草业学报2013，Vol.22Issue(3)：162-168,7.DOI:10.11686/cyxb20130321
盐胁迫下磷素对沟叶结缕草生长及Na+和K+含量的影响
Effect of phosphorus on Na+ and K+ concentrations and the growth of Zoysia matrella under salt stress
摘要
Abstract
The effect of phosphorus (0,1,5 and 20 mmol/L) on biomass and ion regulation was investigated using Zoysia matrella under salt stress (300 mmol/L NaCl) in hydroponic solution.Both phosphorus deficiency and salinity retardation of plant growth were more severe under P deficiency than under salt stress.With or without salt stress,phosphorous promoted the growth of Z.matrella,but too high a P concentration (20 mmol/L) led to growth inhibition.P addition within reasonable amounts promoted root growth and tended to increase leaf Na+ secretion but inhibit Na+ transport from root to leaf.It also restricted leaf Na+ accumulation and increased leaf K+ accumulation,leading to a decrease in leaf Na+/K+.All of these factors together help improve salt tolerance.关键词
沟叶结缕草/磷素/抗盐性/生长/离子调控Key words
Zoysia matrella/ phosphorous/ salt tolerance/ growth/ ion regulation分类
农业科技引用本文复制引用
蒋乔峰,陈静波,宗俊勤,李珊,褚晓晴,郭海林,刘建秀..盐胁迫下磷素对沟叶结缕草生长及Na+和K+含量的影响[J].草业学报,2013,22(3):162-168,7.基金项目
国家科技支撑计划项目(2011BAD13B09,2012BAB03B04)和江苏省农业科技支撑项目(BE2010309)资助. （2011BAD13B09,2012BAB03B04）
