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以辽宁省具有代表性的28个玉米品种为试材,在5个密度下对辽宁省4个生态区的玉米生产能力进行研究。结果表明,辽北地区单位面积产量最高,辽西地区次之,辽南地区最低;适宜种植密度辽西地区最大,辽北地区次之,辽南地区最低;生物产量辽北地区最高,辽中地区次之,辽南地区最低。辽西和辽南地区经济系数较高,辽北地区最低。在不同生态区,起主导作用的产量构成因素是穗数和穗粒数,其中,辽北地区的穗数、穗粒数和粒重达到最佳,单产最高。
A total of 28 maize cultivars from Liaoning Province were used as experimental materials to study the maize productivity of four ecotopes in Liaoning Province at five densities. The results showed that the yield per unit area was the highest in northern Liaoning, the lowest in Liaoxi and the lowest in southern Liaoning. The suitable planting densities were the highest in western Liaoning, the lowest in northern Liaoning and the lowest in southern Liaoning, the highest in northern Liaoning and the second highest in Liaoning The lowest in southern Liaoning. Liaoxi and southern Liaoning higher economic coefficient, the lowest in northern Liaoning. In different ecological zones, the main yield components are the number of spikes and the number of grains per spike. Among them, spike number, grain number per spike and grain weight are the best in Liaobu area with the highest yield.