A study of organic carbon, nitrogen and phosphorus budget in jellyfish-shellfish-fish-prawn polyculture ponds

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• 作者：Kai Guo ; Wen Zhao ; Zhiqiang Jiang and Shuanglin Dong
• 刊名：Aquaculture Research
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：48
• 期：1
• 页码：68-76
• 全文大小：366K
• ISSN：1365-2109

文摘

A budget describing the flow of organic carbon (OC), nitrogen (N) and phosphorus (P) through two polyculture ponds (jellyfish–shellfish–fish–prawn) was constructed. The total input of OC was 3107 kg ha⁻¹ in pond 1 and 3358 kg ha⁻¹ in pond 2, while total output was 1759 kg ha⁻¹ in pond 1 and 1325 kg ha⁻¹ in pond 2. In pond 1, the total input of N was 364 kg ha⁻¹ and output was 359 kg ha⁻¹, whereas, in pond 2, the total input of N was 439 kg ha⁻¹ and total output was 331 kg ha⁻¹. The total input of P was 75 kg ha⁻¹ in pond 1 and 66 kg ha⁻¹ in pond 2, while total outputs for pond 1 and pond 2 were 74 and 65 kg ha⁻¹ respectively. Primary production from phytoplankton contributed the largest proportion of total OC (49–56%), while feed contributed the largest proportion of N (78–81%) and P (79–80%). Animals harvested from the aquaculture ponds accounted for the largest proportion of N (50–73%) and P (49–52%), and respiration accounted for the largest proportion of OC (43–61%) output from the system. The OC, N and P use efficiency of harvested animals was 30.30%, 70.19% and 50.14% in pond 1, respectively, and 21.03%, 46.95% and 46.47% in pond 2 respectively. In terms of nutrient use, the filter-feeding bivalve, Sinonovacula constricta, was the most efficient species within the polyculture system.