为探究凡纳滨对虾养殖水体悬浮颗粒物的产生及发展规律,本试验对养殖过程中悬浮颗粒物的主要来源,以及曝气量和曝气方式对悬浮颗粒物数量的影响进行研究,旨在减少在养殖过程中悬浮颗粒物对水质的影响,解决浓度过高而降低凡纳滨对虾的成...为探究凡纳滨对虾养殖水体悬浮颗粒物的产生及发展规律,本试验对养殖过程中悬浮颗粒物的主要来源,以及曝气量和曝气方式对悬浮颗粒物数量的影响进行研究,旨在减少在养殖过程中悬浮颗粒物对水质的影响,解决浓度过高而降低凡纳滨对虾的成活率从而影响养殖效益的问题。在室内水温26℃~28℃,盐度为30的条件下,进行了3个试验,1) 投放30尾凡纳滨对虾仔虾(A1)、不投放凡纳滨对虾(B1);2) 均采用气石曝气的条件下,曝气量8 ml/s (A2)、16 ml/s (B2)、24 ml/s (C2)、32 ml/s (D2);3) 曝气量均为24 ml/s的条件下,气石曝气(A3)、微孔纳米管曝气(B3)、文丘里射流器曝气(C3)。试验时间均为30 d,结果表明:在实验过程中A1、B1两组悬浮颗粒物、溶解氧(DO)、总氨氮(TAN)和亚硝酸氮()浓度均有显著性差异(P 浓度最大值分别为(667.3 ± 16.7) mg/L、(1.18 ± 0.08) mg/L和(0.52 ± 0.04) mg/L,DO最小值为(4.76 ± 0.08) mg/L;试验结束时C2组的悬浮颗粒物、TAN和浓度均显著低于A1组(P 浓度均显著低于C3组(P In order to explore the generation and development law of suspended particulates in the aquaculture water of Litopenaeus vannamei, this experiment studied the main sources of suspended particulates in the aquaculture process, as well as the influence of aeration rate and aeration method on the number of suspended particulates, aiming to reduce the impact of suspended particulates on water quality in the aquaculture process and solve the problem that high concentration reduces the survival rate of Litopenaeus vannamei and affects the efficiency of breeding. Under the conditions of indoor water temperature of 26˚C~28˚C and salinity of 30, three experiments were carried out: 1) Put 30 Litopenaeus vannamei in the tank (A1) and not with Litopenaeus vannamei (B1);2) Under the condition of aeration of air stone, the aeration volume is 8 ml/s (A2), 16 ml/s (B2), 24 ml/s (C2) and 32 ml/s (D2);3) Under the condition that the aeration volume is 24 ml/s, aerated by gas stone (A3), aeration of microporous nanotubes (B3), and aeration of Venturi jet (C3). The test time was 30 days, and the results showed that there were significant differences in the concentrations of suspended particulate matter, dissolved oxygen (DO), total ammonia nitrogen (TAN) and nitrite nitrogen () between the A1 and B1 groups during the experiment (P in the A1 group in the later stage of cultivation were (667.3 ± 16.7) mg/L, (1.18 ± 0.08) mg/L and (0.52 ± 0.04) mg/L, respectively, and the minimum DO was (4.76 ± 0.08) mg/L. At the end of the experiment, the concentrations of suspended particulate matter, TAN and in the C2 group were significantly lower than those in the A1 group (P in group B3 were significantly lower than those in group C3 (P Litopenaeus vannamei, and the selection of 24 mg/L aeration capacity and microporous nanotubes as aeration equipment could effectively reduce the generation of suspended particulate matter and control the water quality in the process of shrimp culture.展开更多
为研究添加枯草芽孢杆菌形成的生物絮团加循环水养殖系统对凡纳滨对虾(Litopenaeus vannamei)养殖水体的净化效果和短期内能否达到平衡状态,在凡纳滨对虾循环水养殖系统水槽中,以不加菌和红糖为对照(A组)、加菌(B组)、加红糖(C组)及加...为研究添加枯草芽孢杆菌形成的生物絮团加循环水养殖系统对凡纳滨对虾(Litopenaeus vannamei)养殖水体的净化效果和短期内能否达到平衡状态,在凡纳滨对虾循环水养殖系统水槽中,以不加菌和红糖为对照(A组)、加菌(B组)、加红糖(C组)及加菌和红糖(D组)进行短期(72 h)生物絮团净化循环水养殖水体试验,24 h生物絮团和12 h循环净化水质。结果显示,试验结束时B、C、D组的生物絮团体积显著高于A组(P P C > B > A,D组TAN下降率(35.9 ± 5%)显著高于A、B、C三组(14.2% ± 8%、11.3% ± 4%、30.2% ± 5%) (P NO2−-N浓度升高10.1% ± 0.3%,D组的NO2−-N下降率为49% ± 10.4%,显著高于B、C组(11.3% ± 0.2%、6.4% ± 0.5%) (P NO2−-N浓度在前24 h与生物絮团体积呈极显著负相关,后期基本趋于稳定。试验期间A、B、C组养殖水体中悬浮颗粒物数量均有升高,而D组悬浮颗粒物减少21.5 ± 3.9%,显著高于其他三组(P B > C > D。试验期间各组pH均有所下降,结束时B、C、D组pH都显著低于A组(P NO2−-N和悬浮颗粒物。