CAJ | 학술논문

采用室内模拟研究的方法,研究中华绒螯蟹(Eriocheir sinensis)有机和常规养殖底泥中氮、磷的溶出规律.结果显示:有机组氨态氮溶出总量明显高于常规组,覆水前期,底泥厚度是决定氨态氮溶出总量的主要因子,中后期底泥类型成为主要因素.相同厚度底泥中有机组硝态氮的污染负荷明显低于常规组.常规组较有机组更容易在短时间内溶出硝态氮和亚硝态氮.5 cm和10 cm底泥厚度下有机组溶出总磷量分别高于常规组60.5%和56.5%,但在前4 d有机组的溶出速率低于常规组,应提早换水以有效控制总磷浓度.
채용실내모의연구적방법,연구중화융오해(Eriocheir sinensis)유궤화상규양식저니중담、린적용출규률.결과현시:유궤조안태담용출총량명현고우상규조,복수전기,저니후도시결정안태담용출총량적주요인자,중후기저니류형성위주요인소.상동후도저니중유궤조초태담적오염부하명현저우상규조.상규조교유궤조경용역재단시간내용출초태담화아초태담.5 cm화10 cm저니후도하유궤조용출총린량분별고우상규조60.5%화56.5%,단재전4 d유궤조적용출속솔저우상규조,응제조환수이유효공제총린농도.
A laboratory simulation was used to compare the dissolution characteristics of nitrogen and phosphorus from sediments in organic and conventional crab (Eriocheir sinensis) farming system. The results showed that the total dissolution quantity of NH_4~+ -N from the sediment of organic crab farming system was distinctively larger than the conventional one. In the early part of the experiment, the organic group with sediment thickness of 10 cm demostrated larger NH_4~+ -N dissolution potential than the conventional group with sediment thickness of 5 cm. But the sediment type became the major influencing factor later. With the same sediment thickness, the organic farming system demonstrated smaller NO_3~- -N pollution capacity than the conventional one. No matter what thickness of the sediment (5 cm or 10 cm) , NO_3~- -N and N0_2~- -N from the sediment of conventional farming systemn was dissolved easier than the organic one in a short period of time. But it is reversed for total phosphorus with sediment thickness of 5 cm. And during the first 4 days, the total phosphorus dissolution rate of the organic farming sediment was lower than the conventional one.