投饵与不投饵海参养殖池塘水质变化的初步研究

Preliminary Studies of Water Quality in the Feeding and Unfed Sea Cucumber Culture Ponds

初步调查了投饵和不投饵2口海参养殖池塘水质的变化以及换水对池塘水质的影响。实验结果表明:在2种养殖模式下,池塘水体的pH呈逐渐增大的趋势,盐度则缓慢降低,两者皆在降雨期间波动剧烈;池塘的水温、NH4+-N、NO3--N、NO2--N、NH3-N和SRP在夏季偏高,春季和秋季较低,季节变化明显;池塘水体的TN和TP表现为春季>夏季>秋季;投饵池塘NO2--N含量显著高于不投饵池塘(P<0.05),其它指标差异不显著(P<0.05);2池塘水体皆属于磷限制中度营养化水。换水后,2池塘水体的pH和盐度波动趋于平稳;TN含量差异不明显,TP含量明显降低,差异显著(P<0.05);NH4+-N、COD、NO3--N含量明显升高,差异显著(P<0.05);NO3--N、NO2--N含量换水后不投饵池塘降低,投饵池塘升高,两者差异显著(P<0.05)。换水对池塘水质的影响可能与投饵和池塘的底质有关。

This experiment was studied to monitor the fluctuations of water quality parameters and the effect of water changing in the feeding and unfed sea cucumber culture ponds.The result showed that between the two category ponds,the pH value increased slowly and the salinity declined slowly with time elapsed during the whole experiment change to and both changed significantly in the rainy season;The temperature and the concentrations of NH+4-N、NO-3-N、NO-2-N、NH3-N and SRP in both ponds had a seasonal fluctuations,which were lower in spring and autumn and higher in summer;The rank of concentrations of TN and TP were spring >summer >autumn;The water of two ponds are both medium nutrient with limited phosphorous.The effect of feeding to the water quality in both ponds was that the concentrations of the NO-2-N in the feeding pond was much higher than the unfed pond(P<0.05),but the other parameters were not significantly different(P>0.05).After changing the water,the fluctuations of pH and salinity in the two ponds tended to be smooth;the concentrations of TN did not changed significantly(P<0.05)but the concentrations of TP declined significantly(P<0.05) and the concentrations of NH+4-N、COD、NH3-N increased significantly(P<0.05);After changing the water,it appeared different about NO-3-N and NO2-N between the two ponds and the concentrations of the unfed pond declined significantly(P<0.05),but the feeding pond increased significantly(P<0.05).The effect of water changing may be concerned about the sediments of the ponds and the feeds.