作物生产上品种的变化是由若干因素促或的。分析研究这种变化及其影响因素,可以找出生产上存在的问题,总结经验教训,指出正确解决这种问题的方法途径。下面仅就黑龙江省近十几年来生产上一部分大豆品种的变化,加以分析,找出变化的原因及规律性的倾向,作为正确进行大豆育种工作的参考。 Variation in crop production is driven by several factors. Analysis and study of such changes and their influencing factors can identify problems existing in production, sum up experiences and lessons and point out ways and means to correctly solve this problem. The following only on the past ten years Heilongjiang Province in the production of some of the changes in soybean varieties to be analyzed to find out the reasons for the change and the tendency of regularity as a reference for the correct soybean breeding work.