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草业学报 ›› 2021, Vol. 30 ›› Issue (5): 174-185.DOI: 10.11686/cyxb2020447

• 研究论文 • 上一篇    下一篇

12个多花黑麦草品种(系)在成都平原的生产性能和营养价值综合评价

肖逸(), 杨忠富, 聂刚, 韩佳婷, 帅杨, 张新全()   

  1. 四川农业大学草业科学系,四川 成都 611130
  • 收稿日期:2020-10-13 修回日期:2020-11-26 出版日期:2021-05-20 发布日期:2021-04-16
  • 通讯作者: 张新全
  • 作者简介:Corresponding author. E-mail: zhangxq@sicau.edu.cn
    肖逸(1995-),男,四川内江人,在读硕士。E-mail: 2542263492@qq.com
  • 基金资助:
    国家现代牧草产业技术体系(CARS-34);科技部南方草地牧草资源项目(2017FY100602);四川省饲草育种攻关(2016NZ0098-11)

Multi-trait evaluation of yield and nutritive value of 12 Lolium multiflorum varieties or lines in Chengdu Plain

Yi XIAO(), Zhong-fu YANG, Gang NIE, Jia-ting HAN, Yang SHUAI, Xin-quan ZHANG()   

  1. Department of Grassland Science,Sichuan Agricultural University,Chengdu 611130,China
  • Received:2020-10-13 Revised:2020-11-26 Online:2021-05-20 Published:2021-04-16
  • Contact: Xin-quan ZHANG

摘要:

为筛选适宜在成都平原地区种植的多花黑麦草品种(系),本研究通过田间试验测定了12个多花黑麦草品种(系)的生长速度、茎叶比、刈割高度、干草产量、鲜草产量等生产性能指标,并利用近红外光谱(NIRS)技术对不同刈割时期的4个营养成分动态进行测定分析。结果表明,参试多花黑麦草在3~4月生长速度最快,日均生长速度达2.05~2.18 cm,而此时茎所占比例较大,鲜草茎叶比为1.02~1.14,干草茎叶比为0.71~1.00。各参试多花黑麦草品种(系)鲜草产量达93444~109660 kg·hm-2,干草产量为13191~15099 kg·hm-2,其中新品系JG1和DC2两年平均干草产量最高,分别为15099和14846 kg·hm-2,较对照杰威增产14.5%和12.5%。安第斯的粗蛋白含量达18.44%,显著高于其他品种(P<0.05);新品系JG1的中性洗涤纤维和酸性洗涤纤维均为最低,分别为26.09%和53.43%;川农1号的可溶性碳水化合物含量最高,达21.67%。应用灰色关联度法对12个多花黑麦草品种的产量和营养品质相关指标进行综合分析,结果显示新品系DC2、JG1、CA1和GB性状综合表现较好,可进一步试验以在成都平原推广利用。

关键词: 多花黑麦草, 生产性能, 近红外光谱, 营养品质, 灰色关联度

Abstract:

This research evaluated the growth rate (measured as rate of height increase), stem∶leaf ratio, mowing height, fresh yield, hay yield and other production performance indexes of 12 Italian ryegrass varieties (lines) in order to select and breed new lines of Italian ryegrass suitable for cultivation in Chengdu, Southern China. Concurrently, herbage nutritional quality at different mowing stages was measured by near infrared spectroscopy (NIRS). It was found that the tested Italian ryegrass varieties (lines) grew rapidly (2.05 to 2.18 cm?d-1) during March and April. However, the stem∶leaf ratio was comparatively high, ranging from 1.02∶1 to 1.14∶1 for fresh weight and from 0.71∶1 to 1.00∶1 for dry weight. The fresh yield of the tested varieties (lines) ranged from 93444 to 109660 kg·ha-1, and the hay yield from 13191 to 15099 kg·ha-1. Among the tested lines, the average hay yield of the new lines JG1 and DC2 was 15099 and 14846 kg·ha-1, and these values exceeded yield of the control variety Angus No.1 by 14.5% and 12.5%, respectively. The crude protein content of Andes (18.44%) was significantly higher than other varieties (lines) (P<0.05). The acid detergent fiber and neutral detergent fiber contents of the new line JG1 were the lowest at 26.09% and 53.43%, respectively, and the water soluble carbohydrate content of Chuannong No.1 was the highest at 21.67%. Ten indices related to forage yield and quality were utilized to evaluate the tested Italian ryegrass varieties (lines) via grey correlation analysis, which showed that DC2, JG1, CA1 and GB performed excellently in Chengdu Plain and could be further tested for promotion and utilization.

Key words: Italian ryegrass, production performance, near infrared reflectance spectroscopy, nutritional quality, grey relational analysis