CAJ | 학술논문

前文讨论了投饵养鱼对潘家口水库水体中氮素的影响，本文进一步阐述围隔试验中，投饵养鱼对磷素的影响。结果表明，潘家口水库是典型的“磷限制”型水体，总氮和总磷质量浓度比高达112，投饵养鱼极大降低了水体中氮磷质量浓度比，试验结束时投饵养鱼围隔氮磷质量浓度比介于2.60~5.63；试验期间，投饵围隔中总磷、溶解性总磷和溶解性正磷酸盐质量浓度随时间变化一致，其质量浓度高低排序相同：投饵＞投饵单养花鲢＞投饵混养花鲢和鲤鱼＞投饵单养鲤鱼，除投饵单养鲤鱼围隔，其余围隔中各形态磷质量浓度均显著高于对照围隔和水库水体。然而，颗粒态磷质量浓度顺序为：投饵＞投饵单养鲤鱼＞投饵混养花鲢和鲤鱼＞投饵单养花鲢。假定单位质量鱼肉含磷量不随鱼体生长而改变，则捕捞可去除的磷素量分别是92.4mg（2#）、995.5mg（3#）和714.7mg （4#），分别占投放鱼饵总磷的0.5%、4.1%和3.1%。
전문토론료투이양어대반가구수고수체중담소적영향，본문진일보천술위격시험중，투이양어대린소적영향。결과표명，반가구수고시전형적“린한제”형수체，총담화총린질량농도비고체112，투이양어겁대강저료수체중담린질량농도비，시험결속시투이양어위격담린질량농도비개우2.60~5.63；시험기간，투이위격중총린、용해성총린화용해성정린산염질량농도수시간변화일치，기질량농도고저배서상동：투이＞투이단양화련＞투이혼양화련화리어＞투이단양리어，제투이단양리어위격，기여위격중각형태린질량농도균현저고우대조위격화수고수체。연이，과립태린질량농도순서위：투이＞투이단양리어＞투이혼양화련화리어＞투이단양화련。가정단위질량어육함린량불수어체생장이개변，칙포로가거제적린소량분별시92.4mg（2#）、995.5mg（3#）화714.7mg （4#），분별점투방어이총린적0.5%、4.1%화3.1%。
This is the second part of this series. In the previous paper, nitrogen flux influenced by cultur-ing fish with fish food was discussed in detail. In this paper, phosphorus flux was elucidated as well. The results indicate that the Panjiakou reservoir is a typical“phosphorus-limitation”water body, and the con-centration ratio for nitrogen and phosphorus is 112,while addition fish food for fish culturing drastically de-crease the ratio to 2.60-5.63. During running period,total phosphorus,total dissolved phosphorus and ortho-phosphate concentrations showed the same tendency in fish food presented enclosures, and were higher than that in control enclosure and reservoir water except the carp culturing enclosure. The rank order for to-tal phosphorus, total dissolved phosphorus and orthophosphate concentrations were as follows:adding fish food only (1#) > feeding bighead carp (2#) > feeding both bighead carp and carp (4#) > feeding carp (3#). However, the rank order for the particle phosphorus concentration was adding fish food only (1#)>feeding carp (3#)> feeding both bighead carp and carp (4#)> feeding bighead carp (2#). Assumed that the phosphorus content per gram fish was constant with the fish growing, phosphorus removal by netting fish were 92.4mg (2#),995.5mg (3#) and 714.7mg (4#),which accounted 0.5%,4.1% and 3.1%,respec-tively,for the phosphorus brought by fish food addition.