Seed Germination Conditions of Four Grass Forages Species

doi:10.11733/j.issn.1007-0435.2012.01.012

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

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Seed Germination Conditions of Four Grass Forages Species

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

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

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. 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

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

Abstract

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

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

CLC Number:

Q945.35

SHEN Yanga, LIU Fanga, LI Qing-feng, SU Hong-tian, ZHANG Yi. Seed Germination Conditions of Four Grass Forages Species[J]. , 2012, 20(1): 70-75.

沈洋, 刘芳, 李青丰, 苏红田, 张义. 4种禾草种子发芽条件的筛选研究[J]. , 2012, 20(1): 70-75.

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Seed Germination Conditions of Four Grass Forages Species

4种禾草种子发芽条件的筛选研究

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