养水机工作时长对参池氮磷营养盐及初级生产力的影响

采集以6 h、12 h、18 h养水机工作时长下的刺参（Stichopus japonicus）养殖池塘水样,测定无机氮、磷酸盐浓度和初级生产力毛、净产量,并对无机氮组成占比、氧化参数和P/R系数（初级生产力毛产量与自养呼吸量之比）进行了测算,以探究养水机工作时长对池塘氮、磷营养盐和初级生产力的影响。结果显示,延长养水机工作时长一方面能够促进高温期后营养盐的底-水迁移进而有效改善水、底质,另一方面还促进无机氮中的有毒氨氮（NH₄-N）硝化为硝酸盐氮（NO₃-N）;同时,延长养水机工作时长能够一定程度上增加池塘初级生产力,但受夜晚光照和温度限制,养水机工作时长由12 h增至18 h反而会消耗生产力。池塘养殖生产过程中配装养水机,最佳工作时长为12h,在节省成本的同时利于生产。

Influence of operating time of the water quality regulator on nitrogen and phosphorus content as well as primary productivity of the sea cucumber-reared ponds

Collect water samples of sea cucumber (Stichopus japonicus) ponds under the working hours of 6h, 12h, and 18h water culture machines to determine the content of inorganic nitrogen and phosphorus, as well as the gross and net yields of primary productivity, and determine the proportion of inorganic nitrogen, oxidation parameters and The P/R coefficient was calculated to explore the influence of the working hours of the water farm on the nitrogen, phosphorus, and primary productivity of the pond. The results show that prolonging the working time of the water quality regulator can promote the bottom-water migration of nutrients after the high temperature period and effectively improve the water and bottom quality. On the other hand, it can also can effectively promote the nitrification of the toxic NH4-N in DIN to NO3-N; at the same time, extending the working time of the water farm can increase the primary productivity of the pond to a certain extent, but due to the limitation of night light and temperature, increasing the working time of the water quality regulator from 12h to 18h will consume productivity . In the pond aquaculture production process, a water quality regulator is equipped, and the best working time is 12 hours, which saves costs and is conducive to production.