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中国农学通报

中国农学通报 ›› 2024, Vol. 40 ›› Issue (6): 29-35.doi: 10.11924/j.issn.1000-6850.casb2023-0238

• 农学·农业基础科学 • 上一篇    下一篇

烯效唑对扁穗雀麦生长发育和种子产量品质的影响

田宏(), 陆姣云, 张鹤山, 熊军波, 刘洋()   

  1. 湖北省农业科学院畜牧兽医研究所/湖北省动物胚胎工程及分子育种重点实验室，武汉 430064
  • 收稿日期:2023-03-22 修回日期:2023-07-29 出版日期:2024-02-22 发布日期:2024-02-22
  • 通讯作者:
    刘洋，男，1971年出生，湖北新洲人，研究员，硕士，主要从事草种资源保护和开发利用。E-mail：。
  • 作者简介:

    田宏，女，1978年出生，陕西周至人，副研究员，硕士，研究方向：草种质资源评价鉴定和新品种培育。通信地址：430064 湖北省武汉市洪山区南湖瑶苑特1号 湖北省农业科学院畜牧兽医研究所，E-mail：。

  • 基金资助:
    国家自然科学基金项目“扁穗雀麦种子发育及脱落机制研究”(31702170); 湖北省农业科技创新中心项目“饲草资源培育及高值化利用”(2021-620-000-001-021)

Effect of Uniconazole on Growth, Seed Yield and Quality of Prairie Grass

TIAN Hong(), LU Jiaoyun, ZHANG Heshan, XIONG Junbo, LIU Yang()   

  1. Institute of Poultry and Veterinarian, Hubei Academy of Agricultural Sciences/ Key Laboratory for Animal Embryo Engineering and Molecular Breeding of Hubei Province, Wuhan 430064
  • Received:2023-03-22 Revised:2023-07-29 Published-:2024-02-22 Online:2024-02-22

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摘要：

探究烯效唑对扁穗雀麦生长发育和种子产量品质的影响，为其种子增产提质提供科学依据。以‘江夏’扁穗雀麦为试验材料，采取随机区组设计，在拔节期喷施不同浓度烯效唑(0、50、90、130 mg/kg)，研究植株生长、种子产量和萌发特性。结果表明：烯效唑降低了植株高度，提高了抗倒伏能力。除50 mg/kg的烯效唑对生殖枝数有显著增加外(P<0.05)，其余处理对植株第二节长、茎粗、分蘖数和生殖枝数影响差异不显著。喷施不同浓度烯效唑，扁穗雀麦的小穗数/生殖枝、种子数和种子产量均表现为增加，但只有50 mg/kg处理下各指标差异达显著水平(P<0.05)。90 mg/kg烯效唑处理可显著增加扁穗雀麦种子活力指数(P<0.05)，但所有处理对千粒重、发芽率和发芽指数影响较小。各指标相关性分析发现，植株高度与倒伏率、分蘖数和生殖枝数极显著正相关(P<0.01)；种子产量和生殖枝数显著正相关(P<0.05)。喷施50 mg/kg烯效唑，扁穗雀麦种子产量最高，达1508.31 kg/hm2，较对照增加13.63%，差异显著(P<0.05)。

关键词: 扁穗雀麦, 烯效唑, 农艺性状, 种子产量, 萌发特性

Abstract:

The effect of uniconazole on plant growth, seed yield and quality of prairie grass was explored in order to provide a scientific basis for the seed yield and quality improvement. The plant growth, seed yield and germination characteristics of prairie grass ‘Jiangxia’ were studied by spraying different concentrations of uniconazole (0 mg/kg, 50 mg/kg, 90 mg/kg and 130 mg/kg) at jointing stage in a random block design. The results showed that uniconazole reduced plant height and increased lodging resistance. Except that 50 mg/kg uniconazole significantly increased the reproductive branch number (P<0.05), other treatments had no significant effects on the second stem node length, stem diameter, tiller number of plants and reproductive branch number. The spikelet number/reproductive branch, seed number and yield of prairie grass were increased by spraying different concentrations of uniconazole, but the difference of the all indexes was significant only under 50 mg/kg treatment (P<0.05). 90 mg/kg uniconazole treatment significantly increased seed vigor index (P<0.05), but all treatments had little effect on 1000-seed weight, germination rate and germination index. Correlation analysis showed that plant height was positively correlated with lodging rate, tillers number and reproductive branch number (P<0.01). And seed yield was positively correlated with reproductive branch number (P<0.05). The highest seed yield of prairie grass was 1508.31 kg/hm2 when 50 mg/kg uniconazole was sprayed, which was 13.63% higher than that of the control and the difference was significant (P<0.05).

Key words: prairie grass, uniconazole, agronomic traits, seed yield, germination characteristics