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1.池塘条件。池塘以长方形东西向为好(长宽比约为2.5:1),有效蓄水保持1.5~2米,面积1334~6670平方米为宜。池塘背风向阳,不渗漏,池底平坦,进排水方便。2.水源条件。养殖水必须符合GB—11607(渔业水质标准)和NY505 1(无公害食品淡水养殖用水水质标准)规定,池塘最好保持透明度在30厘米以上。同时保证水源方便,水量充足。3.养殖品种。选择以优质负类(如优质鲫负、草鱼、团头鲂、泥鳅、黄颡鱼等)为主养品种,养殖品种的选择须具
Pond condition Pond rectangular east-west as well (aspect ratio of about 2.5: 1), effective storage to maintain 1.5 to 2 meters, an area of 1334 to 6670 square meters is appropriate. Sunny leeward pond, no leakage, flat bottom, into the drainage convenience. 2 water conditions. Farming water must comply with the provisions of GB-11607 (Fishery Water Quality Standard) and NY505 1 (Water Quality Standard for Fresh-Water Aquaculture of Pollution-Free Food), and it is best that ponds maintain a transparency of 30 cm or more. At the same time to ensure convenient water supply, adequate water. 3. Breeding varieties. Select to negative varieties of high quality (such as high-quality crucian carp, grass carp, bream, loach, catfish, etc.) as the main varieties of breed, breed must choose