Acta Agrestia Sinica ›› 2007, Vol. 15 ›› Issue (4): 363-366.DOI: 10.11733/j.issn.1007-0435.2007.04.013

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Effect of Potassium Nitrate on Chilling Resistance and Green Period of Eremochloa ophiuroides(Munro.) Hack

YUAN Xue-jun1,2, LIU Jian-xiu2, ZHANG Ting-ting2, GUO Ai-gui2   

  1. 1. College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu Province 210095, China;
    2. Institute of Botany, Jiangsu Province & Chinese Academy of Sciences, Nanjing, Jiangsu Province 210014, China
  • Received:2007-06-07 Revised:2007-06-26 Online:2007-08-15 Published:2007-08-15

硝酸钾对假俭草抗寒性和草绿期的影响

袁学军1,2, 刘建秀2, 张婷婷2, 郭爱桂2   

  1. 1. 南京农业大学生命科学院, 江苏, 南京, 210095;
    2. 江苏省中国科学院植物研究所, 江苏, 南京, 210014
  • 通讯作者: 刘建秀,E-mail:turfunit@yahoo.com.cn
  • 作者简介:袁学军(1967- ),男,山东济宁人,副教授,博士研究生,研究方向为草坪草抗寒性的改良和调控,E-mail:yuanxuej@163.com

Abstract: The new selection E-126 of centipedegrass(Eremochloa ophiuroides(Munro.) Hack) was used to study the effect of KNO3(0,2.5,5.0,7.5,and 10.0 g/L) on the cold hardiness and green period of centipedegrass during the cold season.The results show:(1) under the KNO3 treatment,the relative electrical conductivity and chlorophyll decomposition of centipedegrass were reduced,whereas the content of soluble sugar and proline in centipedegrass leaves were obviously increased in comparison to the check,which indicated that the KNO3 could improve the cold hardiness and performance of centipedegrass during the cold season;(2) treatment of 7.5 g/L KNO3 resulted in the best performance and could prolong the green period by 12-13days compared with the check.

Key words: Centipedegrass, Potassium nitrate, Chlorophyll, Soluble sugar, Proline, Relative electrical conductivity, Chilling resistance, Green stage

摘要: 用硝酸钾(0、2.5、5.0、7.5和10.0 g/L)对盆栽假俭草(Eremochloao phiuroides(Munro.)Hack)优良品系E-126进行处理,通过测定叶中叶绿素、可溶性糖和脯胺酸的含量及相对电导率,研究其对假俭草抗寒性和绿期的影响,结果表明:在低温条件下,硝酸钾处理的假俭草与对照相比,不仅降低了电导率,提高了叶绿素的含量、抑制了叶绿素的分解,而且提高了可溶性糖、脯胺酸的含量,从而提高了抗寒性。其中效果最好的处理为7.5 g/L,可延长假俭草草绿期12~13 d。

关键词: 假俭草, 硝酸钾, 叶绿素, 可溶性糖, 脯氨酸, 电导率, 抗寒性, 青绿期

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