随着农村多种经营的发展，社会经济日益活跃，农民致富的途径越来越多，秋冬季节，正是农民积极开发荒滩荒水、改 低产稻田为鱼塘的大好时机。这些新开鱼 塘中，有相当一部分底质差，是红、黄、 沙质底，生活在池中的鱼群，往往活动力 差，食欲不振，生长缓慢，抗病力弱，易 发 With the development of diversified industries in rural areas, the social economy is becoming more and more active. There are more and more ways for farmers to get rich. In autumn and winter, it is a golden opportunity for farmers to actively develop wasteland and wasteland and reduce the production of rice fields to fish ponds. These newly opened fish ponds, a considerable part of the poor quality, red, yellow, sandy bottom, living in the pool of fish, often poor activity, loss of appetite, slow growth, disease resistance is weak, easy to fat