【摘要】 为筛选甘肃省兰州周边地区适宜种植的优质饲用高粱品种及最佳利用方式,在兰州市红古区开展了大马力918、大奖505、陇草1号和陇草2号4个供试品种的物候期观测、农艺性状比较及其在不同刈割次数下草产量的试验研究。结果表明:4个供试品种平均生育期121.3 d,大马力918生育期相对较长,为129 d;刈割一次时,大马力918各性状表现最佳,鲜草产量、干物质产量最高,分别为125.22 t/hm~2和39.19 t/hm~2;两次刈割时,各品种平均株高较刈割一次显著降低(P<0.05),有效分蘖数、全株叶片数及鲜干比均显著增加(P<0.05);大马力918两次刈割时鲜草产量较刈割一次显著降低(P<0.05),其他各品种均显著升高(P<0.05),刈割次数的增加对陇草1号干物质产量无显著影响(P>0.05)。综合分析认为,在当地特定的气候条件下,陇草1号适合多次刈割,而大马力918适合一次刈割。更多还原

【Abstract】 In order to clarify the suitable planting forage sorghum varieties and the best usage of Lanzhou surrounding areas,the experiment was conducted in Honggu county of Gansu province.Phenological period,agronomic characters and grass yield were measured in 4 different varieties.The result showed that average growth period of the four tested varieties was 121.3 d,the growth period of Damali 918 was 129 d,longer than others.When cut it once,all agronomic traits of Damali 918 showed the best performance,which had the highest yield of fresh grass and dry matter was 125.22 t/hm~2 and 39.19 t/hm~2,respectively.When cut it two times,among different varieties,the average plant height was markedly decrease,while the tiller number,leaf number and fresh/dry ratio were increased,significantly.The yield of fresh grass was decreased in Damali 918 but the other cultivars were increased,significantly.Meanwhile,the increase of cutting times had no effect on the dry matter yield of Longcao No.1.Based on the comprehensive analysis,under the local climatic conditions,Longcao No.1 is suitable for multiple cutting,while the Damali918 is suitable for cutting once.更多还原