| 长期咸水灌溉对土壤酶活性及反应动力学的影响 |
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| 引用本文： | 翟红梅,曹彩云,刘孟雨.长期咸水灌溉对土壤酶活性及反应动力学的影响[J].干旱地区农业研究,2018,36(1):95-101. |
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| 作者姓名： | 翟红梅 曹彩云 刘孟雨 |
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| 作者单位： | 中国科学院遗传与发育生物学研究所农业资源研究中心中国科学院农业水资源重点实验室河北省节水农业重点实验室;石家庄学院化工学院;河北省农林科学院旱作农业研究所; |
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| 基金项目： | 国家科技支撑计划项目(2009BADA3B-03-08，2011BAD06B02-3)；河北科技计划项目(15222903D)；石家庄学院博士基金项目(21602000201) |
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| 摘 要： | 为了探讨咸水灌溉导致土壤质量下降的原因,研究了5个含盐量水平(1.25(对照)、2.50、5.00、7.50d S·m~(-1)和10.00 d S·m~(-1))的咸水长期田间污染对0~20 cm和20~40 cm土壤水解酶活性及酶促反应动力学性质的影响。结果表明:咸水灌溉导致土壤脲酶、β-葡糖苷酶和碱性磷酸酶活性呈现不同程度的降低,与对照相比,10d S·m~(-1)咸水灌溉下0~20 cm土壤层三种酶活性分别下降45.5%、50.8%和24.9%,20~40 cm土壤层三种酶活性分别下降37.44%、32.1%和21.8%;咸水灌溉改变了土壤酶的催化动力学特性,与对照相比,10 d S·m~(-1)咸水灌溉下脲酶、β-葡糖苷酶和碱性磷酸酶的最大反应速度V_(max)分别下降47.77%、44.62%和15.01%,Km分别下降57.12%、保持不变和下降14.64%,β-葡糖苷酶V_(max)/K_m下降39.63%,脲酶和碱性磷酸酶的V_(max)/K_m没有显著变化。数据表明咸水灌溉对不同的酶抑制机制不尽相同。
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| 关 键 词： | 咸水灌溉 土壤酶活性 土壤酶动力学 抑制机制 |
Impact of irrigation with saline water on soil enzyme activity and soil enzyme kinetics |
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| ZHAI Hong-mei,CAO Cai-yun,LIU Meng-yu.Impact of irrigation with saline water on soil enzyme activity and soil enzyme kinetics[J].Agricultural Research in the Arid Areas,2018,36(1):95-101. |
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| Authors: | ZHAI Hong-mei CAO Cai-yun LIU Meng-yu |
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| Institution: | Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences; Hebei Key Laboratory of Agricultural Water-Saving; Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, Hebei 050022, China; College of Chemistry, Shijiazhuang University, Shijiazhuang, Hebei 050035, China,Dry farming Research Institute of Hebei Academy of Agricultural and Forestry Sciences, Hengshui, Hebei 053000, China and Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences; Hebei Key Laboratory of Agricultural Water-Saving; Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, Hebei 050022, China |
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| Abstract: | |
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| Keywords: | saline water irrigation soil enzyme activities soil enzyme kinetics inhibition mechanism |
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