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世界有机食品运动与我国的有机水产品生产 总被引：4，自引：0，他引：4
人口、环境、资源是新世纪人类面临的最重要问题 ,世界范围的食物供应压力更是为世人所关注。随着农业现代化程度的提高 ,以专业化、一致性和可控性为主要生产原理的传统工业化农业对环境的强烈副作用以及对人类健康的消极影响也日益显现出来。20世纪30年代瑞士人缪勒发明的DDT以及由此引发的化学治虫方式大大提高了农作物的产量 ,各种抗生素的发明和生产推动了畜牧业的发展 ,以及其它化学药品、添加剂等的使用为农业生产的发展和产量的提高都起到了推动作用[1]。但是这种生产方式使自然界生态平衡遭受了巨大破坏 ,自然环境受到严重污染 ,… 相似文献
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南美白对虾(Penaeus vannamei)是北美和中南美洲普遍饲养的一种对虾,它不但具有生长迅速、对饲料蛋白质需求量低、出肉率高、离水存活时间长和易集约化养殖等优点,而且具有很强的抗病能力和对环境的适应能力。江苏省大丰市等地区的养殖试验表明,该对虾与中国对虾同池混养,在中国对虾陆续染病死亡的同时,该对虾却健壮活泼、生长旺盛,是值得我国大力推广的对虾养殖新品种。由于南美白对虾自然分布于西太平洋沿岸,我国无天然资源,因此,采取全人工育苗技术解决该虾苗种问题已成为当务之急。研究表明,该种雌虾在日常蓄养条件下性腺不会成熟,在驯养条件下其成熟也无规律(Yono,1990)。迄今为止,国内尚未见有南美白对虾池养雌虾促熟措施方面的报道。为此,我们在1995年工作基础上,于1996年3-5月,对池养南美白对虾雌虾进行了摘除眼柄、强化营养、控制光照等促熟对比试验,取得了较好的效果。 相似文献
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Copper content in the hepatopancreas of wild parent Panaeus orientals was more than 500 ug/g(wet wt), among which over 90% distributed in the cytosol. 99% of the Cu in the subcellular fraction distributed in a very low molecular weight (VLMW )pool.DE-11 anion exchange chromatography of the VLMW material indicated that about 83% of the Cu in the pool could not be absorbed in the exchanger. Some main compounds containing copper (accounting for 77% of the Cu in the cytosol )were isolated from the cytosol fraction using a CM-32 cation exchange column. Amino acid analysis of the compounds showed that histidine was a major component, accounting for 58.2% of the total amino acids in the compounds, and that the contents of lysine and serine were also higher (9.6% and 7.6%, respectively), indicating that Cu in the material isolated by CM-32 perhaps mainly existed as a histidine-Cu complex, and that some of it could have complexed with serine, glysine and/or their peptides. 相似文献
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REQUIREMENTS OF SHRIMP, PENAEUS CHINENSIS O''''SBECK FOR POTASSIUM, SODIUM, MAGNESIUM AND IODINE 总被引：2，自引：0，他引：2
Potassium, sodium, magnesium and iodine requirements of shrimp, Penaeus chinensis were studied.Orthogonal design was employed in this experiment. The composition of the basal diet consisted of fishmeal, peanut cake, corn meal, soybean cake, wheat bran, vitamin mix and mineral mix, and supple-mentations of potassium, sodium, magnesium and iodine in the basal diet were made according to theL_9(3~4) orthogonal table. The results indicatal that iodine supplementation improved growth of the shrimpsignificantly and raised survival very significanly, iodine requirement of the shrimp was 0.003%, sodiumrequirement was 0.87% or less; and that 1.1-1.3% potassium and 0.18-0.38% magnesium in the dietwere proper nutrition supplements for the shrimp. 相似文献
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目前,国内养殖黑鲷（Ｓｐａｒｕｓ ｍａｃｒｏｃｅｐｈａｌｕｓ）的饲料主要是鲜杂鱼、虾等。而随着近海渔业资源的枯竭,作为饲料的鲜杂鱼、虾数量也越来越少,已远远满足不了海水养殖业发展的需要。另外,从营养角度上来讲,单独投喂鲜杂鱼、虾也难以满足黑鲷的营养需求,常常会出现某些营养缺乏症,且易污染水质,引发疾病。与此相反,新兴起的养鱼配合饲料具有来源广、成本低、营养全等优点,是现代养殖技术的一大突破。为进一步推动黑绸养殖生产的发展,作者于１９９４年５～９月,在河北省黄骅市海水养殖公司养殖场利用网箱进行了人… 相似文献
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