摘要
为比较不同饵(饲)料对乌鳢(Channa argus)养殖池塘的氮磷收支变化及养殖效果,4月将体质量(310.25±27.72)g的越冬乌鳢鱼种饲养在家庭农场6口池塘中,密度为5000~5300 ind./667m^(2),分别投喂配合饲料和冰鲜鱼,每组设置3口平行池塘,定期监测乌鳢生长和水质,计算池塘氮磷收支,评价生态和经济收益。结果显示:养殖前期冰鲜鱼组乌鳢生长速度快于饲料组,养殖中后期乌鳢生长速度慢于饲料组;饲料是氮磷主要输入来源,分别占饲料组和冰鲜鱼组总氮输入的(88.66±2.06)%和(94.30±2.21)%,占总磷收入的(94.96±2.13)%和(97.10±2.40)%;沉积物是氮磷主要支出方式,分别占饲料组和冰鲜鱼组总氮支出的(39.50±1.17)%和(48.90±1.60)%,占总磷支出的(43.23±1.53)%和(53.78±1.73)%;饲料组氮磷绝对利用率和相对利用率均显著高于冰鲜鱼组,排污系数分别为7.06±0.34和2.10±0.13,均显著低于冰鲜鱼组的21.49±1.01和5.61±0.21;饲料组利润和产出投入比显著高于冰鲜鱼组。综上所述,饲料组生态和经济效益显著优于冰鲜鱼组,应不断优化乌鳢饲料配方,逐步取缔冰鲜鱼,促进乌鳢养殖健康发展。
In order to reveal changes in nitrogen and phosphorus budget in ponds and effect of different foods on Chinese snakehead Channa argus aquaculture.The overwintering snakehead fingerlings with body weight of(310.25±27.72)g were raised in six ponds of the family farm in April at a stocking density of 5000-5300 ind./667m^(2)with triplication,and fed formulated feed and chilled trash fish.The growth of the snakehead and water quality in the trail ponds were regularly monitored,the nitrogen and phosphorus income and expenditure were calculated,and the ecological and economic benefits were evaluated in the ponds.The results showed that the snakehead had better growth rate in the chilled fish group than that in the formulated feed group in the early stage of culture,and poor growth in the middle and late stages of culture.Feed was the main input source of nitrogen and phosphorus,accounting for(88.66±2.06)%and(94.30±2.21)%of the total nitrogen input in formulated feed group and chilled fish group,and(94.96±2.13)%and(97.10±2.40)%of the total phosphorus income.Sediment was the main mode of nitrogen and phosphorus expenditure,accounting for(39.50±1.17)%and(48.90±1.60)%in the total nitrogen expenditure in the feed group and chilled fish group,respectively,and(43.23±1.53)%and(53.78±1.73)%of the total phosphorus expenditure.There were significantly higher absolute and relative utilization rates of nitrogen and phosphorus in the formulated feed group than those in the chilled trash fish group,with the nitrogen discharge coefficient of 7.06±0.34 and phosphorus discharge coefficient of 2.10±0.13,significantly lower than the 21.49±1.01 and 5.61±0.21 in the chilled trash fish group,and significantly higher profit and output-input ratios in the formulated feed group than those in the chilled trash fish group.In summary,the significantly better ecological and economic benefits were observed in the formulated feed group than those in the chilled trash fish group,and the feed formula of the snakehead should be continuously
作者
周聃
黄飞
刘梅
倪蒙
邹松保
原居林
ZHOU Dan;HUANG Fei;LIU Mei;NI Meng;ZOU Songbao;YUAN Julin(Key Laboratory of Fish Health and Nutrition of Zhejiang Province,Key Laboratory of Healthy Freshwater Aquaculture,Ministry of Agriculture and Rural Affairs,Zhejiang Institute of Freshwater Fisheries,Huzhou 313001,China;Agricultural and Rural Office of Yuyue Town,Deqing Count Government,Deqing 313200,China)
出处
《水产学杂志》
CAS
2024年第4期64-69,共6页
Chinese Journal of Fisheries
基金
湖州市科技特派员项目(2021KT20).
关键词
乌鳢
生长
氮磷收支
养殖效果
经济效益
Ophiocephalus argus
growth
nitrogen and phosphorus budget
breeding effect
economic benefit
