摘要
氮是重要的生源物质,水体的初级生产力通常以氮化合物的数量和质量为基础,氮也是养殖水体中较常见的一种限制初级生产力的营养元素。在氮的存在形式中,以氨态氮最易被藻类利用( 生物固氮作用除外) 。但是,氨态氮对鱼类及水生饵料生物有很强的毒性,特别是其中的非离子氨( N H3) 毒性更强,其毒性强弱还受水体的p H 值、温度、溶解氧等因素的影响。
Nitrogen is an important basic element. Aquatic productivity is usual base on the quantity and the quality of nitrogen chemical combination. Nitrogen is also nitrition elments in restrictive primary productity in aquiculture. Ammonia nitrogen has strong poison to fishes and aquatic bait, especially ammonia has. and its poison is also variary of the factors of pH, temperature, dissolve oxygen.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
1999年第3期124-128,共5页
Journal of Jilin Agricultural University
关键词
氨态氮
毒性
浓度指标
渔业生产
ammonia nitrogen
fshery production
poison
concentration index