赤霉素、激动素和吲哚丁酸合剂对滨海盐碱区粒用高粱耐盐性和产量的影响  

Effects of gibberellic acid, kinetin and indole butyric acid mixture on sorghum salinity tolerance and grain yield in saline-alkali coastal zone

作　　者：郭丽娜 卢霖[1] 董学瑞 张凤路[2] 闫鹏 董志强[1] GUO Lina;LU Lin;DONG Xuerui;ZHANG Fenglu;YAN Peng;DONG Zhiqiang(Institute of Crop Sciences,Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and Ecology,Ministry of Agriculure and Rural Affairs,Beijing 100081,China;College of Agronomy,Agricultural University of Hebei,Baoding 071001,Hebei,China)

机构地区：[1]中国农业科学院作物科学研究所/农业农村部作物生理生态重点实验室,北京100081 [2]河北农业大学农学院,河北保定071001

出　　处：《应用生态学报》2023年第9期2405-2412,共8页Chinese Journal of Applied Ecology

基　　金：国家重点研发计划项目(2020YFD1000801)资助。

摘　　要：滨海盐碱地开发利用对缓解我国耕地资源短缺、改善滨海盐碱区农业生态环境和保障国家粮食安全具有重要意义。本研究于2021、2022年分别在中国农业科学院作物科学研究所新乡基地和山东东营黄河三角洲现代农业研究基地设置盆栽试验和田间试验(随机区组设计),以济梁1号和济梁2号为试验材料,设置浓度为2.5和5 mL·kg^(-1)的GKI合剂拌种处理(主要成分为赤霉素、激动素和吲哚丁酸,分别用GKI2.5和GKI5.0表示),以清水拌种为对照(CK),分析GKI对粒用高粱耐盐性和产量的调控效应。结果表明:与CK相比,GKI2.5和GKI5.0拌种处理显著促进了盐碱胁迫下两个粒用高粱植株生长发育,提高了叶片抗氧化酶活性和可溶性蛋白含量,降低了叶片丙二醛含量,提高了叶片净光合速率,田间条件下,济梁1号和济梁2号产量分别增加了17.1%和19.1%。综上,GKI拌种处理促进了盐胁迫下高粱生长发育、增强了叶片抗氧化能力及渗透调节能力、降低了膜脂过氧化水平,提高了叶片净光合速率,进而提高了高粱耐盐性和产量。The development and utilization of coastal saline-alkali lands hold significant importance in mitigating the shortage of cultivated land resources in China,enhancing the agro-ecological environment in coastal saline and alkaline areas,and ensuring national food security.We set up both pot and field trials(randomized block design)at Xinxiang experimental station of Institute of Crop Science,Chinese Academy of Agricultural Sciences(ICSCAAS)and Dongying Yellow River Delta Modern Agricultural Research Base in Shandong Province in 2021 and 2022,respectively.The experimental materials,Jiliang 1 and Jiliang 2,underwent seed dressing with GKI composites at concentrations of 2.5 and 5 mL·kg^(-1).These composites,which contained the main components of gibberellin,kinetin,and indole butyric acid,were denoted as GKI2.5 and GKI5.0,respectively.The control plots(CK)received water seed dressing.The aim was to assess the regulatory effects of CKI on salt tolerance and grain sorghum yield.Compared to CK,the CKI2.5 and GKI5.0 seed dressing treatments significantly enhanced the growth and development of the two grain sorghum varieties,increased antioxidant enzyme activity and soluble protein content of sorghum leaves,while reducing leaf malondialdehyde content.Moreover,the GKI treatments increased leaf net photosynthetic rate.Under field conditions,yields of Jiliang 1 and Jiliang 2 were enhanced by an average of 17.1%and 19.1%,respectively.In conclusion,GKI seed dressing treatment effectively promoted the growth and development of sorghum under salt stress.It enhanced the antioxidant and osmoregulatory capacities of leaves,reduced the level of membrane lipid peroxidation,and improved net photosynthetic rate of leaves,which together improved the salt tolerance and sorghum yield.

关 键 词：盐胁迫 化学调控 高粱 耐盐性 产量 

分 类 号：S514[农业科学—作物学]