土壤学报2013，Vol.50Issue(3)：540-547,8.
褐土中铁的氧化还原与碳素转化
RELATIONSHIP BETWEEN ANAEROBIC REDOX OF IRON OXIDES AND CARBON TRANSFORMATION IN CINNAMON SOIL
摘要
Abstract
A Dissimilatory iron reduction,an important microbial process of the degradation of organic matter in anaerobic environment,is closely related to mineralization of organic carbon.Samples of cinnamon soil were prepared into slurry and then incubated anaerobically in dark or under illumination,to study effect of illumination on iron oxides reduction.Water soluble inorganic carbon and total water soluble carbon were analyzed simultaneously to explore relationship between anaerobic redox of iron oxides and carbon transformation under illumination in cinnamon soil.Results show that 55.31％ of the free iron oxides in the soil could be reduced anaerobically under dark regime,and only 38.90％ could under illumination.As Fe(Ⅱ) produced anaerobically could be oxidized by oxygen generated by photosynthesis of cyanobacteria,the reduction rate of free iron oxides was found to be lowered to 7.95％ after 40 days of anaerobic incubation under illumination.The content of soluble total carbon and soluble inorganic carbon increased by 69％ and 246％,respectively,after 40 days of anaerobic incubation in dark,while they both displayed a rising-and-then-declining trend during anaerobic incubation under illumination.When the 40 days of incubation ended soluble total carbon and inorganic carbon was found only 47％ and 70％ higher,respectively,than it was at the beginning of the incubation The content of soluble total carbon was closely related to the content of 0.5 mol L-1 HCl extractable iron,while the content of soluble inorganic carbon was to the content of Fe(Ⅱ) in the soil under the incubation.关键词
旱作褐土/铁氧化物/厌氧氧化还原/光合产氧/碳素转化Key words
Upland cinnamon soils/Iron oxides/Anaerobic reduction and oxidation/Photosynthetic oxygen generation/Carbon transformation分类
农业科技引用本文复制引用
孙丽蓉,黄海霞,王旭刚,郭大勇,王利朋,刘素云..褐土中铁的氧化还原与碳素转化[J].土壤学报,2013,50(3):540-547,8.基金项目
国家自然科学基金项目(41101215)、河南省科技攻关项目(11210211007)和河南科技大学实验技术开发基金项目(SY1011040)资助 （41101215）
