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不同年代大豆品种根干重积累动态可以用Logistic曲线方程进行模拟。在不同施肥水平下,根干重最大增长速率及出现的时间和平均增长速率有所不同。根干重最大增长速率出现的时间,中国当代品种、美国当代品种及中国20世纪20年代的品种间差异不显著,各品种间差异及施肥处理间差异也不显著。根干重最大增长速率,中国当代、美国当代及中国20世纪20年代的品种间差异不显著,各品种间差异也不显著,施肥处理间差异显著。平均增长速率,中国当代、美国当代及中国20年代的品种间差异显著,各品种间及施肥处理间差异也显著。不同施肥水平、不同生育时期,中国当代品种与美国当代品种根干重都比中国20年代品种大。
The dynamics of root dry weight accumulation of soybean varieties in different years can be simulated by Logistic curve equation. Under different fertilization levels, the maximum root dry weight growth rate and the emergence time and the average growth rate are different. The maximum growth rate of root dry weight appeared no significant difference between Chinese contemporary breeds, American contemporary breeds and Chinese breeds in the 1920s, with no significant differences among the breeds and the fertilization treatments. Root dry weight maximum growth rate of contemporary China, the United States and China in the 20th century, the 20th century, there is no significant difference between the varieties, the differences between the various varieties is not significant, significant differences between fertilization treatments. The average growth rate was significantly different between Chinese contemporary, American contemporary and China in the 1920s, with significant differences among varieties and fertilization treatments. Different fertilization levels, different growth stages, Chinese contemporary varieties and contemporary American root dry weight than the Chinese 20 years of large varieties.