| 砷对土壤脲酶活性影响的研究 |
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| 引用本文： | 和文祥,马爱生,武永军,朱铭莪.砷对土壤脲酶活性影响的研究[J].应用生态学报,2004,15(5):895-898. |
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| 作者姓名： | 和文祥 马爱生 武永军 朱铭莪 |
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| 作者单位： | 1. 西北农林科技大学资环学院,杨凌,712100;沈阳大学沈阳环境工程重点实验室,沈阳,110044
2. 沈阳大学沈阳环境工程重点实验室,沈阳,110044 |
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| 基金项目： | 国家自然科学基金重点项目 ( 2 0 3 3 70 10 )，国家自然科学基金( 3 93 70 14 8)，沈阳大学沈阳环境工程重点实验室基金资助项目 |
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| 摘 要： | 采用模拟方法对As污染土壤脲酶特征进行了研究．结果表明，土壤中As浓度在0～200mg·kg^-1浓度范围内，反应初期脲酶活性变化无明显规律；一年后砷激活土壤脲酶活性，二者达到显著或极显著正相关．随As浓度增加，土壤脲酶Km值基本不变或略有增加，Vmax增大，从机制上揭示出As加速脲酶-尿素复合物的解离．厩肥和无肥土样脲酶对As的反应类似，只是变化幅度有所差异．
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| 关 键 词： | 土壤脲酶 砷 动力学特征 |
| 文章编号： | 1001-9332(2004)05-0895-04 |
| 修稿时间： | 2003年3月11日 |
Effect of arsenic on soil urease activity |
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| HE Wenxiang ,MA Aisheng ,WU Yongjun ,ZHU Minge.Effect of arsenic on soil urease activity[J].Chinese Journal of Applied Ecology,2004,15(5):895-898. |
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| Authors: | HE Wenxiang MA Aisheng WU Yongjun ZHU Minge |
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| Institution: | College of Resource and Environmental, Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China. hewenxiang@sina.com |
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| Abstract: | By simulation method,this paper studied the urease activity in arsenic polluted soils.The results showed that arsenic could activate soil urease activity after added for one year.With arsenic addition,soil urease activity remarkably increased,and there existed a significantly positive correlation.The V max of soil urease increased with arsenic addition,while the K m of urease in high and low fertility soil was unchanged and slight increased,respectively.It is proved that As could accelerate the separating velocity of enzyme-urea complexes.This paper also illustrated that soil properties were important to study the relationship between soil enzyme and pollutants. |
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| Keywords: | Soil urease Arsenic Kinetic characteristics |
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