我国长期沿用的农作物良种繁育方法“三圃制”,存在许多弊端,已不适应农业发展形势的需要。在多年农作物良种繁育实践中研究总结出的“四级种子生产程序”,能有效地保持优良品种纯度和种性。节约种源,减少世代,有利于实现种子标准化,延长使用年限。经济简便,解放了生产力。使育、繁、推一体化,形成了合力。该方法以现代遗传学作为理论基础。几年来,已迅速在河南省大部分地市推广应用,效益显著。 There are many drawbacks in the “three-garden system” for the long-term crop seed breeding method in our country and it is no longer suitable for the needs of the agricultural development. In the practice of many years of crop seed breeding concluded that the “four-stage seed production process” can effectively maintain the purity and species of fine varieties. Conservation of provenance, reduce generation, is conducive to the standardization of seeds, to extend the useful life. The economy is simple and has liberated the productive forces. Educate, multiply, push integration, formed a joint force. The method uses modern genetics as a theoretical basis. Over the past few years, has been rapidly applied in most cities in Henan Province, the application of significant benefits.