干旱区生态环境知识资源中心(Arid): 赤霉素与化学试剂提高羊草种子萌发率及活力的比较研究

Arid

	赤霉素与化学试剂提高羊草种子萌发率及活力的比较研究
其他题名	Comparative Study on Gibberellin and Chemical Reagent on Effect of Germination Rate and Vigor of Leymus chinensis
	刘美茹; 李金还; 牛建行; 王冉; 宋吉轩; 吕俊; 宗学凤; 王三根
来源期刊	西南农业学报
ISSN	1001-4829
出版年	2014
卷号	27 期号:6 页码:2687-2691
中文摘要	内蒙古地区典型草原退化较为严重,羊草(Leymus chinensis)是我国北方草原区优势种之一,具有重要的经济价值和生态价值。然而,通常状况下羊草种子的萌发率与活力均较低,为此,本文用多种方法对羊草种子萌发条件与活力提高的方法进行了比较研究。结果表明:适当浓度的赤霉素与化学试剂处理可提高羊草种子的发芽率和种子活力。其中300 mg / L的赤霉素浸泡种子24 h后羊草种子发芽率最高可以达到57. 8 %,发芽势为34. 43 %,活力指数为48. 66 %,分别比对照增长57. 6 %,122 %,134 %;化学试剂质量分数为2 %的KNO_3浸泡羊草种子48 h,其发芽率可以达到54. 43 %,发芽势为30. 00 %,活力指数为42. 40 %,分别比对照增长48. 4 %,93. 2 %,104 %。研究表明羊草种子发芽率低的原因可能是抑制剂与种皮的限制双重作用的结果。本研究可为规模化繁殖羊草,恢复草原生态环境,提高草原生产力提供重要参考价值。
英文摘要	In recent decades,severe degradation and desertification were found in Inner Mongolia due to intense human activities. Leymus chinensis is one of the dominant species of our country which has important economic and ecological value. However,Leymus chinensis seed germination rate and vigor are low. This article used a variety of methods of seed germination conditions to compare their germination index.The results showed that appropriate concentration of gibberellin (GA_3) and chemical reagent treatment could improve the germination rate and germination vigor. The concentration of 300 mg / L GA_3 soaking seeds 24 h could make the germination rate up to 57. 8 %,the germinative power up to 34. 43 % and vigor index up to 48. 66 % respectively,which increased with 57. 6 %,122 % and 134 % compared with the CK treatment. Chemical reagents of 2 % KNO_3 soaking seeds 48 h could make the germination rate,germinative power,vigor index up to 54. 43 %,30. 00 % and 42. 40 % respectively,which increased with 48. 4 %,93. 2 %,104 %,respectively compared with the CK treatment. The research indicated that the low germination rate may have relationship with the inhibitors and limits of seed coat. This study can provide important reference value to the propagation Leymus chinensis,grassland ecological environment and improving the grassland productivity.
中文关键词	羊草 ; 萌发 ; 赤霉素 ; 化学试剂
英文关键词	Leymus chinensis Germination Gibberellin Chemical reagent
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5326568
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231927
作者单位	西南大学农学与生物科技学院, 南方山地农业教育部工程研究中心, 重庆 400715, 中国
推荐引用方式 GB/T 7714	刘美茹,李金还,牛建行,等. 赤霉素与化学试剂提高羊草种子萌发率及活力的比较研究[J],2014,27(6):2687-2691.
APA	刘美茹.,李金还.,牛建行.,王冉.,宋吉轩.,...&王三根.(2014).赤霉素与化学试剂提高羊草种子萌发率及活力的比较研究.西南农业学报,27(6),2687-2691.
MLA	刘美茹,et al."赤霉素与化学试剂提高羊草种子萌发率及活力的比较研究".西南农业学报 27.6(2014):2687-2691.