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土壤干湿交替促进硒酸盐的还原作用
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
作者姓名:林河春 刘广深
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
基金项目:国家自然科学基金!49273188
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。

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
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
Authors:Piao Hechun  Liu Guangshen  Yuan Zhiyun  Hong Yetang
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.
Keywords:alternative drying-wetting  selenate reduction  nitrate denitrification
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