Total phosphorus concentrations in surface water of typical agro- and forest ecosystems in China, 2004-2010
Total phosphorus concentrations in surface water of typical agro- and forest ecosystems in China, 2004-2010作者机构：Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Department of Environmental Science Xi'an Jiaotong-Liverpool University Suzhou 215123 China
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2014年第8卷第4期
页 面：561-569页
核心收录：
学科分类：082803[工学-农业生物环境与能源工程] 07[理学] 08[工学] 0828[工学-农业工程] 09[农学] 0804[工学-仪器科学与技术] 0903[农学-农业资源与环境] 0713[理学-生态学]
基 金：This research was funded by the Key Direction in Knowledge Innovation Program of Chinese Academy of Sciences (KZCX2- EW-310) and the National Natural Science Foundation of China (Grant No. 41171153). We gratefully acknowledge the many Chinese Ecosystem Research Network (CERN) personnel who designed the monitoring networks and collected and analyzed the samples used in this study
主 题：Chinese Ecosystem Research Network
摘 要：The concentrations of total phosphorus （TP） from 83 surface water sampling sites in 29 of the Chinese Ecosystem Research Network （CERN） monitored ecosystems, representing typical agro- and forest ecosystems, were assessed using monitoring data collected between 2004 and 2010 from still and flowing surface water. Results showed that, TP concentrations were significantly higher in agro-ecosystems than those in forest ecosystems both for still and flowing surface water. For agro- ecosystems, TP concentrations in the southern area were significantly higher than those in the northern and north- western areas for both still and flowing surface water, however no distinct spatial pattern was observed for forest ecosystems. In general, the median values of TP within agro- and forest ecosystems did not exceed the Class V guideline for still （0.2mg.L-1） or flowing （0.4mg.L-1） surface water, however, surface water at some agro- ecosystem sampling sites was frequently polluted by TE Elevated concentrations were mainly found in still surface water at the Changshu, Fukang, Linze and Naiman monitored ecosystems, where exceedance （〉 0.2 mg.L-1） frequencies varied from 43% to 78%. For flowing water, elevated TP concentrations were found at the Hailun, Changshu and Shapotou monitored ecosystems, where exceedance （〉 0.4 mg. L-1） frequencies varied from 29% to 100%. Irrational fertilization, frequent irrigation and livestock manure input might be the main contributors of high TP concentrations in these areas, and reduced fertilizer applications, improvements in irrigation practices and centralized treatment of animal waste are necessary to control P loss in these TP vulnerable zones.
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