| 盐胁迫对蔬菜地土壤微生物及土壤酶活的毒害效应 |
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| 引用本文： | 周德平,吴淑杭,褚长彬,刘芳芳,姜震方,范洁群.盐胁迫对蔬菜地土壤微生物及土壤酶活的毒害效应[J].农业环境保护,2011(8):1602-1607. |
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| 作者姓名： | 周德平 吴淑杭 褚长彬 刘芳芳 姜震方 范洁群 |
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| 作者单位： | 上海市农业科学院生态环境保护研究所,上海201106 |
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| 基金项目： | 国家科技部后世博专项（2010BAK69B18）; 上海市科委崇明专项（09DZ1906200 10DZ1960100）; 上海市农业科学院科技发展基金项目（沪农科发2008（08）） |
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| 摘 要： | 采用外源投加盐分培养室模拟方法,研究了不同强度盐胁迫对蔬菜地土壤微生物和土壤酶的生态毒理效应。结果表明,在盐胁迫试验强度条件下,蔬菜地土壤细菌种群遭遇盐胁迫后,生长受抑、数量减少,放线菌种群抗逆性强、数量上升,土壤真菌种群数量因细菌种群数量的减少而出现暂时性增长现象,但随胁迫时间延长也呈现毒害效应,数量下降,且低于对照;盐胁迫造成土壤微生物优势种群演替和微生态失衡,细菌比例降低,真菌比例上升;盐胁迫明显抑制土壤脲酶和蛋白酶活性,抑制程度与外加盐量呈正比,即盐胁迫强度越大,土壤蛋白酶和脲酶活性越低;而土壤转化酶和过氧化氢酶的活性在低盐胁迫强度（外加盐量为1g·kg-1）时略高于对照组,但随盐胁迫强度的加重,转化酶和过氧化氢酶活性相应降低,盐含量越高,酶活性越低;土壤盐胁迫强度与土壤脲酶、蛋白酶、转化酶和过氧化氢酶活性均呈高度线性负相关,其中蛋白酶和转化酶与盐胁迫程度的相关性高且稳定,0.930≤r≤0.993。
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| 关 键 词： | 盐胁迫 微生物 土壤酶 毒理 蔬菜土壤 |
Eco-Toxicological Effects of Salt Stress on Microorganisms and Enzymes Activities in Vegetable Soil |
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| ZHOU De-ping,WU Shu-hang,CHU Chang-bin,LIU Fang-fang,JIANG Zhen-fang,FAN Jie-qun.Eco-Toxicological Effects of Salt Stress on Microorganisms and Enzymes Activities in Vegetable Soil[J].Agro-Environmental Protection,2011(8):1602-1607. |
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| Authors: | ZHOU De-ping WU Shu-hang CHU Chang-bin LIU Fang-fang JIANG Zhen-fang FAN Jie-qun |
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| Institution: | (Institute of Eco-Environmental Protection,Shanghai Academy of Agricultural Sciences,Shanghai 201106,China) |
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| Abstract: | Influence of salt stress on microflora and enzymes activities in vegetable soil was studied through artificially adding simulated composites salt（SCS） into natural vegetable soil.The SCS was designed according to components of the saline soil in Shanghai,which comprised 14.6% Ca2＋,7.9% Na＋,4.0% Mg2＋,45.4% NO-3,16.0% SO2-4,12.1% Cl-.Compared with the control,bacteria amount decreased,but actinomycete increased in all four different salt-enhanced soils（1,5,10,20 g·kg-1） at all five testing intervals.In additions,fungi rose up in all the salt-enhanced soils at 15th day,and then dropped down at 30th,45th and 70th day.The ratio of bacteria/microorganisms-cultured in soil（MCS） decreased and that of fungi/MCS increased.There were negative correlation between the activities of four enzymes（urease,protease,invertase and catalase） and salt content except for invertase,catalase under the low salt stress（1 g·kg-1）.Correlation analysis indicated that the activities of soil urease,protease,invertase and catalase were highly negative linear correlation with salt content in vegetable soil.Especially,the correlations between protease and invertase were high and stable,and the coefficients were between-0.930 and-0.997. |
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| Keywords: | salt stress microbe enzyme in soil eco-toxicology vegetable soil |
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