林业科学Issue(9)：18-23,6.DOI:10.11707/j.1001-7488.20150903
盐碱胁迫下金叶接骨木根系K含量模型构建﹡
Establishment of The Estimation Model of K Content of Sambucus canadensis Root under Saline-Alkali Stress
摘要
Abstract
Objective]Sambucus canadensis was used as experimental material in this study. To simply and fastly predict K content in roots of Sambucus canadensis under salinity and alkalinity stress,salinity and alkalinity resistance of this plant roots was measured by electrical impedance spectroscopy ( EIS ) and electrolyte permeability methods and the estimation model of K Content of their roots was establish. [Method]The electrical impedance spectroscopy, cell membrane permeability and the change of K content in roots during different concentrations of salinity-alkalinity stress were studied. The corrections between EIS parameters and K content were analyzed using linear and nonlinear regressions. The estimation model was constructed using the best EIS parameter and the model accuracy was tested.[Result]During the salinity and alkalinity stress,compared with control,the K content of Sambucus canadensis roots treated by different concentrations of salinity-alkalinity significantly decreased(P≤0. 05). As the extension of salinity-alkalinity stress time, the relative conductivity of the roots under different stress tended to rise and significantly increased compared with control ( P≤0. 05 ) . The spectra of electrical impedance changed in roots of Sambucus canadensis during salinity-alkalinity stress;The EIS parameter τ was the best for assessing K content of root. The best model was y =0. 005 5x3 -0. 232 8x2 +2. 638 8x + 15. 877 with the precision accuracy of 91. 73%.[Conclusion]The model y =0. 005 5x3 -0. 232 8x2 +2. 638 8 x+ 15. 877 with best precision accuracy constructed with EIS parameter τ can be used to fastly and accurately forecast K content in roots of Sambucus canadensis under salinity and alkalinity stress.关键词
金叶接骨木/根系/盐碱胁迫/电阻抗图谱参数/K含量/相对电导率/模型构建Key words
Sambucus canadensis/root/saline-alkali stress/electrical impedance spectroscopy/K content/relative electrolytic leakage/model building分类
农业科技引用本文复制引用
石慧勤,张罗沙,邸葆,李保会,张芹..盐碱胁迫下金叶接骨木根系K含量模型构建﹡[J].林业科学,2015,(9):18-23,6.基金项目
国家星火计划项目(2012GA105005) （2012GA105005）
河北省林业厅项目(1404452)。 （1404452）
