• ISSN 1008-505X
  • CN 11-3996/S
刘淑侠, 李治红, 周鑫, 赵升, 李岩, 魏珉. 环境条件和外源硅浓度对黄瓜硅吸收分配的影响[J]. 植物营养与肥料学报, 2019, 25(4): 654-660. DOI: 10.11674/zwyf.18111
引用本文: 刘淑侠, 李治红, 周鑫, 赵升, 李岩, 魏珉. 环境条件和外源硅浓度对黄瓜硅吸收分配的影响[J]. 植物营养与肥料学报, 2019, 25(4): 654-660. DOI: 10.11674/zwyf.18111
LIU Shu-xia, LI Zhi-hong, ZHOU Xin, ZHAO Sheng, LI Yan, WEI Min. Effects of environmental conditions and exogenous silicon concentration on absorption and allocation of silicon in cucumber[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(4): 654-660. DOI: 10.11674/zwyf.18111
Citation: LIU Shu-xia, LI Zhi-hong, ZHOU Xin, ZHAO Sheng, LI Yan, WEI Min. Effects of environmental conditions and exogenous silicon concentration on absorption and allocation of silicon in cucumber[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(4): 654-660. DOI: 10.11674/zwyf.18111

环境条件和外源硅浓度对黄瓜硅吸收分配的影响

Effects of environmental conditions and exogenous silicon concentration on absorption and allocation of silicon in cucumber

  • 摘要:
    目的 研究不同环境条件和根际硅水平对黄瓜硅主动和被动吸收过程的影响。
    方法 以‘新泰密刺’黄瓜为试材,在人工气候室内采用水培法,设置4种环境条件:1) T1,昼/夜温度22℃/12℃、相对湿度85%/95%、光照强度300 μmol/(m2·s);2) T2,昼/夜温度22℃/12℃、相对湿度85%/95%,光照强度600 μmol/(m2·s);3) T3,昼/夜温度28℃/18℃,相对湿度55%/65%、光照强度300 μmol/(m2·s);4) T4,昼/夜温度28℃/18℃、相对湿度55%/65%、光照强度600 μmol/(m2·s)。硅吸收动力学试验营养液设置为10个Si处理浓度,依次为0、0.085、0.17、0.34、0.51、0.68、0.85、1.02、1.36、1.70 mmol/L,硅吸收分配试验设置3个硅浓度为0.085、0.17、1.7 mmol/L。
    结果 不同环境条件下黄瓜对硅的吸收速率及器官中硅含量均为T4 > T3 > T2 > T1处理;低外源硅浓度 (0.085和0.17 mmol/L) 下,黄瓜硅吸收在T1、T2、T3处理环境中以主动过程为主,在T4处理环境中以被动过程为主;高外源硅浓度 (1.7 mmol/L) 下,4种环境条件下的硅吸收均以被动过程为主;相同温度条件,强光下被动吸收的占比大于弱光,相同光照条件,高温下被动吸收的占比大于低温;相同环境条件下,随着外源硅浓度的增加,黄瓜对硅的被动吸收量和总吸收量均呈上升趋势,且被动吸收的占比增加。
    结论 环境条件和外源硅水平影响黄瓜对硅的主动和被动吸收过程,高温、强光及高外源硅浓度提高黄瓜被动吸收硅的比例。

     

    Abstract:
    Objectives This experiment was conducted to study the effects of environmental conditions and silicon supplying levels on the active and passive absorption process of Si by cucumber.
    Methods Using ‘Xintaimici’ cucumber as the tested material, soilless culture methods were adopted in an artificial climate chamber. Four environmental conditions were set up: 1) T1, day/night temperature 22℃/12℃, relative humidity 85%/95%, light intensity 300 μmol/(m2·s); 2) T2, day/night temperature 22℃/12℃, ralative humidity 85%/95%, light intensity 600 μmol/(m2·s); 3) T3, day/night temperature 28℃/18℃, ralative humidity 55%/65%, light intensity 300 μmol/(m2·s); 4) T4, day/night temperature 28℃/18℃, ralative humidity 55%/65%, light intensity 600 μmol/(m2·s). For the experiment of Si absorption dynamics, 10 levels were set up: 0, 0.085, 0.17, 0.34, 0.51, 0.68, 0.85, 1.02, 1.36, 1.70 mmol/L. For the experiment of Si absorption and distribution, three concentrations of 0.085, 0.17, 1.7 mmol/L were set up.
    Results Among 4 environmental conditions, the silicon absorption rate and silicon content in organs were all T4>T3>T2>T1. At lower silicon concentration (0.085 and 0.17 mmol/L), the silicon absorption of cucumber was mainly active process in T1, T2 and T3, and passive process in T4; at higher silicon concentrations (1.7 mmol/L), however, passive absorption was dominant under all the four environmental conditions. At same temperature, the proportion of passive absorption under strong light was greater than that under weak light. Under the same light intensity, the proportion of passive absorption at high temperature was higher than that at low temperature. Under same environmental conditions, with the increase of the exogenous silicon concentration, both the passive absorption and total absorption of silicon in cucumber increased, and the proportion of passive absorption increased.
    Conclusions Both environmental conditions and exogenous silicon concentrations affect the active and passive absorption of cucumber to silicon, high temperature, strong light and high silicon concentration increase the proportion of passive absorption.

     

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