山东省博兴县在保证鱼种安全越冬、提高鱼种越冬成活率方面所采取的措施一是培育体质健壮、肥满度高的大规格鱼种;二是创造良好的越冬环境,越冬池面积以1000～3000平方米、水深在2米以上、冰下水不低于1米为佳,用生石灰清池后注入新水,再施适量尿素培育浮 The measures taken by Shandong Boxing County to ensure the safety of fingerlings overwintering and to improve the survival rate of overwintering fingerlings are as follows: First, cultivate large-sized fingerling with strong physique and high plumpness; secondly, create a good winter environment, 1000 to 3000 square meters, the water depth of 2 meters or more, the ice is not less than 1 meter of water is better, with fresh lime into the pool after the new water, and then apply appropriate amount of urea to cultivate floating