硅对盐胁迫下黄瓜生长及矿质营养的影响  

Effects of Silicon on Growth and Mineral Nutrient Contents of Cucumber under Salt Stress

作　　者：姚秋菊[1] 张晓伟[1] 蒋武生[1] 吕中伟[1] 化青报[2] 褚伟[2] 

机构地区：[1]河南省农业科学院园艺研究所,河南郑州450002 [2]河南农业大学,河南郑州450002

出　　处：《河南农业大学学报》2008年第2期170-175,共6页Journal of Henan Agricultural University

基　　金：国家自然科学基金重点项目(30230250)

摘　　要：采用水培法,研究了硅(Si)对盐胁迫下耐盐性不同的2个黄瓜品种(津绿4号和津研4号)地上部及根系中N,P,Ca^(2+),K^+,Na^+,Mg^(2+),Mn^(2+),Zn^(2+),Si,Cl^-等矿质元素含量的影响.结果表明,津绿4号和津研4号经50 mmol.L^(-1)NaCl处理5,10 d后,地上部和根系中Ca^(2+),K^+,Zn^(2+)含量明显下降,Na^-,Cl^-,Mn^(2+)含量显著高于CK.Si可显著提高盐胁迫下黄瓜地上部和根系中Ca^(2+),K^+,Zn^(2+)含量,并降低Na^+,Cl^-,Mn^(2+)含量,Si可提高盐胁迫下黄瓜植株的干物质量和相对含水量,显著改善了盐胁迫下黄瓜植株的养分平衡状况.耐盐性不同的2个黄瓜品种,地上部和根系中元素含量变化无明显差异.Two cucumber cultivars were grown in a hydroponics culture system for the investigations of silicon（Si）on growth and mineral nutrient contents in seedling shoots and roots under salt stress. The results showed that the content of calcium ion （ Ca^2＋ ） , potassium ion （ K^＋ ） and zinc ion （Zn^2＋ ） were significantly reduced by salt stress in cucumber seedling shoots and roots, while sodium ion （ Na^＋ ） , chloride ion （ Cl^- ） and manganese ion （ Mn^2＋） increased. Addition of Si increased Ca^2＋ , K^＋ and Zn^2＋ content, but decreased Na^＋ , Cl^- and Mn^2＋ content. Additionally, it was found that the addition of Si increased cucumber dry matter and relative water content and improved the nutrient balance of salt-stressed cucumber. There were no significant differences in the changes of mineral nutrient concentration in shoots and roots of both cultivars after exposed to NaCl.

关 键 词：黄瓜 硅 盐胁迫 生长 矿质营养 

分 类 号：S642.2[农业科学—蔬菜学]