摘要
为减少青蟹疾病爆发的风险、提高青蟹产量。从生态学角度出发,养殖后期在半封闭式青蟹养殖池塘中放养细基江蓠,结合水体理化因子、青蟹产量与存活率等指标探讨细基江篱对养殖水体的水质改善作用。结果发现:DO、pH分别在放养细基江蓠之后第10天、20天开始显著地高于同期的对照池塘,盐度从第20天开始显著地低于同期的对照池塘;NH4+、NO2-浓度从第10天开始低于同期的对照池塘,无机磷(IP)与化学需氧量(COD)指标由于起始浓度比对照池塘高,在整个监测期间基本一直高于对照池塘,但是,在第40天两口池塘的IP浓度的差异逐渐缩小。此外,拟穴青蟹的产量、存活率分别比对照池塘高出14.30 kg、2.23%,其他各品种的产量与存活率也均高于对照池塘。上述结果表明,细基江蓠改善了半封闭式拟穴青蟹养殖池塘的水质,降低了水体理化因子恶化的可能性,提高了青蟹与其他养殖品种的产量与成活率,使得控制、减少青蟹病害的发生成为可能,值得进一步地推广。
In order to reduce the risks and to enhance the crab yields.We threw the seaweed Gracilaria tenuistipitata into the crab pond with a semi-closed culture mode in the late cultivation period,and combined the parameters of the environmental factors and the crab yields and survival rate to check the improvement effects on water quality from the ecological aspect.It was shown that the levels of dissolved oxygen（DO） and pH had been significantly higher than those of the control pond since the tenth day and the twentieth day respectively（P0.05）,the salinity had been significantly lower than the control since the twentieth day（P 0.05）,the level of ammonia-N and nitrite-N had been lower than the control from the tenth day,and the level of phosphate-P and chemical oxygen demand（COD） was always higher than the control during the whole period owe to high starting levels of the former.But on the fortieth day the difference between the phosphate-P levels of the two ponds decreased.Moreover,the crab yields and survival rate was respectively 14.30 kg and 2.23% higher than the control,as well as those of the other cultured animals.It was indicated that the seaweed G.tenuistipitata improved the water quality in the crab pond with a semi-closed culture mode,reduced the probability of environmental factors degradation and increased the crab yields and survival rate,which enable controlling and deducing crab disease outbreak being feasible.So,this culture mode may be popularized in Niutianyang Culture Zone.
出处
《中国农学通报》
CSCD
2012年第14期138-143,共6页
Chinese Agricultural Science Bulletin
基金
广东高校产学研结合示范基地科技成果转化重大项目"锯缘青蟹病害防控及健康养殖技术应用示范与推广"(cgzhzd0812)
广东省海洋渔业科技推广专项项目"渔业生态与环境保护技术研究/汕头牛田洋滨海湿地生态环境修复技术及养殖开发研究"(A200905J01)
国家海洋局海洋公益项目"典型水域清洁生产与环境安全技术研究与示范"(200905020)
广东省科技计划项目"锯缘青蟹适口配合饲料研发及应用示范"(2010A020507001-89)
关键词
拟穴青蟹
细基江蓠
水质
mud crab（Scylla paramamosain）
Gracilaria tenuistipitata
water quality
