硅对复合碱式盐胁迫下黑麦草生长及光合作用的影响  

Effect of Silicon on Ryegrass Growth and Photosynthesis Under Composite Subsalt Stress

作　　者：薛巨坤[1] 李继光[1] 靳亚忠[2] 陈丹凤[3] 孙慧[4] 纪春艳[1] 

机构地区：[1]牡丹江师范学院生命科学与技术学院,黑龙江牡丹江157012 [2]黑龙江八一农垦大学农学院,黑龙江大庆163319 [3]牡丹江医学院附属第二医院,黑龙江牡丹江157009 [4]牡丹江大学土木工程学院,黑龙江牡丹江157011

出　　处：《北方园艺》2013年第14期88-91,共4页Northern Horticulture

基　　金：黑龙江省教育厅科学技术研究面上资助项目(11551517);黑龙江省教育厅科学技术研究面上资助项目(11551516);牡丹江师范学院青年学术骨干资助项目(G200901);牡丹江市科技局科技攻关资助项目(G200920065)

摘　　要：以多年生黑麦草品种‘Ascend’为试材,采用基质培的方法,研究了硅对复合碱式盐NaHCO3∶Na2CO3(1∶1)胁迫下黑麦草生长和光合作用的影响。结果表明:浓度为0.6%的NaHCO3∶Na2CO3(1∶1)复合碱式盐胁迫下,硅处理有效促进了黑麦草的生长,减缓了叶绿素a的降低幅度,提高了叶绿素b和总叶绿素的含量,缓解了碱式盐胁迫对黑麦草叶片净光合速率的抑制,减缓了气孔导度、蒸腾速率、气孔限制值和水分利用率的降低,缓解了碱式盐胁迫对叶片光合作用的影响,但是硅缓解复合碱式盐NaHCO3与Na2CO3对黑麦草的胁迫存在一定的浓度范围。Taking ryegrass ＇Ascend＇ as test material,through soilless culture,the effect of silicon on ryegrass growth and photosynthesis were studied under the stress of composite subsalt NaHCOaand Na2CO3 （1 ： 1）. The results showed that under the stress of NaI-ICO3and Na2CO3 （1 ： 1） with 0. 6% concentration,silicon treatment effectively promoted ryegrass growth,slowed down the decline in Chlorophyll a, increased the content of both Chlorophyll b and total chlorophyll, mitigated the inhibition of ryegrass leaf net photosynthetic rate, slowed the reduction in stomatal conductance, transpiration rate;stomata limitation and water using efficiency,and alleviated the influence of composite subsalt stress on leaf photosynthesis. However,it was within a certain concentration range that ryegrass became under the stress of silicon alleviated composite subsalt NaHCO3andi Na2CO3.

关 键 词：硅 碱式盐胁迫 生长 光合作用 

分 类 号：X53[环境科学与工程—环境工程]