虾池生态系能量收支和流动的初步分析

Primary analysis of the energy budget and flow in the shrimp pond ecosystem

根据日本刺沙蚕作为动物性活饵在虾池食物链中的作用 ,对虾池生态系中的有机质收支 ,生物能量流动及其转化效率进行了分析。结果表明 ,虾池在养殖期间输入和合成的有机质能量为 1 3 72 5.1 4 k J/m2 ,其中 ,初级产量为 752 3 .82k J/m2 ,约占总输入的 55%。有机质在养殖期间的支出量平均 1 0 3 59.2 8k J/m2 ,其中 ,生物呼吸 7988.4 9k J/m2 ,占总支出的 77% ;对虾产量平均 874 .4 9k J/m2 ,占总支出的 8.4 %。虾池的收入大于支出 ,平均有 2 4 .5%的收入有机质沉积池底。在虾池能量收支中 ,对虾产量与输入和合成有机质能量之比及虾产量与人工饵料能量之比分别平均为 6.4 %和 1 4 %。

With Polycheate Neanthes japonica as a forage animal for Penaeus chinensis , the organic matter energy budget, biological energy flow and energy turnover efficiency for shrimp pond ecosystems of Qingdui District in Zhuanghe of Liaoning Province were studied. By experiments in 4 ponds, the total energy of input and productive organic matter was estimated 13725 kJ/m 2 on the average.The primary production was 7 524 kJ/m 2, and input artificial diet was 6201 kJ/m 2 Total output was 10359 kJ/m 2,8 4% of which was transfered to shrimp yields and 77% consumed for biorespiration About 7 1%～38.2% input organic matter energy was deposited on the bottom in the farming period. According to energy budget, the ratio of the shrimp yields to total input energy and to the artifical diet energy were 6.4% and 14% respectively.