滦南县柳赞养殖场,地处渤海湾北岸,冬季寒冷,早春气温、水温回升较晚。对虾从越冬场迥游北上,一般年份于五月上旬开始,从当地海域捕捞或购买亲虾,进行人工孵化,时间必然推迟,缩短了对虾养殖的时期。同时,亲虾的数量和质量也没有把握。为了克服上述不利因素,适时培育出更多更 Luannan County, Luannan farms, is located in the northern coast of Bohai Bay, cold in winter, early spring temperatures, water temperature rise later. Shrimp from the overwintering are traveling north, the general year beginning in early May, from the local sea fishing or buying broodstock, artificial hatching, the time is bound to postpone, shorten the shrimp farming period. At the same time, the number and quality of broodstock are also uncertain. In order to overcome the above unfavorable factors, more timely breeding more