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河北省水产研究所研制成淡水鱼尿素颗粒饲料,对饲养荷元鲤效果尤好,对本地鲤、草鱼等饲养效果也较好。其配方为:黑豆饼30斤、尿素10斤、麦麸20斤、玉米面10斤、小麦芽10斤、土面10斤、糠糟、塘泥10斤、猪血粉2斤、食盐2斤、畜用土霉素100～150克、氯化钴10—15克,经发酵后提高了蛋白质的含量,可解决饲料蛋白需要的50％。这种饲料每斤成本约0.15
Hebei Province Institute of Fisheries developed into freshwater fish urea particles feed, the effect of feeding Dutch carp better, on the local carp, grass carp and other feeding effect is better. The formula is: black bean cake 30 pounds, urea 10 pounds, 20 grams of wheat bran, corn flour 10 pounds, 10 pounds of wheat sprouts, 10 kg of soil surface, rice bran, 10 pounds of mud, 2 pounds of pig blood, 2 pounds of salt, With oxytetracycline 100 ~ 150 grams, 10-15 grams of cobalt chloride, after fermentation to improve the protein content, can solve the feed protein needs 50%. This feed costs about 0.15 per catty