重庆大学学报2017，Vol.40Issue(3)：40-49,10.DOI:10.11835/j.issn.1000-582X.2017.03.005
三峡库区澎溪河消落带落干期土壤硝化强度及影响因素
Nitrification intensity in soils and its impact factors of Pengxi WLFZ in Three Gorges Reservoir area during the dry period
摘要
Abstract
The impacts of land locations,utilization patterns and elevations on soil nitrification intensity in Pengxi water-level-fluctuating zone (WLFZ) during the dry period in the Three Gorges Reservoir area were studied.The results indicate that the nitrification intensity of the WLFZ soil ranges from 0.76 mg/kg · d to 9.76 mg/kg · d,while the intensity averages at (3.76±0.76) mg/kg · d,which is significantly lower than those reported in other domestic researches.The soil nitrification intensity decreases from upstream (Hanfeng lake) to downstream (Huangshi city).In addition,the increase of elevation weakly decreases the nitrification intensity (P＞0.05).Moreover,the nitrification intensities of flood lands are 1.82 times of those of cultivated soils (P＜0.05).The soil nitrification intensity is significantly positively correlated with the soil pH value(P＜0.05) as well as the contents of organic matter and the number of nitrosobacteria (P＜0.01).Periodic flooding affects the soil pH and organic matter contents,which leads to the variation of soil nitrification intensity.关键词
三峡库区/消落带/土壤硝化强度/影响因素Key words
Three Gorges Reservoir area/water-level-fluctuation zone/soil nitrification intensity/impact factor分类
资源环境引用本文复制引用
方芳,王春明,冯磊,黄俊杰,李哲,郭劲松,高红涛..三峡库区澎溪河消落带落干期土壤硝化强度及影响因素[J].重庆大学学报,2017,40(3):40-49,10.基金项目
国家自然科学基金重点项目(41430750) （41430750）
国家自然科学基金资助项目(51179215).Supported by the Key Program of National Natural Science Foundation of China(41430750)and the National Natural Science Foundation of China(51179215). （51179215）