To investigate the purification effect of biofloc formed by Bacillus subtilis plus recirculating aquaculture system (RAS) on Litopenaeus vannamei aquaculture water and whether a balance can be achieved in the short term, a short-term (72-h) biofloc-recirculating aquaculture system was used to purify aquaculture water in tanks for L. vanname with no bacteria and brown sugar as a control (group A), bacteria added (group B), brown sugar added (group C) and bacteria and brown sugar added (group D), and the water was purified by 24 h biofloc and 12 h circulation. The results showed that at the end of the trial, the biofloc volume in groups B, C, and D was significantly higher than that in the group A (P P P C > B > A, and the decrease rate of TAN in group D (35.9% ± 5%) was significantly higher than that in groups A, B and C (14.2% ± 8%, 11.3% ± 4% and 30.2% ± 5%) (P NO2−-Nincreased by 10.1% ± 0.3% in group A, and the decrease rate of NO2−-Nin group D was 49 ± 10.4%, which was significantly higher than that in groups B and C (11.3% ± 0.2%, 6.4% ± 0.5%) (P NO2−-Nin group D were significantly negatively correlated with the volume of biological floc in the first 24 h, and tended to be stable in the later period. During the trial, the concentration of suspended particulate in groups A, B, and C increased slightly, while group D achieved a suspended particulate removal rate of (21.5 ± 3.9)%, significantly higher than the other three groups (P B > C > D. All groups experienced a decrease in pH during the trial, and the pH levels in groups B, C, and D were significantly lower than that in the group A at the end of the trial (P B. subtilis and brown sugar with shrimp circulating aquaculture system can achieve balance in the short term and effectively purify TAN, NO2−-N, and suspended particulate in aquaculture water.展开更多
文摘为探究凡纳滨对虾养殖水体悬浮颗粒物的产生及发展规律,本试验对养殖过程中悬浮颗粒物的主要来源,以及曝气量和曝气方式对悬浮颗粒物数量的影响进行研究,旨在减少在养殖过程中悬浮颗粒物对水质的影响,解决浓度过高而降低凡纳滨对虾的成活率从而影响养殖效益的问题。在室内水温26℃~28℃,盐度为30的条件下,进行了3个试验,1) 投放30尾凡纳滨对虾仔虾(A1)、不投放凡纳滨对虾(B1);2) 均采用气石曝气的条件下,曝气量8 ml/s (A2)、16 ml/s (B2)、24 ml/s (C2)、32 ml/s (D2);3) 曝气量均为24 ml/s的条件下,气石曝气(A3)、微孔纳米管曝气(B3)、文丘里射流器曝气(C3)。试验时间均为30 d,结果表明:在实验过程中A1、B1两组悬浮颗粒物、溶解氧(DO)、总氨氮(TAN)和亚硝酸氮()浓度均有显著性差异(P 浓度最大值分别为(667.3 ± 16.7) mg/L、(1.18 ± 0.08) mg/L和(0.52 ± 0.04) mg/L,DO最小值为(4.76 ± 0.08) mg/L;试验结束时C2组的悬浮颗粒物、TAN和浓度均显著低于A1组(P 浓度均显著低于C3组(P In order to explore the generation and development law of suspended particulates in the aquaculture water of Litopenaeus vannamei, this experiment studied the main sources of suspended particulates in the aquaculture process, as well as the influence of aeration rate and aeration method on the number of suspended particulates, aiming to reduce the impact of suspended particulates on water quality in the aquaculture process and solve the problem that high concentration reduces the survival rate of Litopenaeus vannamei and affects the efficiency of breeding. Under the conditions of indoor water temperature of 26˚C~28˚C and salinity of 30, three experiments were carried out: 1) Put 30 Litopenaeus vannamei in the tank (A1) and not with Litopenaeus vannamei (B1);2) Under the condition of aeration of air stone, the aeration volume is 8 ml/s (A2), 16 ml/s (B2), 24 ml/s (C2) and 32 ml/s (D2);3) Under the condition that the aeration volume is 24 ml/s, aerated by gas stone (A3), aeration of microporous nanotubes (B3), and