农作物品种更新换代,推陈出新固然是好,新陈代谢也是历史发展的必然趋势,然而品种更新过快,势必导致科研成果浪费及人力、物力和财力的浪费,所以说稳定和延长农作物品种应用年限工作势在必行。科研单位推出品种多、快、早,在一定程度上推动了品种推广应用,然而也正是由于品种推出得过早、过快,品种在某些性状上经不住生产实践的考验,即使被命名,有的品种也是徒有虚名,无种植面积;有的品种经不住考验,只能是昙花一现;有的品种稳定性差,年际问差异大,早早夭折;有的品种适应性差,推而不广;有的品 The upgrading of crop varieties, innovation is certainly good, metabolism is also an inevitable trend of historical development, however, species update too fast, it will inevitably lead to the waste of scientific research and waste of manpower, material and financial resources, so that the stability and extend the application of crop varieties is likely to work years Will do. However, it is precisely because of the introduction of varieties too early, too fast, the varieties in some traits can not stand the test of production practice, even if it was Some varieties are also nominal and have no planting area. Some varieties can not stand the test and can only be short-lived. Some varieties have poor stability and inter-year differences are large and die early. Some varieties have poor adaptability and are not widely used Some products