摘要
在6口低盐淡水(盐度2～10)池塘中放养体长0 8～1 0cm的南美白对虾(Penaeusvan namei)(30万尾/hm2),其中三口塘再放养鲢(Hypophthalmichthysmolitrix)、鳙(Aristichthysno bilis)夏花(体长2 0～3 0cm)(1500尾/hm2,鲢:鳙=1:1)。鱼、虾分别精养90d和60d。混养池塘中对虾的成活率(24 6%)为单养池(9 1%)的2 7倍,产量(800 0±86 7)kg/hm2为单养池的3 2倍;鱼产量为(93 9±7 9)kg/hm2,鳙的出塘规格大于鲢,产量高于鲢。混养池塘水中氨氮、亚硝态氮和溶解氧含量低;透明度和活性磷含量高;pH值波动幅度小。
Postlarval pacific white shrimp (Penaeus vannamei) were stocked into six low saline (salinity of 2～10) ponds at a rate of 30 individuals/m2 on 15 June, 2002, three ponds of which were stocked with silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis)juveniles (20 ～30 cm in body length) on 15 July, 2002 The shrimp were fed formulated feed and raised for 90 days and the fish were not fed and raised for 60 days The shrimp in the polyculture ponds had higher survival rate (246%) and yield (8000±867 kg/hm2 )than that in monoculture ponds There were (939±79)kg/hm2 of fish yield and higher size in polyculture ponds than in monoculture ponds Low levels of ammonia, nitrite and dissolved oxygen, high transparency and phosphorus available and constant pH values were found in polyculture ponds
出处
《水产科学》
CAS
北大核心
2003年第6期21-24,共4页
Fisheries Science
基金
辽宁省农业科技攻关资助项目(200103001)
关键词
低盐水体
南美白对虾
鲢鱼
鳙鱼
混养
成活率
产量
pacific white shrimp (Penaeus vannamei)
silver carp(Hypophthalmichthys molitrix)
bighead carp(Aristichthys nobilis)
polyculture
saline water
