摘要
对进行生物增氧的鱼类越冬池底泥低温(4℃)状态下的研究表明:(1)底泥吸附性氨态氮含量平均为0.194mg/g(烘干重,下同),有效磷平均为0.0394mg/g,有机物平均为25.7mg/g;(2)间隙水中氨态氮(NH+4-N)含量为5.31~38.4mg/L,平均14.0mg/L,占无机氮总量的99.1%。活性磷酸盐(PO4-P)含量为0.111~0.632mg/L,平均0.301mg/L;(3)在无扰动条件下NH+4-N的释放速率为32.0~88.4mg/(m2·d),平均50.4mg/(m2·d),PO4-P不释放或微量释放。在微流水条件下NH+4-N和PO4-P的释放速率显著提高,其平均值依次为84.4mg/(m2·d)和4.31mg/(m2·d);(4)越冬中期底泥耗氧率平均为434O2mg/(m2·d)。研究表明在补施磷肥的情况下,适量的底泥对鱼类在进行生物增氧的越冬池中安全越冬是有好处的。
Some characteristics of sediment in the fish overwintering ponds with biological oxygen supply were studied at low temperature (4℃). The result showed: 1) on average, NH + 4 N absorbed in sediment was 0.194 mg/g (dry weight, the following are the same), available phosphorus was 0.0394 mg/g, organic matter was 25.7 mg/g. 2) NH + 4 N in interstitial water was 5.31  ̄38.4 mg/L, averaging 14.0 mg/L and accounts for 99.1% of total inorganic nitrogen; active phosphate (PO 4 P) was 0.111 ̄0.632 mg/L, average 0.301 mg/L. 3) on static condittion, NH + 4 N releasing rate was 32.0 ̄ 88.4 mg/(m 2·d), average 50.4 mg/(m 2·d). PO 4 P was not released or released with a small amount. In a continuous flow system, NH + 4 N and PO 4 P releasing rates were increased significantly, and on average, reaching 84.4 mg/(m 2·d) and 4.31 mg/(m 2·d) respectively. 4) average sediment consumption rate of oxygen was 434 O 2 mg/(m 2·d) on middIe period of overwintering. Thus, suitable amount of sediments and addition of phosphorus to a pond are useful for fish to over winter safely by biological oxygen supply.
出处
《大连水产学院学报》
CSCD
1998年第3期1-8,共8页
Journal of Dalian Fisheries University
关键词
越冬池
底泥
氮
磷释放
耗氧率
鱼类养殖池
wintering pond
sediment
interstitial water
release of phosphoru and nitrogen
oxygen consumption