草地学报

›› 2012, Vol. 20 ›› Issue (1): 70-75.DOI: 10.11733/j.issn.1007-0435.2012.01.012

• 研究论文 • 上一篇    下一篇

4种禾草种子发芽条件的筛选研究

沈洋1, 刘芳2, 李青丰1, 苏红田2, 张义2   

  1. 1. 内蒙古农业大学, 内蒙古呼和浩特010000;
    2. 全国畜牧总站, 北京100125
  • 收稿日期:2011-09-13 修回日期:2011-11-07 出版日期:2012-02-15 发布日期:2012-07-06
  • 作者简介:沈洋(1988- ),女,内蒙占乌兰察布人,硕士研究生,研究方向为牧草种子生理生化,E-mail:yayumomo@163.com
  • 基金资助:
    公益性行业(农业)科研专项“草原虫害监测预警及防控技术研究与示范”(201003079)资助

Seed Germination Conditions of Four Grass Forages Species

SHEN Yanga1, LIU Fanga2, LI Qing-feng1, SU Hong-tian2, ZHANG Yi2   

  1. 1. Inner Mongolia Agriculture University, Hohhot, Inner Mongolia 01000, China;
    2. National Animal Husdandry Service, Beijing 100125, China
  • Received:2011-09-13 Revised:2011-11-07 Online:2012-02-15 Published:2012-07-06

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摘要： 针对马唐(Digitaria sanguinalis(L.)Scop)、止血马唐(Digitaria ischaemum(Schreib.)Schreib.)、细弱隐子草(Cleistogenes gracilis Keng)和糙隐子草(Cleistogenes squarrosa(Trin.)Keng)4种禾本科牧草种子发芽率低的现象,使用不同温度、不同浓度KNO3溶液和预冷等处理对其进行打破休眠和促进萌发的研究,并对供试种子的适宜发芽条件进行筛选。结果表明:马唐种子不存在休眠问题,预冷和KNO3溶液对促进其萌发均没有显著效果;止血马唐种子存在休眠且生活力偏低,预冷能够打破休眠,KNO3处理能够有效提高其种子的生活力(P<0.05);细弱隐子草和糙隐子草发芽率低主要原因是种子生活力低,KNO3处理能够极显著提高种子的生活力和发芽率(P<0.01)。4种种子的最适发芽条件分别是:马唐种子用KNO3(0.2%)处理或不处理,在30℃恒温发芽;止血马唐、细弱隐子草和糙隐子草种子均为用KNO3(0.2%)处理并预冷(7d)后20～30℃变温发芽。

关键词: 马唐, 隐子草, 种子, 发芽条件

Abstract: Different methods(temperatures,KNO3 solutions and pre-cooling treatments)were investigated to break the dormancy and promote seed germination of: Digitaria sanguinalis(L.)Scop,Digitaria ischaemum(Schreib.) Schreib,Cleistogenes gracilis Keng and Cleistogenes squarrosa(Trin.) Keng.Results indicated that Digitaria sanguinalis seeds had no dormancy and both pre-cooling and KNO3 solution did not significantly promote germination.Digitaria ischaemum seeds had both dormancy and low-viability;pre-cooling treatment could break the dormancy effectively and KNO3 solution could effectively improve viability.The low seed germination percentage of Cleistogenes gracilis and Cleistogenes squarrosa was enhanced with a KNO3 solution improving both seed viability and seed germination percentage.Optimum seed germination conditions were: Digitaria sanguinalis seed germinated at 30℃ with or without KNO3(0.2%)solution treatment;Digilaria lschaemum,Cleistogenes gracilis and Cleistogenes spuarrosa seeds germinated at 20~30℃ with KNO3(0.2%)solution and pre-cooling treatment(7 d).

Key words: Digitaria, Cleistogenes, Seeds, Conditions of germination

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