crude protein.

Key words: Sorghum sudanense Stapf. cv. Ninong No.1, Clipping times, Stubble height, Yield, Quality

摘要： 研究刈割次数和留茬高度对内农1号苏丹草(Sorghum sudanense Stapf.cv.NeinongNo.1)产草量及品质的影响。结果表明:在生育期间,刈割3次粗蛋白质产量最高,达到3.24t/hm²;刈割2次鲜草产量最高(96.80t/hm²);刈割1次干草产量最高(35.04t/hm²);留茬以8cm为宜,鲜草、干草及粗蛋白质产量分别达105.11、27.64和3.29t/hm²,高于或低于8cm均影响其再生速度、产草量和粗蛋白质含量。

关键词: 内农1号苏丹草, 刈割次数, 留茬高度, 产草量, 品质