N素营养对NaCl胁迫下盐地碱蓬幼苗生长及渗透调节物质变化的影响  

The effects of nitrogen on the growth and solutes of halophyte Suaeda salsa seedlings under the stress of NaCl

作　　者：段德玉[1] 刘小京[1] 李存桢[1] 乔海龙[1] 

机构地区：[1]中国科学院石家庄农业现代化研究所

出　　处：《草业学报》2005年第1期63-68,共6页Acta Prataculturae Sinica

基　　金：科技部中巴政府间合作项目--盐生植物持续利用技术研究(16 413);中科院石家庄农业现代化研究所知识创新方向性项目--微咸水安全高效利用技术研究(220761);河北省十五科技攻关项目--区域农业优势产业发展关键技术研究与示范(03220169D)。

摘　　要：通过NaCl和N对盐地碱蓬幼苗生长及渗透调节物质变化的影响研究,结果表明,NaCl和N素对植物的生长的影响是明显的(P<0.05),低NaCl胁迫下N含量的增加对盐地碱蓬幼苗生长的影响不明显,而高NaCl处理下增加营养液中N的含量能明显地缓解盐胁迫,促进盐地碱蓬幼苗的生长。叶片脯氨酸含量随着NaCl浓度和养分N含量的增加而增加,而可溶性糖含量减少。NaCl浓度的增加使得植株总离子含量、Na+含量增加,K+、Ca2+、Mg2+含量减少。随N养分含量的增加,叶中Na+和K+含量增加,Mg2+含量基本上呈减少的趋势。叶片中的Ca2+含量和植株根茎部各离子含量随养分N含量增加的变化规律不明显。The pretreated Suaeda salsa seedlings were transferred to Hoagland Suspension mixed with different concentration of NaCl and N. The result showed that the combined effect of NaCl and N on the seedlings is significant (P < (0.05)). N had little effect on seedlings growth in low salt stress. However, N can alleviate the stress and promote seedlings growth significantly in strong stress. With an increase of NaCl concentration and N content, proline content increased and soluable sugar content in leaves decreased. The total ion content and Na^+ content increased while K^+, Ca^(2+), and Mg^(2+)content decreased as NaCl increased. Na^+ and K^+ content in leaves increased with the increasing of N and basically Mg^(2+) content decreased. Ca^(2+)content in leaves and Na^+, K^+, Ca^(2+)and Mg^(2+) content in stem and root changed irregularly with the increasing of N content.

关 键 词：盐分胁迫 氮 营养液水培 渗透调节物质 盐地碱蓬 

分 类 号：Q945[生物学—植物学]