%0 Journal Article
%T Characteristics of Phosphorous Release from Soil in Periodic Alternately Waterlogged and Drained Environments at WFZ of the Three Gorges Reservoir<br>三峡库区消落区周期性干湿交替环境对土壤磷释放的影响
%A MA Li-min
%A ZHANG Ming
%A TENG Yan-hang
%A ZHAO Jian-fu
%A <br>马利民
%A 张明
%A 滕衍行
%A 赵建夫
%J 环境科学
%D 2008
%I 
%X The water-fluctuation-zone (WFZ) of reservoir and big river had special environmental characteristics that were a joint of aquicolous and terrestrial ecological system. According to the WFZ' s alternately waterlogged and drained environment, the control experiment for phosphorous release with purple alluvial soil of the water-fluctuation-zone (WFZ) at the Three Gorges Reservoir were carried out. Research was focused on the characteristics of phosphorous release from soil in the WFZ in periodic inundating-draining environment. Results showed that the release of T-P increased after each inundating process, from 15.4 mg x kg(-1) at first time to 26.5 mg x kg(-1) at third time. The activity of each phosphorous fraction at the water-soil interface in alternately inundating-draining conditions followed the sequence of Ca2-P, Fe-P > Ca8-P, Al-P > O-P > Ca10-P. The main impetus of phosphorous release at continuing inundating condition was the solubilization of Ca2-P and the transformation of Fe-P at alternately oxidizing-deoxidizing conditions; and the main impetus of phosphorous release at alternately inundating-draining conditions was the latter. In addition, inundation could not make O-P release from the soil, but it activated O-P which transformed to Fe-P when drained and Fe-P could be released when inundated again. The activeness of Ca2-P was highest among all kinds of phosphorous, and its concentration is from 14 mg x kg(-1) at beginning of inundated process to 5 mg x kg(-1) at end of inundated process. The results showed there was an increase of activated O-P after each waterlogged period, and a decrease after each drained period.
%K Three Gorges Reservoir
%K water-fluctuation-zone
%K phosphorous release
%K inundate
%K drain<br>三峡库区
%K 消落区
%K 磷释放
%K 淹水
%K 落干
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=E7E74E90A99CF50A1C137C634290BE30&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=E158A972A605785F&sid=2418F98BB0851817&eid=C7A7E1E32985D389&journal_id=0250-3301&journal_name=环境科学&referenced_num=2&reference_num=13