摘要
在单养鲢(Hypophthalmichthys molitrix)的塑料养殖箱中植入黄菖蒲(Iris pseudacorus),按黄菖蒲∶鲢(生物量,g/m3)约为1∶3、2∶3、1∶1、4∶3设置4个实验组(对照组不加黄菖蒲),研究鲢养殖水体植入黄菖蒲对水质及鲢生长的影响。每周定时测定养殖水体中TN、TP、COD的变化及黄菖蒲、鲢鱼的生长情况等。结果显示,实验组水体TN、TP和COD浓度相比无黄菖蒲组显著降低,实验组对TN、TP、COD的清除率分别为:生物量比1∶3组(黄菖蒲5株):63.95%、59.06%、46.55%;生物量比2∶3组(黄菖蒲10株):80.25%、68.46%、43.84%;生物量比1∶1组(黄菖蒲15株):78.05%、69.13%、31.49%;生物量比4∶3组(黄菖蒲20株):75.54%、63.76%、27.06%。各实验组中黄菖蒲和鲢生长情况良好,实验生物量比2∶3组鲢特定生长率最高达0.33%/d,黄菖蒲特定生长率也最高。结果表明:在鲢养殖水体中引入水生植物黄菖蒲可以一定程度上改善养殖水质,并促进鲢的生长。
The paper studied the effect of Iris pseudacorus implantation on water quality and feed efficiency in Hypophthal- michthys molitrix ponds. L pseudacorus and H. molitrix were divided into 4 experimental groups, and biomass ratios were 1： 3, 2： 3, 1： 1, 4：3 respectively （ the control group without Iris pseudacorus）. During the experiment, the variations of nutrients, survival and growth of the aquaculture water were detected every 7 days. The results showed that the nutrition and COD of experimental groups decreased significantly compared with the control group, the uptake rates of L pseudacorus （5 strains） on nutrients of TN, TP and COD were 63.95% , 59. 06% and 46. 55% respectively. In the Lpseudacorus （ 10 strains） system, the rates of nutrients uptake in order were 80. 25% , 68.46% , 43.84% respectively, and 78.05% , 69. 13%, 31.49% respectively in L pseudacorus （ 15 strains） group, and 75.54% , 63.76% , 27.06% respectively in L pseudacorus （20 strains ） group. While biomass ratios were 2 ： 3, the special growth rate （SGR） of H. molitrix was 0. 33% , and the SGR of L pseudacorus was the highest. The results showed that polyculture the H. molitrix with the L pseudacorus can improve the quality of aquaculture water, and promote the growth of H. molitrix.
出处
《淡水渔业》
CSCD
北大核心
2015年第5期109-112,共4页
Freshwater Fisheries
