| 土壤干湿交替促进硒酸盐的还原作用 |
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| 引用本文： | 林河春,刘广深.土壤干湿交替促进硒酸盐的还原作用[J].矿物学报,1997,17(1):11-16. |
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| 作者姓名： | 林河春 刘广深 |
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| 作者单位： | 中国科学院地球化学研究所环境地球化学国家重点实验室!贵阳，550002，长春科技大学地球化学系!长春，130026，中国科学院地球化学研究所环境地球化学国家重点实验室!贵阳，550002，中国科学院地球化学研究所环境地球化学国家重点实验室!贵阳，550002 |
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| 基金项目： | 国家自然科学基金!49273188 |
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| 摘 要： | 采集不同类型的新鲜土壤，经处理获得其风干、烘干的样品，重新潮湿后，加入一定量的Na2SeO4溶液，进行了培育实验（incubationexperiments）。实验结果表明，随着土壤干燥程度的增加，硒酸盐还原作用的速度也随之加快。这进一步证实，作为一种地球化学营力的土壤干湿交替，通过对土壤水势（soilwaterpotential）、微生物群落等的影响，间接地促进了硒酸盐还原作用，因而成为硒生物地球化学循环的驱动力之一。
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| 关 键 词： | 干湿交替 硒酸盐还原作用 硝酸盐脱氮化作用 |
ACCELERATION OF SELENATE REDUCTION BY ALTERNATIVE DRYING AND WETTING OF SOILS |
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| Piao Hechun,Liu Guangshen,Yuan Zhiyun,Hong Yetang.ACCELERATION OF SELENATE REDUCTION BY ALTERNATIVE DRYING AND WETTING OF SOILS[J].Acta Mineralogica Sinica,1997,17(1):11-16. |
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| Authors: | Piao Hechun Liu Guangshen Yuan Zhiyun Hong Yetang |
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| Abstract: | Different types of fresh soil were collected.Solutions of Na2SeO4 were added to fresh,airDried and oven-dried soils for incubation experiments.The experimental results showed that seleNate reduction rates increased with increasing drying degree of soils,indicationg that alterative drying-rewetting of soils,as a geochemical stress,would accelerate indirectly selenate reduction by affecting soil water potential,microbial colony,etc.Therefore,alternative drying-rewetting of soils may be one of the driving forces for biogeochemical cycle of selenium. |
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| Keywords: | alternative drying-wetting selenate reduction nitrate denitrification |
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