aeration of Venturi jet (C3). The test time was 30 days, and the results showed that there were significant differences in the concentrations of suspended particulate matter, dissolved oxygen (DO), total ammonia nitrogen (TAN) and nitrite nitrogen () between the A1 and B1 groups during the experiment (P in the A1 group in the later stage of cultivation were (667.3 ± 16.7) mg/L, (1.18 ± 0.08) mg/L and (0.52 ± 0.04) mg/L, respectively, and the minimum DO was (4.76 ± 0.08) mg/L. At the end of the experiment, the concentrations of suspended particulate matter, TAN and in the C2 group were significantly lower than those in the A1 group (P in group B3 were significantly lower than those in group C3 (P Litopenaeus vannamei, and the selection of 24 mg/L aeration capacity and microporous nanotubes as aeration equipment could effectively reduce the generation of suspended particulate matter and control the water quality in the process of shrimp culture.
文摘为研究添加枯草芽孢杆菌形成的生物絮团加循环水养殖系统对凡纳滨对虾(Litopenaeus vannamei)养殖水体的净化效果和短期内能否达到平衡状态,在凡纳滨对虾循环水养殖系统水槽中,以不加菌和红糖为对照(A组)、加菌(B组)、加红糖(C组)及加菌和红糖(D组)进行短期(72 h)生物絮团净化循环水养殖水体试验,24 h生物絮团和12 h循环净化水质。结果显示,试验结束时B、C、D组的生物絮团体积显著高于A组(P P C > B > A,D组TAN下降率(35.9 ± 5%)显著高于A、B、C三组(14.2% ± 8%、11.3% ± 4%、30.2% ± 5%) (P NO2−-N浓度升高10.1% ± 0.3%,D组的NO2−-N下降率为49% ± 10.4%,显著高于B、C组(11.3% ± 0.2%、6.4% ± 0.5%) (P NO2−-N浓度在前24 h与生物絮团体积呈极显著负相关,后期基本趋于稳定。试验期间A、B、C组养殖水体中悬浮颗粒物数量均有升高,而D组悬浮颗粒物减少21.5 ± 3.9%,显著高于其他三组(P B > C > D。试验期间各组pH均有所下降,结束时B、C、D组pH都显著低于A组(P NO2−-N和悬浮颗粒物。To investigate the purification effect of biofloc formed by Bacillus subtilis plus recirculating aquaculture system (RAS) on Litopenaeus vannamei aquaculture water and whether a balance can be achieved in the short term, a short-term (72-h) biofloc-recirculating aquaculture system was used to purify aquaculture water in tanks for L. vanname with no bacteria and brown sugar as a control (group A), bacteria added (group B), brown sugar added (group C) and bacteria and brown sugar added (group D), and the water was purified by 24 h biofloc and 12 h circulation. The results showed that at the end of the trial, the biofloc volume in groups B, C, and D was significantly higher than that in the group A (P P P C > B > A, and the decrease rate of TAN in group D (35.9% ± 5%) was significantly higher than that in groups A, B and C (14.2% ± 8%, 11.3% ± 4% and 30.2% ± 5%) (P NO2−-Nincreased by 10.1% ± 0.3% in group A, and the decrease rate of NO2−-Nin group D was 49 ± 10.4%, which was significantly higher than that in groups B and C (11.3% ± 0.2%, 6.4% ± 0.5%) (P NO2−-Nin group D were significantly negatively correlated with the volume of biological floc in the first 24 h, and tended to be stable in the later period. During the trial, the concentration of suspended particulate in groups A, B, and C increased slightly, while group D achieved a suspended particulate removal rate of (21.5 ± 3.9)%, significantly higher than the other three groups (P B > C > D. All groups experienced a decrease in pH during the trial, and the pH levels in groups B, C, and D were significantly lower than that in the group A at the end of the trial (P B. subtilis and brown sugar with shrimp circulating aquaculture system can achieve balance in the short term and effectively purify TAN, NO2−-N, and suspended particulate in aquaculture water.
