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一、试验场地与过程在乐亭县新宅镇吴庄子村边的废洼地上按“开放式”养鱼方法(见《淡水渔业》84年第一期笔者[在水源不足的盐碱滩上发展“开放式”稻田养鱼])开垦稻田34亩,其中插秧面积22亩,灌水渠及不能插秧的洼地面积12亩。使用机井水灌溉。85年4月14日向灌水渠中投放84年稻田培育的大规格鱼种2278尾,其中0.5～0.7斤的鲤鱼种60尾,0.1～0.4斤的940尾,0.05～0.09斤重的700尾,0.03～0.04斤的578尾。计重340.23斤。4月30日又投放1～2.5寸的鲤鱼春片7200尾(内混有少量的草鱼及白鲢)。6月6日至11日稻田插秧。6月18日追施碳酸氢铵30斤/亩。7月3日追施碳酸氢铵70斤/亩。3日后
I. Test Site and Process According to the “open-ended” method of fish farming in the wasteland on the edge of Wuzhuangzi Village, Xinzhai Town, Laoting County (see “Freshwater Fisheries”, Issue 84, No. 84 [I] Development on understanked saline-alkali waters “Open” ricefield fish farming]) reclaimed 34 acres of paddy fields, of which 22 acres of transplanting, irrigation channels and can not transplanting the depressions area of 12 acres. Use well water for irrigation. On April 14, 858, 2278 large-size fingerlings cultivated in paddy fields were put into irrigation channels. Among them, 60 were carp species with 0.5 to 0.7 kg, 940 from 0.1 to 0.4 kg, 700 from 0.05 to 0.09 kg, 0.03 ~ 0.04 kg of 578 tail. Weight 340.23 pounds. On April 30, there are also 7200 pieces of carp spring pieces 1 to 2.5 inches (a small amount of grass carp and silver carp mixed together). June 6 to 11 rice transplanting. June 18 topdressing ammonium bicarbonate 30 pounds / mu. July 3 ammonium bicarbonate 70 kg / mu. 3 days later