NaCl、水分复合胁迫下宁夏苜蓿幼苗对叶绿素含量的影响

运用二次通用旋转组合设计研究了宁夏10种主栽苜蓿品种苗期在NaCl、水分复合胁迫下体内叶绿素含量的变化,并对其抗盐、抗旱性进行了初步评价,结果表明:NaCl和水分胁迫效应对各品种体内叶绿素含量均表现为负效应,其单因素效应表现为:随NaCl胁迫的增加,各品种体内叶绿素含量均呈不同程度减少趋势,随水分胁迫的增加及加入水量的增加,各品种体内叶绿素均有不同量的增加.盐分和水分胁迫只有对CW200和阿尔冈金2个品种存在交互效应,对CW200为负交互,对阿尔冈金为正交互,且交互作用大小排序为阿尔冈金>CW200,对其余品种的交互效应不显著,以叶绿素含量为主要指标对10个苜蓿品种抗盐、抗旱性初步排序为:CW301>阿尔冈金>宁苜1号>朝阳苜蓿>金皇后> CW200 >内蒙苜蓿>陇东苜蓿>新疆大叶>三得利.

Chlorophyll Content Trends During Seedling Stage of Ten Staple Alfalfa Varieties in Ningxia with NaCl and Water Compound Stress

The experiment was conducted to study chlorophyll content trends during seedling stage and give tentative evaluation about their capability to resist water and NaCl stress of ten Staple Alfalfa varieties in Ningxia with NaCl and water compound stress by using quadratic general spinning design.The results showed determine effect of chlorophyll content variation for all Alfalfa varieties displayed negative effect,Single effect displayed chlorophyll content for all decreased with NaCl stress being serious,while increased in some extent with water stress being serious and enough water added.To interaction effect of Water and NaCl on chlorophyll content variation,only Algonguin with negative effect and CW200 with positive effect existed,others had effect insignificantly.Put in order tentatively according chlorophyll content from high to low to evaluate ten staple alfalfa varieties about their compound resistance to NaCl and water as follow:CW301>CW200>Zhaoyang>Golden Empress>Ningmu No1>Algonguin>Neimeng>Longdong>Sanditi>Xingjiang.