应用生态学报2017，Vol.28Issue(9)：2778-2786,9.DOI:10.13287/j.1001-9332.201709.016
三峡水库峡谷地貌区消落带土壤氮磷钾、有机质含量和pH值的时空动态
Temporal and spatial dynamics of soil nitrogen, phosphorus, potassium, organic matter and pH in the water level fluctuation zone of canyon landform area of the Three Gorges Reservoir, China
摘要
Abstract
Based on the long-term monitoring data of soil chemical properties before never experiencing water level fluctuation (2008) and after experiencing 1 time (2009),4 times (2012),7 times (2015) of water level fluctuation in the water level fluctuation zone with the altitude of 155-172 m,located at the Wushan and Zigui section of the Three Gorges Reservoir (TGR),the temporal and spatial dynamics of soil nitrogen (N),phosphorus (P),potassium (K),organic matter (OM) and pH value were studied and their nutrient status were evaluated.The contents of soil total nitrogen (TN),available nitrogen (AN),available potassium (AK) and OM gradually decreased with the increasing times of experiencing water level fluctuation,while the contents of total phosphorus (TP),total potassium (TK) and available phosphorus (AP),and pH value exhibited the opposite trend.The contents of TN,TK and AP in different soil layers displayed as Wushan ＞ Zigui before never experiencing water level fluctuation and after experiencing 1 time of water level fluctuation.However,after experiencing 4 times and 7 times of water level fluctuation,they changed as Zigui ＞ Wushan.Differences of soil chemical indicators in different soil layers gradually decreased with the increasing times of experiencing water level fluctuation.Compared with the nutrient classification standard of the national second soil census,the contents of TP and AP were extremely high grade in Zigui plot and the content of AP was high grade in Wushan plot after experiencing 7 times of water level fluctuation,and other soil indicators were in the middle or below grade.The hydrological regime characteristics of the TGR and the interference of human activities,as well as the differences of soil chemical indicators in nature were the major driving factors that caused the temporal and spatial dynamics of soil N,P,K,OM and pH in the water level fluctuation zone of canyon landform area of the TGR.关键词
土壤化学性质/时空动态/消落带/三峡水库/峡谷地貌区Key words
soil chemical property/temporal and spatial dynamics/water level fluctuation zone/Three Gorges Reservoir/canyon landform area引用本文复制引用
简尊吉,裴顺祥,郭泉水,秦爱丽,马凡强,赵玉娟,肖文发,康义..三峡水库峡谷地貌区消落带土壤氮磷钾、有机质含量和pH值的时空动态[J].应用生态学报,2017,28(9):2778-2786,9.基金项目
本文由“十二五”国家科技支撑计划项目(2015BAD07B040301)资助 （2015BAD07B040301）
This work was supported by the National Science and Technology Pillar Program during the Twelfth Five-year Plan Period (2015BAD07B040301). （2015BAD07B040301）
