根际促生菌对盐分胁迫下玉米生长的影响  

Effects of Rhizosphere Plant Growth Promoting Bacteria on Maize Growth Under Salt Stress

作　　者：唐古藞山 李昂 周文林 吴婷婷 侯爽 侯亚玲 曾文治[1,2] TANG Gu-la-shan;LI Ang;ZHOU Wen-lin;WU Ting-ting;HOU Shuang;HOU Ya-lin;ZENG Wen-zhi(School of Water Resources and Hydropower,Wuhan University,Wuhan 430072,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学水利水电学院,武汉430072 [2]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《节水灌溉》2023年第2期121-127,共7页Water Saving Irrigation

基　　金：国家自然科学基金项目(51879196)。

摘　　要：通过室内盆栽试验,设置了4组不同盐分处理(1.7、2.5、3.8、5.9 dS/m,记为S1、S2、S3、S4),2种根际促生菌处理[枯草芽孢杆菌bacillus subtilis(BS)和巨大芽孢杆菌bacillus megaterium(BM)]以及对照组(CK,不添加根际促生菌),研究不同盐分胁迫下根际促生菌在对玉米生长特性的影响。结果表明:在4种盐分处理下(S1、S2、S3、S4),根际促生菌BS能够使拔节期玉米株高分别增加8.63%、8.10%、7.01%和5.04%,使玉米平均鲜重分别增加4.46%、22.10%、24.09%、6.84%,对叶面积指数无显著规律影响,使根系Na^(+)/K^(+)分别降低7.00%、6.90%、5.14%、8.25%,对玉米叶片电解质渗透率并无规律性的显著影响。根际促生菌BM能够使拔节期玉米株高分别增加11.10%、0.54%、12.77%和2.59%,使玉米鲜重增加11.76%、16.85%、10.58%和7.03%,对叶面积指数无显著规律影响,使玉米根系Na^(+)/K^(+)分别降低11.00%、4.09%、17.07%、4.17%,对玉米叶片电解质渗透率并无规律性的显著影响。因此,添加根际促生菌能够促进盐分胁迫下玉米的生长,提高玉米的耐盐能力。In this study,four different salt treatments(1.7,2.5,3.8,5.9 dS/m,denoted as S1,S2,S3,S4),two rhizosphere plant growthpromoting bacteria(PGPR)treatments named bacillus subtilis(BS)and bacillus megaterium(BM),and control group(CK,without rhizosphere growth-promoting bacteria)were used to study the effects of rhizosphere PGPR on the growth characteristics of maize under different salt stress.The results showed that under the four salt treatments(S1,S2,S3,and S4),the rhizosphere PGPR of BS could increase the plant height of maize by 8.63%,8.10%,7.01%,and 5.04%,and the average fresh weight of maize by 4.46%,22.10%,24.09%,and 6.84%,respectively,at jointing stage.The root Na^(+)/K^(+)was reduced by 7.00%,6.90%,5.14%,8.25%,respectively.The electrolyte permeability of maize leaves was not affected regularly.The rhizosphere PGPR of BM could increase maize plant height by 11.10%,0.54%,12.77%,and 2.59%,and fresh weight by 11.76%,16.85%,10.58%,and 7.03% at the jointing stage,respectively,but had no significant effect on leaf area index.The reduction of Na^(+)/K^(+)in the maize root system was 11.00%,4.09%,17.07%,and 4.17%,respectively,and there was no significant regular effect on the electrolyte permeability of maize leaves.Therefore,adding rhizosphere PGPR could promote the growth of maize under salt stress and improve the salt tolerance of maize.

关 键 词：根际促生菌 枯草芽孢杆菌 巨大芽孢杆菌 盐分胁迫 玉米 生长指标 

分 类 号：S144[农业科学—肥料学]