CAJ | 학술논문

在黑龙港半干旱地区,以每公斤氮肥4元、每毫米灌水2元的成本计算,每公顷土地最大净收益为:夏玉米3 485.4元,冬小麦11 439.2元,相应的每公顷产量为:夏玉米4 943.4 kg,冬小麦8 138.8 kg,相应冬小麦灌水量为281.9 mm,这比当地实际平均灌水量高约100 mm.灌溉成本的变化对最佳灌水量影响不大.
재흑룡항반간한지구,이매공근담비4원、매호미관수2원적성본계산,매공경토지최대정수익위:하옥미3 485.4원,동소맥11 439.2원,상응적매공경산량위:하옥미4 943.4 kg,동소맥8 138.8 kg,상응동소맥관수량위281.9 mm,저비당지실제평균관수량고약100 mm.관개성본적변화대최가관수량영향불대.
In the semi-dry land of the Heilonggang Plain(Hebei Lowland Plain), the maximum net return is ￥ 3 485.4/ha for summer com and ￥ 11 439.2/ha for winter wheat under the ￥ 4/kg N-fertilizer price and ￥ 2/mm irrigation cost, the corresponding yields are 4 943.4kg/ha for corn and 8 138.8kg/ha for wheat;the wheat irrigation rate for the maximum net return under ￥ 4/kg N-fertilizer price and ￥ 2/mm irrigation cost is 281.9mm, this is almost 100mm higher than the local actual current irrigation rate for wheat; the changes of irrigation cost has little effect on the maximum net return irrigation rate; the N-fertilizer application rates for maximum net return of wheat and corn are similar to the average local current rates, but some farmers appear to be using too much N-fertilizer and some appear to be using too little.