摘要
于1998年6～9月间在鱼虾混养围隔中 ,研究了在全封闭条件下 ,水体中总无机氮(TIN ,表示3种无机氮之和 )及其组分的浓度以及3种组分相对含量的变化与鱼虾放养密度及其他环境因子 (叶绿素、化学耗氧量 (COD)、溶解氧 (DO)、水温、盐度、pH等 )的相互关系。结果表明 :TIN及其组分的绝对含量与对虾和罗非鱼的放养密度呈极其显著的正相关。TIN及其组分的绝对含量与水温有正相关性 ,但相关性不显著 ,而与pH、盐度呈负相关 ,且这种负相关性有随放养密度增加而提高的趋势。叶绿素与TIN及其组分的绝对含量无明显相关性 ,但其影响氨氮、硝氮在TIN中的相对含量。DO与TIN及其组分的绝对含量及氨氮的相对含量表现为负相关 ,而与硝氮的相对含量呈正相关。COD与TIN、三氮的关系比较复杂。
Studies on the interrelationships among concentration of inorganic nitrogen, stocking densities of cultured animals and environmental factors in shrimp fish polyculture ecosystem were carried out from June to September 1998.The results showed that:(1)The relationships between three kinds of inorganic nitrogen and stocking densities were significant positive(α=0.01).(2)The relationships between water temperature and concentration of three nitrogen were also positive, whereas those between pH and three nitrogen as well as those between salinity and three nitrogen were negative,and with increased stocking densities,the relationships became more conspicuous.(3) With increased dissolved oxygen(DO),the concentration of three nitrogen decreased. DO influenced the ratio of nitrate with ammonia,with the increase of DO,the ratio increased.(4)The relationships between the concentration of chlorophyll and those of three nitrogen were not significant.Like DO,chlorophyll can change the ratio of nitrate with ammonia.(5)The relationships between chemical oxygen demand(COD) and three nitrogen were rather complex.
出处
《海洋科学》
CAS
CSCD
北大核心
2000年第10期44-47,共4页
Marine Sciences
基金
国家攀登计划B专题"对虾池生态系及其结构与功能的优化"(PD-B-7-3)
国家"九五"攻关计划专题"滩涂池塘养殖系统养殖容量与优化技术"(969220202)的部分内容
关键词
养虾围隔
无机氮
放养密度
环境因子
Shrimp culturing enclosure,Inorgannic nitrogen,Stocking density, Environmental factors
