Effect of Nano-Silicon on Tomato Root Conformation and Soil Enzyme Activity under Low Temperature Stress
To investigate the effect of nano-silicon on root conformation and soil enzyme activities of tomato under low temperature stress,the tomato variety'Zhongmai 9'was used as the material.The seedlings were culti-vated in a substrate within an artificial climate chamber,with foliar spraying of nano-silicon solution under two temperature treatments(ambient temperature:25℃/16℃;low temperature:15℃/6℃),and three nano-sil-icon application concentrations(0 mg/L,50 mg/L,and 100 mg/L).The study explored the effects of exoge-nous spraying of nano-silicon on tomato seedling biomass,root conformation,soil urease activity,and soil su-crase activity under low temperature stress.The results showed that compared to room temperature,low-tempera-ture stress significantly reduced the biomass,root conformation indexes and soil enzyme activities of tomato seed-lings,while exogenous spraying of nano-silicon significantly increased these parameters.In summary,low-tem-perature stress inhibits the root growth of tomato seedlings and reduces soil sucrase activity and soil urease activi-ty.The spraying of nano-silicon promotes the growth of tomato plants by increasing the total root length,the number of root tips and the number of fractal dimensions,while improving the inter-root environment by decrea-sing the soil urease activity and increasing the soil sucrase activity.The results of this study are of great signifi-cance for improving the cold tolerance of tomato.
TomatoLow temperature stressNano-siliconRoot conformationSoil enzyme
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