【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 mg/L(Pond 1) to 1.24 mg/L(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 mg/L(Pond 1) to 1.26 mg/L(Pond 2). The pond with a high POC concentration was also with a high DOC concentration. The rates of DOC/POC 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 DOC/POC averaged 1.6/1.0(Pond 1) and 1.9/1.0(Pond 2). C/N ratios of suspending organic particulated matters were the biggest at 18:00 and decreased gradually at night(18:00-next 6:00).更多还原