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guan yu jia kuai qi qi ha er shi yin jin he tui guang yang zhi yu lei xin pin zhong de dui ce yu jian yi
Author(s): 
Pages: 30-32+41
Year: Issue:  3
Journal: Heilongjiang Fisheries

Keyword:  新品种对策与建议养殖鱼类优良品种引进引种生产实践池塘养殖数量与质量推广应用;
Abstract: <正> 鱼类引种是一项见效快的育种方法,不仅在水产科学研究上有着重要的价值,而且在生产实践上具有十分重要的现实意义。凡是水产养殖业比较发达的国家和地区,为提高水产品的数量与质量,都在优良品种的选育和引进上下功夫。近年来,我市虽然也开始引进和推广了一些养殖新品种,但从整体上来看,养殖品种相对单一,且品质混杂,现存的主要养殖鱼类的品系纯度下降,优良性状退化,生长优势明显减弱,鱼肉品质下降,如不采取有效的措
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