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以3个玉米杂交种为试验材料,在不同种植密度下研究玉米植株穗分化过程中雌幼穗和茎秆的生长动态与每穗小花数的关系。结果表明:穗分化与茎秆等各器官具有同伸关系。雌穗分化前期,幼穗生长缓慢,茎秆开始加速生长;性器官形成期幼穗生长加速,穗重、茎重与每穗小花分化数呈正相关,穗重增长率与茎重增长率之比也与每穗小花分化数呈正相关,且都随密度增大而减少。
Three maize hybrids were used as experimental materials to study the relationship between the growth dynamics of young ears and stems and the number of florets per spike during the ear differentiation of maize plants at different planting densities. The results showed that spike differentiation and stems and other organs have the same relationship. At the early stage of ear differentiation, panicle growth was slow and stalk began to accelerate. Ear growth, spike weight and stem weight were positively correlated with flower number per spike, and the ratio of panicle weight to stem weight increased And flower spikelets per spike was positively correlated, and all decreased with increasing density.