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随着稻田养鱼技术的不断改进与提高,稻田养鱼产量也不断上升。但从大面积来看,产量的提高还是比较缓慢。我县从1984年与省农科院合作中试稻萍鱼立体种养。1989年示范的500亩,平均亩产达84公斤。但大面积推广的10万亩产量一直由1986年开始徘徊于20多公斤。为何差别如此悬殊,除放养数量差别外,主要是成活率的差别。几年数字资料表明,试验、示范田鱼成活率草鱼都
With the continuous improvement and improvement of paddy field fish farming, the output of fish farming in paddy fields has also been on the rise. However, from a large area, the increase of output is still relatively slow. County in 1984 with the Provincial Academy of Agricultural Sciences in the trial of rice Ping fish three-dimensional planting and breeding. Demonstration of 500 acres in 1989, the average yield of 84 kilograms. However, the large-scale promotion of 10 million mu of output has been hovering in more than 20 kilograms since 1986. Why is the difference so disproportionate, in addition to stocking the number of differences, the difference is mainly the survival rate. A few years of digital data show that the trial, demonstration of fish survival rate of grass carp are