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中国农学通报 ›› 2016, Vol. 32 ›› Issue (17): 7-11.doi: 10.11924/j.issn.1000-6850.casb16030202

• 畜牧 动物医学 蚕 蜂 • 上一篇    下一篇

刈割时间对苜蓿生殖生长及种子性状的影响

陈述明,王玉祥   

  1. 新疆农业大学草业与环境科学学院草业科学系,新疆农业大学草地资源与生态重点实验室
  • 收稿日期:2016-03-29 修回日期:2016-04-29 接受日期:2016-05-10 出版日期:2016-06-20 发布日期:2016-06-20
  • 通讯作者: 王玉祥
  • 基金资助:
    新疆维吾尔自治区科技支撑计划(201230116-4)、农业部公益性行业专项 (201403048-8)和共同资助。

Mowing Time Affecting Reproductive Growth and Seed Quality of Medicago sativa L.

  • Received:2016-03-29 Revised:2016-04-29 Accepted:2016-05-10 Online:2016-06-20 Published:2016-06-20

摘要: 试验以‘新牧4号’紫花苜蓿为材料,研究不同刈割时间对苜蓿生殖生长及种子特性的影响,以期为提高苜蓿种子产量提供基础数据。试验数据表明,刈割对苜蓿生殖格局、种子产量和种子特性等影响较大。其中,返青后第44(5月8日)、51天(5月15日)刈割,与对照相比,种子千粒重分别增加24.44%、30%,种子产量分别提高26.85%、45.86%,种子发芽率分别降低了2.12%、10.63%。刈割能够延迟苜蓿花期,通过改变苜蓿花期的外部环境和花的传粉效率来影响其结实特性。在苜蓿孕蕾至初花期间,适时刈割1次,能够提高花的传粉受精效率,降低生殖败育率,增加种子产量。

关键词: 政策工具, 政策工具, 罗非鱼, 产业政策, 分析评价

Abstract: To study the effect of mowing time on the reproductive growth and provide basic data for improving seed yield of alfalfa, Medicago sativa L.‘Xinmu No.4’was used as the experiment material. Alfalfa were mowed on the 30th, 37th, 44th, 51st, 58th and 65th day, namely on April 24, May 1, May 8, May 15, May 22 and May 29 in 2013, after resuming growth. Alfalfa in the control group was not mowed. The results showed that mowing time had important effect on reproductive pattern, seed yield and seed characteristics of alfalfa. Compared with the control group, 44 (May 8) and 51 (May 15) days after resuming growth, the thousand seed weight increased by 24.44% and 30%, seed yield increased by 26.85% and 45.86%, respectively. Whereas, seed germination rate reduced by 2.12% and 10.63%, respectively. Mowing could delay flowering period of alfalfa. Mowing once during flower bud formation period to early blooming period can improve the fertilization efficiency of flowers, decrease abortive reproductive rate and increase seed yield.