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以东北地区近40年生产上应用的18个代表性品种为材料,依据育成年代分为2000年以来、20世纪90年代、80年代和70年代,研究产量及源库关系的变化特性。结果表明,随着品种改良,产量均呈增加趋势,平均每个年代增长0.841t/hm2,平均增长率为11.6%,主要是生物产量的贡献,尤其是茎鞘物质输出量的增加。现代品种在保持一定叶面积指数的基础上,通过增加库容量提高了粒叶比。
Based on the 18 representative varieties used in production in the past 40 years in northeast China, the characteristics of the relationship between yield and source and sink were studied according to the age of breeding in 2000, the 1990s, the 1980s and the 1970s. The results showed that with the improvement of varieties, the yield increased with an average of 0.841t / hm2 per year, with an average growth rate of 11.6%, mainly contributed by the biomass yield, especially the increase of stem and sheath material output. Modern varieties maintain a certain leaf area index, based on the increased capacity by increasing the grain-leaf ratio.