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实验以清水处理为对照,研究SNP、H2O2、SNP+H2O2处理对次生盐碱土壤和残余盐碱土壤中马铃薯形态特征、水势、渗透调节物质含量和K+、Na+选择性吸收的影响。结果表明:(1)土壤盐碱化使马铃薯植株生物量减少,水势下降,脯氨酸和可溶性糖累积,Na+/K+吸收失衡,w(Na+)/w(K+)和SNa+K+增大;SNP、H2O2、SNP+H2O2处理缓解了盐碱土壤对马铃薯形态和渗透调节的影响,其效果为SNP+H2O2>H2O2>SNP>清水;SNP、H2O2、SNP+H2O2处理诱导了两种盐碱土壤中w(Na+)/w(K+)和SNa+K+降低;(2)NO和H2O2对马铃薯耐盐碱性诱导具有加性效果。说明外源NO和H2O2可减轻盐碱土壤对马铃薯渗透调节功能和Na+/K+吸收影响,缓解盐碱土壤对马铃薯生长发育的抑制,增强马铃薯对盐碱土壤的适应性。
The effects of SNP, H2O2 and SNP + H2O2 treatments on the morphological characteristics of potato, water potential, osmotic adjustment substances and selective absorption of K + and Na + in secondary saline soils and residual saline soils were studied. The results showed as follows: (1) Soil salinization decreased the plant biomass, water potential, proline and soluble sugar accumulation, Na + / K + imbalance, w (Na +) / w (K +) and SNa + K + The effects of SNP, H2O2 and SNP + H2O2 alleviated the effects of saline-alkali soil on the morphology and osmotic adjustment of potato. The effects of SNP, H2O2 and SNP + H2O2 were SNP + H2O2> H2O2> SNP> (2) NO and H2O2 had additive effects on salt-alkaline resistance of potato. The results showed that exogenous NO and H2O2 alleviated the effects of saline-alkali soil on osmotic adjustment and Na + / K + absorption, alleviated the inhibition of potato growth and development and increased the adaptability of potato to saline-alkali soil.