| Impact of aquaculture on eutrophication in Changshou Reservoir |
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| 作者姓名： | 张晟 刘景红 魏世强 高吉喜 王定勇 张可 |
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| 作者单位： | COLLEGE OF RESOURCES AND ENVIRONMENT SOUTH-WEST AGRICULTURAL UNIVERSITY CHONGQING 400716 CHINA，CHONGQING KEY LAB. OF AGRICULTURAL RESOURCES AND ENVIRONMENT CHONGQING 400716 CHINA，CHONGQING ACADEMY OF ENVIRONMENTAL SCIENCE CHONGQING 400020 CHINA，COLLEGE OF RESOURCES AND ENVIRONMENT SOUTH-WEST AGRICULTURAL UNIVERSITY CHONGQING 400716 CHINA，CHONGQING KEY LAB. OF AGRICULTURAL RESOURCES AND ENVIRONMENT CHONGQING 400716 CHINA，COLLEGE OF RESOURCES AND ENVIRONMENT SOUTH-WEST AGRICULTURAL UNIVERSITY CHONGQING 400716 CHINA，CHONGQING KEY LAB. OF AGRICULTURAL RESOURCES AND ENVIRONMENT CHONGQING 400716 CHINA，CHONGQING ACADEMY OF ENVIRONMENTAL SCIENCE CHONGQING 400020 CHINA，COLLEGE OF RESOURCES AND ENVIRONMENT SOUTH-WEST AGRICULTURAL UNIVERSITY CHONGQING 400716 CHINA，CHONGQING KEY LAB. OF AGRICULTURAL RESOURCES AND ENVIRONMENT CHONGQING 400716 CHINA，CHONGQING ACADEMY OF ENVIRONMENTAL SCIENCE CHONGQING 400020 CHINA |
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| 基金项目： | THISWORKWASFINANCIALLYSUPPORTEDBYTHECHONGQINGNATURALSCIENCFOUNDATIONANDCHONGQINGMUNICIPALGOVERNMENT(NOS.2004BB7075AND2005BB7239)ANDSINOITALIANCOOPERATIONPROJECT(SURVEYANDASSESSMENTONECOLOGYINTHETHREEGORGESAREA). |
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| 摘 要： | 1INTRODUCTION EUTROPHICATIONCANBEUNDERSTOODASAPHENOME NONOFTHEENRICHMENTOFNUTRIENTSINAWATERBODY.THE MOSTIMPORTANTNUTRIENTSTHATCAUSEEUTROPHICATIONARE PHOSPHATES,NITRATESANDAMMONIA(CAIQINGHUA,1993;HORNEANDGOLDMAN,1994).THEMOSTPROMI NENTFEATURESOFEUTROPHICWATERSARETHEHIGHCONTENTS OFNUTRIENTSANDTHEABUNDANCEOFPLANKTONSORATTACHED ALGAE.EUTROPHICATIONISACOMMONPHENOMENO…
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| 关 键 词： | 水产养殖 富营养化 水质 营养物质 水库 |
Impact of aquaculture on eutrophication in Changshou Reservoir |
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| Sheng Zhang,Jinghong Liu,Shiqiang Wei,Jixi Gao,Dingyong Wang,Ke Zhang.Impact of aquaculture on eutrophication in Changshou Reservoir[J].Chinese Journal of Geochemistry,2006,25(1):90-96. |
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| Authors: | Sheng Zhang Jinghong Liu Shiqiang Wei Jixi Gao Dingyong Wang Ke Zhang |
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| Institution: | (1) College of Resources and Environment, South-West Agricultural University, 400716 Chongqing, China;(2) Chongqing Key Lab. of Agricultural Resources and Environment, 400716 Chongqing, China;(3) Chongqing Academy of Environmental Science, 400020 Chongqing, China |
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| Abstract: | As a result of intensifying human activities around the Changshou Reservoir, water environ mental quality has declined over the years. Water quality had been monitored from 1999 to 2002. The re sult indicated that the concentrations of total nitrogen (TN) and total phosphorus (TP) are high. The con centrations of phosphorus range from 0.037 mg/L to 0. 444 mg/L, exceeding the critical value (0.02 mg/ L) for eutrophication. The concentrations of total nitrogen and chlorophyll a range from 0.70 mg/L to 4.18 mg/L and from 1.10 mg/m3 to 61.2 mg/m3 , respectively. The eutrophication status of the water body was assessed using the method of integrated nutrition state index, which revealed that all sampling sites were eutrophicated from the year of 2001. About 69.6% of the annual total nitrogen input and 26% of the annual total phosphorus input originated from the upstreams. The contributions of nitrogen and phos phorus from precipitation to the water body are very small (0.9% and 0.3%, respectively) owing to their low contents (1.21 mg/L and 0.029 mg/L, respectively). Runoff is the secondarily important input source, which accounts for 19.0% of the total N input and 47.0% of the total P input, respectively. At tention should be paid to the aquaculture inputs, whose contributions account for 10.5% of the total N and 26.6% of the total phosphorus to the water body, respectively. Nutrient loads are estimated to be 118 gNm-2 · a-1 and 8 gPm -2 · a-1 About 69.4% of nitrogen and 79.7% of phosphorus input into the res ervoir were retained in 2002. |
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| Keywords: | aquaculture eutrophication Changshou Reservoir nutrition status |
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