关于良种繁育的探讨河南省南阳农校（４７３０５５）刘学南方丽孙廷我国自５０年代以来，农作物良种繁育一直沿用“三圃制”的方法。这种方法，在一定的历史条件下对农业生产的发展起过积极作用。但是，随着农业生产的发展和科学技术的提高，以及对遗传学的深入研究，有必... About Nongyang NongYang School of Henan Province (473055) Liu XueNan FangLi SunTing Since the 1950s, the breeding of crop varieties has been using the method of “San Pu system”. This method has played a positive role in the development of agricultural production under certain historical conditions. However, with the development of agricultural production and the improvement of science and technology, as well as the in-depth study of genetics, it is necessary ...