对虾池生态系统溶解有机碳及颗粒有机碳的周日动态

刘国才

对虾池生态系统溶解有机碳及颗粒有机碳的周日动态

刘国才

DIURNAL DYNAMICS OF DOC AND POC IN SHRIMP POND ECOSYSTEMS

LIU Guo Cai

摘要

摘要: 对两个海水养虾池溶解有机碳（ＤＯＣ）及颗粒有机碳（ＰＯＣ）的周日动态进行了研究。结果表明，ＤＯＣ的浓度１４：００～１８：００下降，１８：００～２２：００升高，之后又下降，周日波动幅度为３．２２ｍｇＬ（１池）及１．２４ｍｇＬ（２池）。ＰＯＣ浓度白天（６：００～１８：００）升高，夜间（１８：００～次日６：００）下降，周日波动幅度为１．２８ｍｇＬ（１池）及１．２６ｍｇＬ（２池）。ＰＯＣ浓度高的虾池，ＤＯＣ浓度也较高；ＤＯＣＰＯＣ白天（６：００～１８：００）降低，夜间（１８：００～次日６：００）上升，两池分别在２：００（１池）及６：００（２池）达到高峰；ＤＯＣＰＯＣ比周日平均为１．６∶１．０（１池）及１．９∶１．０（２池）；悬浮颗粒有机质ＣＮ比在１８：００最大，１８：００到次日６：００呈下降趋势。更多还原

Abstract: Diurnal dynamics of DOC and POC in two shrimp ponds were studied. It was shown that: DOC concentration decreased from 14: 00 to 18: 00, increased from 18: 00 to 22: 00, then decreased again, and ranged from 3. 22 mgPL ( Pond 1) to 1. 24 mgPL ( Pond 2) ; while POC concentration increased gradually in daytime( 6: 00- 18: 00) and decreased gradually at night( 18: 00- next 6: 00) , and ranged from 1. 28 mgPL( Pond 1) to 1. 26 mgPL( Pond 2) . The pond with a high POC concentration was also with a high DOC concentration. The rates of DOCPPOC decreased gradually in daytime( 6: 00- 18: 00) , increased gradually at night( 18: 00- next 6: 00) , and peaked at 2: 00( Pond 1) and 6: 00( Pond 2) . The diurnal ratios of DOCPPOC averaged 1. 6P1. 0( Pond 1) and 1. 9P1. 0( Pond 2) . CPN ratios of suspending organic particulated matters were the biggest at 18: 00 and decreased gradually at night( 18: 00- next 6: 00) .

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