论文部分内容阅读
氮是养殖水体中的一种影响初级生产力大小的营养元素,对鱼类的生产影响很大。在养殖水体中,氮以分子态氮、无机态氮及有机态氮(如尿素、氨基酸、蛋白质)的形式存在。无机态氮包括了氨氮(NH_3—N)亚硝酸态氮(NO_2—N)和硝酸态氮(NO_3—N)三种物质。在生物和
Nitrogen is a nutrient in primary waters that affects primary productivity and has a significant impact on fish production. In aquaculture water, nitrogen is in the form of molecular nitrogen, inorganic nitrogen and organic nitrogen (such as urea, amino acids, proteins). Inorganic nitrogen includes ammonia nitrogen (NH_3-N) nitrite nitrogen (NO_2-N) and nitrate nitrogen (NO_3-N) three substances. In biology and