作物研究2025，Vol.39Issue(2)：101-108,8.
外源钾对复合盐胁迫下棉花幼苗光合特性及根系的影响
Effects of Exogenous Potassium on Photosynthetic Characteristics and Root System of Cotton Seedlings under Compound Salt Stress
摘要
Abstract
In order to explore the cultivation measures of cotton under compound salt stress and provide a basis for cotton planting in saline-alkali soil,a pot experiment was carried out,using Cangmian 666 as material,and different degrees of compound salt stress(0,4,6 g/kg)and exogenous potassium fertilizer application amounts(0,40,80,120 and 200 mg/kg)were set up to compare and analyze the photosynthetic characteristics and root indicators of cotton seedlings under different treatments.The results showed that under compound salt stress,application of exogenous potassium could increase the SPAD value,net photosynthetic rate,fluorescence characteristic parameters,root length,root surface area and root volume of cotton to varying degrees.Under salt-free stress,when the exogenous potassium application amount was 80-120 mg/kg,the SPAD,net photosynthetic rate,fluorescence characteristic parameters,root characteristic parameters and biomass of the main stem and leaf of cotton seedlings performed better;under compound salt stress,the treatment applying 120-200 mg/kg exogenous potassium performed better,and both were significantly higher than that without potassium applica-tion.Comprehensive analysis shows that the application of exogenous potassium can alleviate the damage of cotton seedlings to salt stress to a certain extent and promote their photosynthesis and root growth.At the same time,with the intensification of compound salt stress,the demand for exogenous potassium will further increase.关键词
棉花/盐胁迫/钾/根系/光合特性Key words
cotton/salt stress/potassium/root morphology/photosynthetic characteristics分类
农业科学引用本文复制引用
徐婧,蒋建勋,曹平平,赵光辉,王安录,高凯悦,平文超,张忠波..外源钾对复合盐胁迫下棉花幼苗光合特性及根系的影响[J].作物研究,2025,39(2):101-108,8.基金项目
河北省科技支撑计划项目(16226307D-5) （16226307D-5）
河北省现代农业产业技术体系建设专项资金(HBCT2024100404) （HBCT2024100404）
河北省棉花现代种业科技创新团队(21326314D) （21326314D）
沧州市教育局项目(CZZJ2024140). （CZZJ2024140）
