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目前淡水渔业普遍存在着肥料、饵料和鱼种不足的困难,致使大规格鱼种的培育和成鱼增产都受到一定的影响。我们从挖掘水体潜力出发,利用鱼塘中的肥力,就地种植稗草和轮叶黑藻,“以青代精”,培育出大规格鱼种,取得了较好的生产效果。一、试验方法 1、鱼塘选择与稗草轮叶黑藻的种植。我们选择本所四排二号塘作为试验塘,面积1.2亩,水深60至80公分,淤泥深度15至25公分,排灌方便。5月3日移栽轮叶黑藻,行距1.3尺,株距1尺,5月18日在轮叶黑藻
At present, freshwater fisheries generally have difficulties of insufficient supply of fertilizers, feedstuffs and fish species, resulting in some impacts on the cultivation of large-size fingerlings and the increase of adult fish production. Starting from excavating the potential of water bodies, we use the fertility of fish ponds to grow barnyardgrass and hydrolysates in situ and “cultivate large-scale species with Qing Dajing” to achieve better production results. First, the test method 1, pond selection and barnyardgrass Hydrilla verticillata cultivation. We chose our No. 4 row No. 2 pond as a trial pond with an area of 1.2 mu and a water depth of 60-80 cm. The depth of the sludge is 15-25 cm, making irrigation and drainage convenient. May 3 transplanted Hydrilla verticillata, row spacing 1.3 feet, spacing 1 foot, May 18 in Hydrilla verticillata