| 不同灌水频率下设施土壤盐分时空变化特征 |
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| 引用本文： | 刘涛,杜磊,郑子成,李廷轩,张锡洲.不同灌水频率下设施土壤盐分时空变化特征[J].浙江农业学报,2016,28(6):1048. |
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| 作者姓名： | 刘涛 杜磊 郑子成 李廷轩 张锡洲 |
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| 作者单位： | （四川农业大学 资源学院，四川 成都 611130） |
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| 摘 要： | 通过室内土箱模拟试验，探讨了不同灌水频率（5，10，15 d·次-1）下，栽培辣椒的设施土壤的盐分时空动态变化特征。结果表明，在各灌水频率条件下，根据土壤EC值变化，均可分为3个阶段：快速降低阶段（第1次灌水后1-20 d）、缓慢降低阶段（第1次灌水后21-40 d）和稳定阶段（第1次灌水后41-62 d）。不同灌水频率下0-20 cm土层EC值，在快速降低阶段和稳定阶段表现为5 d·次-1＞10 d·次-1＞15 d·次-1，而在缓慢降低阶段却表现为5 d·次-1＞15 d·次-1＞10 d·次-1。0-20 cm土层积盐量，在缓慢降低阶段和稳定阶段，均以10 d·次-1灌水频率下最低，表明其对0-20 cm土层盐分的淋洗作用较强。
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| 关 键 词： | 灌水频率 次生盐渍化 土壤盐分 时空动态 |
Temporal and spatial variation characteristics of salt in greenhouse soils under different irrigation frequencies |
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| LIU Tao,DU Lei,ZHENG Zi cheng,LI Ting xuan,ZHANG Xi zhou.Temporal and spatial variation characteristics of salt in greenhouse soils under different irrigation frequencies[J].Acta Agriculturae Zhejiangensis,2016,28(6):1048. |
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| Authors: | LIU Tao DU Lei ZHENG Zi cheng LI Ting xuan ZHANG Xi zhou |
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| Institution: | （College of Resources， Sichuan Agricultural University， Chengdu 611130， China） |
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| Abstract: | In the present study， temporal and spatial variation characteristics of salt in greenhouse soils were explored under different irrigation frequencies （every 5， 10， 15 d） during pepper growth by simulated experiments of soil box in greenhouse. It was shown that the whole monitoring period could be classified into 3 phases based on the changes of soil electrical conductivity （EC）: rapid decrease phase （1-20 d after first irrigation）， slow decrease phase （21-40 d after first irrigation） and stable phase （41-62 d after first irrigation）. In rapid decrease phase and stable phase， EC value in 0-20 cm soil layer decreased as every 5 d > every 10 d > every 15 d. In slow decrease phase， EC value in 0-20 cm soil layer decreased as every 5 d > every 15 d > every 10 d. In both slow decrease phase and stable phase， the smallest salt accumulation in 0-20 cm soil layer was found under the irrigation frequency of every 10 d， indicating a stronger salt leaching effect of this irrigation frequency. |
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| Keywords: | irrigation frequercy secondary salinization soil salinity spatial and temporal dynamic |
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