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| 养水机工作时长对参池氮磷营养盐及初级生产力的影响 |
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李乐洲1, 孙广伟2, 张东升1, 王玉龙1, 杨耿介1, 芦宇婷3, 卢宏博1, 周玮1
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1.大连海洋大学 水产与生命学院, 辽宁 大连 116023;2.全国水产技术推广总站 中国水产学会, 北京 100125;3.大连海洋大学 海洋科技与环境学院, 辽宁 大连 116023
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| 摘要: |
| 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12 h，在节省成本的同时利于生产。 |
| 关键词: 养水机 不同工时 营养盐 初级生产力 |
| DOI：10.11759/hykx20210320001 |
| 分类号:S967.4 |
| 基金项目:辽宁省科学计划项目（2018104009）；辽宁省“兴辽英才”项目（XLYC1808029）；大连市2020年度科技特派团项目；大连市重点领域创新团队支持计划项目（2019RT11）；大连市第二批领军人才项目 |
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| 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 |
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LI Le-zhou1, SUN Guang-wei2, ZHANG Dong-sheng1, WANG Yu-long1, YANG Geng-jie1, LU Yu-ting3, LU Hong-bo1, ZHOU Wei1
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1.School of Fisheries and Life Sciences, Dalian Ocean University, Dalian 116023, China;2.National Fisheries Technology Promotion Station, Chinese Fisheries Society, Beijing 100125, China;3.College of Ocean Technology and Environment, Dalian Ocean University, Dalian 116023, China
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| Abstract: |
| This research was conducted with an objective to study the influence of operating hours of water quality regulators on the characteristics of sea cucumber (Stichopus japonicus) reared pond water. Samples were collected periodically during the operating time of 6 h, 12 h, and 18 h to measure the oxidation parameters as well as the inorganic nitrogen and phosphorus content of cultured water. In addition, the P/R coefficient(the ratio of gross primary productivity to autotrophic respiration) along with gross and net yields was calculated to analyze the primary productivity of the pond. The results exhibit 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 of the pond water. In addition, it can effectively promote the nitrification of the toxic NH4-N in dissolved inorganic nitrogen 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; however, due to a few limitations such as night light and temperature, increasing the working time of the water quality regulator from 12 h to 18 h will consume productivity. In order to achieve productive and profitable pond management, aquaculture equipped with a water quality regulator working optimally for a 12 h period is recommended. |
| Key words: water quality regulator different working hours nutrient salt primary productivity |