对虾养殖实验围隔中的固氮作用及其氮输入  

THE NITROGEN FIXATION AND AS A NITROGEN INPUT IN SHRIMP CULTURE ENCLOSURES

作　　者：齐振雄[1,2] 张曼平[1,2] 李德尚[1,2] 董双林[1,2] 

机构地区：[1]青岛海洋大学水产养殖开放研究实验室 [2]青岛海洋大学化学化工学院

出　　处：《水产学报》1999年第1期40-44,共5页Journal of Fisheries of China

基　　金：国家自然科学基金;国家"九五"攻关专题

摘　　要：１９９７年６～１０月，以乙炔还原法进行了不同放养模式下对虾养殖实验中生物固氮作用的测定。结果表明，各围隔中，对虾单养（Ｙ－４）和对虾＋海湾扇贝（Ｙ－５）的固氮作用较高，均值分别为２．６２μｇＮ／（Ｌ·ｈｒ）和２．６５μｇＮ／（Ｌ·ｈｒ）；对虾＋罗非鱼＋缢蛏（Ｔ－５）的最低，为１．５３μｇＮ／（Ｌ·ｈｒ），对虾＋缢蛏（Ｙ－６）和对虾＋罗非鱼（Ｙ－７）的分别为２．３０μｇＮ／（Ｌ·ｈｒ）和１．８９μｇＮ／（Ｌ·ｈｒ）。各围隔中固氮速率较高与水体有效氮含量较低及有效氮磷比值不高有关。水层固氮蓝藻主要为蓝球藻（Ｃｈｒｏｃｏｃｕｓ）和念珠藻（Ｎｏｓｔｏｃ）。估算各围隔实验期间固氮作用输入分别为Ｙ－４∶１７．７２ｇ；Ｙ－５∶１９．６３ｇ；Ｙ－６∶９．０５ｇ；Ｙ－７∶１０．５９ｇ；Ｔ－５∶７．９９ｇ。The nitrogen fixation in shrimp culture enclosures at different culture styles was measured using acethlene reduction method. The results were as follows: In all enclosures, the nitrogen fixation rates were the highest 2.62 gN/(Lhr) for Y-4, the enclosure monocultured with shrimp Penaeus chinensis and 2.65gN/(Lhr) for Y-5, the enclosure polycultured with shrimp and bay scallop, the lowest 1.53gN/(Lhr) for T-5, the enclosure polycultured with shrimp, tilapia Oreochrromis niloticus and constracted tanglus Sinonovacula costricata, 2.30gN/(Lhr) for Y-6,the enclosure polycultured with shrimp and constrcacted tanglus, and 1.89gN/(Lhr) for Y-7, the enclosure polycultured with shrimp and tilapia. In the enclosures, the high nitrogen fixation rates may concern with the low avaliable nitrogen concentration and the low N/P ratio, compared with the Redfield ratio. The nitrogen fixation bluegreen algae were mainly Chroococus, and then Nostoc . Estimated nitrogen fixation as nitrogen inputs for different

关 键 词：对虾 养殖 固氮作用 氮输入 围隔实验 

分 类 号：S968.22[农业科学—水产养殖]