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乐亭县畜牧水产局工程师刘天国同志在新塞镇吴庄子村与吴连革等七人,在多年废弃的坑洼地上进行开放式稻田养鱼高产试验,获得鱼米双丰收。插秧稻田22亩,沟渠及不能插秧的坑洼12亩,主环沟及大埝2亩,总面积为36亩。收各种鱼1933公斤,平均亩产53.5公斤,回捕率为85%。其中250克以上的成鱼667.25公斤,占44.8%,平均每尾重440克;250克以下的鱼种1065.75公斤,平均每尾重175克。成鱼按每斤2元,价值3469元,鱼种按每斤6元,价值12789元,扣除开支4031.13元(买鱼种2400元,饵料1631.13元),养鱼纯收入12226.87元。据观察,水稻根部有部分老叶被鱼吃掉,有利通风透光,水稻长势良好。据测算,平均亩产稻谷400公斤。该试验获唐山市科技成果四等奖。
Laoting County Animal Husbandry and Fisheries Engineer Liu Tianguo comrades in the town of Wuzhuangzi and Wu Liange seven people, in many years abandoned potholes in open rice high-yielding test of fish farming, access to bumper harvest of fish and rice. 22 acres of transplanting rice fields, canals and ditch can not transplanted 12 acres, the main ring ditch and 2 acres of Dazhu, with a total area of 36 acres. 1933 kg of various kinds of fish, with an average yield of 53.5 kg and a recovery rate of 85%. Among them, more than 250 grams of adult fish 667.25 kilograms, accounting for 44.8%, an average of 440 grams per tail; fish weighing 250 grams of 1065.75 kg, an average of 175 grams per tail. Into the fish 2 yuan per catty, the value of 3469 yuan, 6 yuan per catty fish species, the value of 12789 yuan, net of expenses 4031.13 yuan (2,400 yuan to buy fish species, food 1631.13 yuan), fish net income 12,226.87 yuan. It is observed that some of the old roots of rice are eaten by fish, which is beneficial to the ventilation and light. The rice grows well. It is estimated that the average yield of rice 400 kg. The test won the fourth prize of scientific and technological achievements in Tangshan City.