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硝酸钾对假俭草抗寒性和草绿期的影响
引用本文:袁学军,刘建秀,张婷婷,郭爱桂.硝酸钾对假俭草抗寒性和草绿期的影响[J].草地学报,2007,15(4):363-366,370.
作者姓名:袁学军  刘建秀  张婷婷  郭爱桂
作者单位:1. 南京农业大学生命科学院,江苏,南京,210095;江苏省中国科学院植物研究所,江苏,南京,210014
2. 江苏省中国科学院植物研究所,江苏,南京,210014
摘    要:用硝酸钾(0、2.5、5.0、7.5和10.0 g/L)对盆栽假俭草(Eremochloa ophiuroides(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  硝酸钾  假俭草  抗寒性  绿期  影响  Period  Green  Resistance  Chilling  Potassium  Nitrate  延长  效果  分解  相对电导率  照相  低温条件下  结果  研究  含量  脯胺酸
文章编号:1007-0435(2007)04-0363-05
收稿时间:2007-06-07
修稿时间:2007-06-072007-06-26

Effect of Potassium Nitrate on Chilling Resistance and Green Period of Eremochloa ophiuroides (Munro.) Hack
YUAN Xue-jun,LIU Jian-xiu,ZHANG Ting-ting,GUO Ai-gui.Effect of Potassium Nitrate on Chilling Resistance and Green Period of Eremochloa ophiuroides (Munro.) Hack[J].Acta Agrestia Sinica,2007,15(4):363-366,370.
Authors:YUAN Xue-jun  LIU Jian-xiu  ZHANG Ting-ting  GUO Ai-gui
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.
Keywords:Centipedegrass  Potassium nitrate  Chlorophyll  Soluble sugar  Proline  Relative electrical conductivity  Chilling resistance  Green stage
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