虾塘中新生残饵的N、P营养物质溶出速率及其变化规律研究

通过实验模拟的测定结果,估算了新生残饵对虾塘养殖环境的可能影响程度.结果表明,两种新生残饵的N、P营养物质溶出速率及其TN与TP、IP与TP比值,随其生成时间的延长均有较大幅度变化,且变化趋势相近.贻贝新生残饵因其分解速率较快,故对养殖水体短期影响较大,但其总体影响却并不大于配合饵料.新生残饵是对虾养殖水环境及其临近浅海环境的主要污染源.

Dissolving rates of N and P from newborn remains produced by feeding and their changing patterns in shrimp pond

Based on determinations of simulation experiment, the influence of newborn remains on environment in shrimp pond is estimated. The results show that the dissolving rates of N and P from two kinds of culturation newborn remains and their TN/TP and IP/TP ratios are varied in a greater range with the lapse of time, and the general changing patterns of the two newborn remains are similar. Because the remains produced by mussel decomposes very fast, it has a great short term influence on cultural environment, but its long term influence is no more serious than that of mixed feed. The newborn remain is a main pollutant source for shrimp cultural environment and its adjacent waters.