成都平原多花黑麦草品种VCU测试结果初报

Preliminary report on the results of VCU testing of Italian ryegrass varieties in Chengdu Plain

采用随机区组试验,连续2年,对已经审定登记的国审13个多花黑麦草(Lolium multiflorum Lam.)品种进行VCU测试.结果表明,13个多花黑麦草均能较好地适应成都平原,一般秋季播种,翌年成熟,生育天数228~238 d;不同年度,刈割次数不同,每次刈割产量对总产量的贡献不同;从2年的产量看,不同品种产量有差异,但总趋势一致,都是剑宝产量最高,年均干草产量为17.89 t·hm^(-2),较产量最低阿伯德增产26.38%;以长江2号为对照品种来看,第1个生产周期,有6个品种较对照增产,增产幅度为0.44%~13.82%;第2个生产周期,有5个品种较对照增产,增产幅度为2.78%~11.89%.不同品种多花黑麦草分蘖期粗蛋白、酸性洗涤纤维和中性洗涤纤维含量差异显著(P<0.05),其中邦德(H12)粗蛋白含量最高为22.33%,显著高于其他品种.

In order to compare the cultivation and utilization value of Italian ryegrass varieties registered in China,a randomized block trial was carried out for two consecutive years,VCU(Value for Cultivation and Use)tests were conducted on 13 national Italian ryegrass cultivars.The results showed that 13 varieties of Italian ryegrass could well adapt to the Chengdu Plain.They were sown in autumn,matured in the next year,and had 228~238 days of growth;The contribution of each cutting yield to the total yield varied with different year and cutting times;From the perspective of 2-year yield,there were differences in yield a-mong different varieties,but the overall trend was consistent.Jumbo had the highest yield,with an average hay yield of 17.89 t·hm^(-2),which was 26.38%higher than the lowest yield of Aubade;Taking Changjiang No.2 as the control variety,in the first production cycle,there were 6 varieties that increased in production compared to the control,with an increase rate of 0.44%~13.82%;In the second production cycle,5 varieties increased in production compared to the control,with an increase rate of 2.78%~11.89%.During the tillering stage,there were significant differences in crude protein,acidic washing fiber,and neutral washing fiber contents among different varieties of Italian ryegrass(P<0.05),the crude protein content of Abun-dant(H12)was 22.33%,which was significantly higher than that of other varieties.