Organic carbon budget in shrimp polyculture enclosure ecosystems

摘要

The organic carbon budget in shrimp polyculture ecosystems was studied with five experi- mental enclosures. The results showed that: (1) the total organic carbon income of the ecosystems var- ide from 4 847.46 to 6 154.67 g, averaged (5 646.94 ±551.09) g, the average ratio among its com- ponents, i. e., (phytoplankton production) : (periphyte production): (feed casted )was 0.73 : 0.11: ± 281.44) g, the average ratio among its components, i. e., (plankton community respiration): (peri- phyton respiration ) : benthic community ) ; (culture animal production) : (culture animal respiration) was 0.53 : 0.19 : 0.15 : 0.04 : 0.09; (3) the organic carbon accumulation varied from 1 383. 45 to 2 707.31 g, averaged (2002.73 ± 546.76) g, which was 26/100 -44/100 of the total organic carbon income; the sequence of organic carbon accumulation in the ecosystems of different polyculature types was Y5 (Penaeus chinensis- Argopecten irradians) >Y7 (P. chinensis - Taiwan red tilapia) > Y4 (P. chinensis ) > T5 (P. chinensis-Taiwan red tilapia- Sinonouacula constricta )> y6 (P. chinensis- S. constricta) ; (4) the average conversion rate of organic carbon income to P. chinensis was (1.77 ± 0.62 ) /100 (Y6 > T5 > Y4 > Y5 > Y7 ), and that to total culture animals was (2.18 ± 0.79)/100 (T5 > Y6 > Y5 > Y4 > Y7).