| The test adopted the split split plot design, had three factors, its were variety, density and clipping frequency. Clipping frequency had A1(clipping one time),A2(clipping two times), Hie density had B1(100000plants/hm2), B2(140000plants/hm2),the variety had Al (21A*sweet), A2(623A*sweet), A3(705A x sweet) and A4(sweet sorghum). The result of the test shows:100000plants/hm2of visible leaf, extended leaf growth were faster than140000plants/hm2,140000plants/hm2tillering number was more than100000plants/hm2. Hybrid of sweet sorghum visible leaf and extended leaf growfli were faster than sweet sorghum.100000plants/hm2grass yield was significantly less than140000plants/hm2, grass yield of clipping one time sweet sorghum was significantly lower than clipping two times’s, grass yield of705A×sweet was significantly higher than other varieties. |
