海盐胁迫对海滨雀稗生长及植株体内阳离子含量的影响  

Effect of sea-salt stress on the growth and ion contents of Paspalum vaginatum

作　　者：邹轶[1,2] 顾洪如[2] 钟小仙[2] 丁成龙[2] 沈益新[1] 

机构地区：[1]南京农业大学动物科技学院,江苏南京210095 [2]江苏省农业科学院畜牧研究所,江苏南京210014

出　　处：《草业科学》2009年第4期117-120,共4页Pratacultural Science

基　　金：慈溪市农业社会发展科技计划"海雀稗耐盐性及草地建植关键技术研究与应用"(CR200723);宁波市科技计划项目"海雀稗耐盐性及草地建植关键技术研究与开发"(2008C10033)

摘　　要：将0、6.8、13.6、20.4、27.2和34g/L的海盐同1/2 Hoagland营养液混合用作灌溉处理,研究海盐胁迫对海滨雀稗Paspalum vaginatum生长及植株体内Na+、K+、Ca+、Mg+含量的影响。结果表明,海滨雀稗生长受海盐处理抑制,其抑制程度随海盐质量浓度的增加而加大。茎和叶中Na+含量随海盐质量浓度增高而升高,在海盐质量浓度34g/L时,分别为23.35和22.27mg/g;根中Na+含量在海盐质量浓度为6.8g/L时与对照差异不显著,其他处理均显著高于对照和6.8g/L的处理。叶中K+含量不随海盐胁迫而变化,维持在25mg/g左右;茎中K+含量随海盐质量浓度增加逐渐降低,根的K+含量在20.4g/L达到最大值6.4mg/g,在34g/L时反而降低,但高于对照。海滨雀稗耐盐的原因之一可能是叶片中K+含量稳定。Growth response and contents of Na^＋ , K^＋ , Ca^2＋ and Mg^2＋ of seashore paspalum （Paspalum vaginatum） were studied by treating it with 1/2 Hoagland solution containing sea-salt with concentrations of 0, 6.8, 13.6, 20.4,27.2 and 34 g/L. The results showed that the growth of seashore paspalum was inhibited by sea-salt stress, and the inhibiting was stronger along with the increasing of sea-salt concentration. The content of Na^＋ in leaf and stem increased with the increasing of sea-salt concentration, while the sea-salt concentration was 34 g/L, the content of Na^＋ in leaf and stem were 23.35 mg/g and 22. 27 mg/g. While the sea-salt concentration was 6.8 g/L, the content of Na^＋ in root was no significant different with CK, but it was significant higher than CK in the other treatments. The content of K^＋ in leaf kept at 25 mg/g and did not change with increased sea-salt concentration. The content of K^＋ in stem was decreased gradually with the increased sea-salt concentration. The maximum content of K^＋ in root was 6.4 mg/g at 20.4 g/L of sea-salt concentration; it decreased at 34 g/L but higher than CK. The stable content of K^＋ in leaf might be one of reasons for the strong tolerance of seashore paspalum.

关 键 词：海盐 海滨雀稗 NA^+ K^+ 

分 类 号：S688.4[农业科学—观赏园艺]