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江苏省盐城市郊区今年淡水养殖面积达到10.58万亩,比上午增长5.2％,与往年相比,今年水产养殖结构出现五个显著特点:①放养时间一般提前1～2个月,使鱼种春放改为冬放,延长了生长期,提高了鱼种成活率;②大规格鱼种的投放量比去年增加24.4％,今年热水鱼的上市量可占养殖总产量60％以上;③品种结构有较大改变,草食性、肥水性鱼类比例增加,耗粮型鱼类比例下降,养殖品种由原来的8个增加到12个,其中:鲢、鳙鱼占41.3％,草、鳊、鲂鱼占
Yancheng City, Jiangsu Province, suburbs of freshwater aquaculture this year reached 10.58 million mu area, an increase of 5.2% over the previous year, compared with previous years, aquaculture structure this year there are five distinct characteristics: ① stocking time generally 1 to 2 months earlier, Put it into winter, prolong the growth period and improve the survival rate of fish species; ② large-scale species of fish put in more than last year increased by 24.4%, the hot water fish this year, the market can account for more than 60% of total aquaculture production; ③ species The proportions of herbivorous and fertile fish increased, while the proportion of consumption-type fish decreased. The number of farmed species increased from 8 to 12, of which silver carp, bighead carp accounted for 41.3% Catfish accounted for