14个多花黑麦草品种(系)在川西南地区生产性能综合评价

通过田间试验对14个多花黑麦草品种(系)在川西南区的生产性能进行比较研究。结果表明,新品系YA03和YA08的冬季生长速度相对较快,与剑宝、阿伯德差异显著(P<0.05),具有明显的冬季生长优势。产草量方面,新品系YA17表现最好,长江2号次之。而新品系YA03前3茬产量优势明显,2011-2013两年度平均干草产量可达12994 kg/hm²,比对照增产11.50%~15.66%;两年度平均鲜草产量为98973 kg/hm²,比对照增产9.47%~12.82%。茎叶比方面,阿伯德叶片含量最高(茎叶比为1∶1.86),其次为新品系YA03(茎叶比为1∶1.68)。而在物候期、营养成分等方面,各多花黑麦草品种(系)差异不显著。综合得知,新品系YA17和YA03具有产量较高,叶片含量丰富,较适合川西南区冬闲田稻草轮作。

The production performance of 14 annual ryegrass varieties in the southwest of Sichuan Province

The production performance of 14 varieties of annual ryegrass was studied in Ya’an in the southwest of Sichuan province. The growth rates of the new lines YA03 and YA08 were faster than Jumbo and Aubade. From 2011 to 2013, the yields of the new line YA17 were the highest, and YA03 also had advantages in yields from the first three cuts. The fresh yield of YA03 achieved 12994 kg/ha on average, 11.50% to 15.66% more than Changjiang No.2, Tetragold and Aubade. The hay yield was also greater by 9.47% to 12.82%, achieving 98973 kg/ha. In addition, Aubade and YA03 had very rich leaves. There were no significant differences of the phenology and the main nutrient contents among the 9 tested varieties. Therefore the new lines YA17 and YA03, with their higher yields and richer leaves, are more suitable for planting in the southwest of Sichuan province.