三峡库区小江流域消落带不同坡地类型土壤磷分布特征初探  

Primary Investigation on the Distributional Characteristics of Soil Phosphorus in Different Types of Slope Land in Xiaojiang River Water-level-fluctuating Zones of Three Gorges Reservoir

作　　者：张蕾[1] 傅瓦利[1] 张治伟[1] 谭波[1] 王晓阳[1] 

机构地区：[1]西南大学地理科学学院,重庆400715

出　　处：《安徽农业科学》2011年第1期163-165,共3页Journal of Anhui Agricultural Sciences

基　　金：重庆市三峡库区消落带生态系统健康评价研究(40701179)

摘　　要：结合土壤磷素形态及含量变化与消落带坡地类型关系,探讨消落带不同坡地类型的磷素分布特征。结果表明:土+石质型坡地磷素形态变幅较大,有效性高的Ca2-P、Al-P、Ca8-P及易活性的Fe-P易在土体中累积,加强了对水体富营养化的威胁;陡/缓坡裸岩型坡地上覆土体缺乏,有效磷和水溶性磷含量均较低,变化幅度较小;稳定滩涂淤泥型坡地有效磷含量有上升趋势。Combining relationship between the variation of soil phosphorus shape and content,and the types of water-level-fluctuating zone scope land,the distributional characteristics of phosphorus of different types of slope land in water-level-fluctuating zone were discussed. The results showed that the rangeability of phosphorus shapes in soil ＋ lithic slope land was larger;Ca2-P,Al-P and Ca8-P with high effectiveness and Fe-P with high activity were easy to accumulate in the soil,thereby,the threat of eutrophication was enhanced;there was lack of overlying soil in the slope land with steep/gentle slope bare rock,so the content of available phosphorus and water-soluble phosphorus was lower,rangeability was lower;the content of available phosphorus in the slope land with sludge presented the rising trend.

关 键 词：消落带 坡地类型 无机磷形态 分布特征 

分 类 号：S159.2[农业科学—土壤学]