不同浓度NaHCO_(3)处理对香蕉叶片生理指标的影响  

Effects of NaHCO_(3)with Different Concentrations on Physiological Indexes of Banana Seedlings

作　　者：梁晋豪 刘涛[1] 邓祥平 刘德兵[3] 魏军亚[4] LIANG Jinhao;LIU Tao;DENG Xiangping;LIU Debing;WEI Junya(College of Forestry,Hainan University,Danzhou 571737,Hainan;Danzhou Academy of Agriculture and Forestry Sciences,Danzhou 571799,Hainan;Hainan University,Danzhou 571737,Hainan;Tropical Crops Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences,Danzhou 571737,Hainan)

机构地区：[1]海南大学林学院,海南儋州571737 [2]儋州市农林科学院,海南儋州571799 [3]海南大学应用科技学院,海南儋州571737 [4]中国热带农业科学院热带作物品种资源研究所,海南海口571101

出　　处：《中国热带农业》2023年第3期61-68,共8页China Tropical Agriculture

基　　金：海南省自然科学基金项目;海南省科技项目(ZDYF2022XDNY196,ZDYF2023XDNY068)。

摘　　要：以巴西蕉幼苗为试验材料,分析不同浓度NaHCO_(3)对香蕉幼苗叶片生理指标的影响,探究香蕉幼苗的耐碱性盐特性。以胁迫处理20d后的相对株高生长量为因变量(Y)、以NaHCO_(3)浓度为自变量(X)建立回归曲线方程,相对株高生长量下降50%时所对应的盐浓度即为巴西蕉幼苗对胁迫的耐受阈值,确定其耐盐阈值为89.3mmol·L^(-1)。结果表明,巴西蕉幼苗对碱性盐胁迫有一定的耐受性,高浓度碱性盐胁迫下幼苗无法正常生长,为后续探索香蕉幼苗耐盐机制提供理论依据。Using Baxi banana seedlings as experimental materials,the effects of different concentrations of NaHCO_(3)on the growth and physiological indexes of Baxi banana seedlings were studied,in order to explore the alkaline salt tolerance characteristics of banana seedlings.The regression curve equation was established with the relative plant height growth after 20 days of stress treatment as the dependent variable(Y)and the concentration of NaHCO_(3)as the independent variable(X).When the relative plant height growth decreased by 50%,the corresponding salt concentration was the stress tolerance threshold of Baxi banana seedlings,and the salt tolerance threshold was determined to be 89.3 mmol·L^(-1).These results indicated that Baxi banana seedlings had a certain tolerance to alkaline salt stress,and the seedlings could not grow normally under high concentration of alkaline salt stress,providing a theoretical basis for understanding the salt tolerance mechanism of subsequent banana seedlings.

关 键 词：巴西蕉幼苗 碱性盐胁迫 生理响应 叶绿素 

分 类 号：S668.1[农业科学—果树学]