摘要
在不换水、不用药条件下,在室内采用相同规格(3.50 m×7.15 m×1.20 m)水泥池和相同养殖密度300 ind/m3,分别以水位40、80、110 cm淡水养殖凡纳滨对虾81 d,研究不同养殖水位(水量)下凡纳滨对虾的生长与养殖系统的氮、磷收支。结果表明:40 cm水位试验组成活率、单位体积水体产量显著高于其他2组(P<0.05);80 cm水位组饵料系数显著高于其他2组(P<0.05);收获虾的体长、体重3组间均无显著差异(P>0.05);3个组单位面积水体产量两两间差异显著(P<0.05);按40、80、110 cm水位组顺序排列,来自投饵的氮占输入总氮的比分别为95.9%、95.8%、96.3%,来自投饵的磷占输入总磷的比分别为97.5%、97.5%、97.8%;收获虾输出氮占总输出氮的比分别为37.6%、35.7%、28.7%,收获虾输出磷占总输出磷的比分别为12.6%、14.0%、11.5%;终末水层和沉积物输出氮占总输出氮的比分别为41.8%、56.3%、63.6%,终末水层和沉积物输出磷占总输出磷的比分别为77.1%、66.4%、73.2%。
The study was carried out in concrete ponds of the same rating （3.50 m×7.15 m× 1.20 m） with the culture densities of 300 ind/m3 under the condition of no medicine and water exchange, the water levels were 40, 80 and 110 cm, respectively. The effect of different water levels（volumes） on nitrogen and phosphorus budgets in culture systems and the growth of Litopenaeus vannamei were analysed by 81 d period of freshwater indoor culture. The results showed that the survival and the per volume yield in the lowest water level （40 cm） group was significantly higher than those in the other groups （P〈0.05）. The feed coefficient in highest water level （110 cm） was significantly higher than that in the other groups（P〈0.05）. The length and weight of harvested shrimps showed no significant differences among three groups （P〉0.05）. The per unit yield showed significant differences among the three groups （P〈0.05）. The results also showed that feed was the main source of nitrogen and phosphorus inputs in each group, respectively accounting for 95.9%, 95.8% and 96.3% input of nitrogen and 97.5%, 97.5% and 97.8% input of phosphorus in ponds with water level of 40, 80 and 110 cm, respectively. 37.6%, 35.7% and 28.7% of nitrogen input and 12.6%, 14.0% and 11.5% of phosphorus input respectively in ponds with each water level were recovered as harvested shrimp biomass while 41.8%, 56.3% and 63.6% of nitrogen input and 77.1%, 66.4%, 73.2% of phosphorus input respectively in ponds with each water level remained in the water and sediment.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第5期526-530,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
上海市科委创新行动计划重点攻关项目(073919102)
国家标准化管理委员会下达项目(SFQ6-272)
关键词
凡纳滨对虾
养殖水位
成活率
产量
氮磷收支
Litopenaeus vannamei
water level
survival
yield
nitrogen and phosphorus budgets
