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采用田间试验方法研究有、无花瓣油菜花期前后的株型演变及其与成熟期株型结构的关系。结果表明，无花瓣油菜花期缺少花瓣，植株中、下部受光充足，光合产物多，形成低分枝、多分枝、结角层厚、角果多的大株型。有花瓣品种宁油７号花瓣影响透光，下部分枝退化多，形成高分枝、少分枝、结角层薄、角果少而集中的较小株型。还研究了株型质量问题。
The field experiment was used to study the evolution of plant type before and after flowering with and without petal and its relationship with plant type and structure at maturity. The results showed that the petals of the petals rape were lack of petals at the flowering stage, while the plants were well-lit at the middle and lower parts of the plant, with more photosynthetic products, forming a large plant with low branching, multi-branching, thick horny layers and more horny fruits. A petal varieties Ningyou 7 petals affect the light transmission, the lower part of the degeneration and more to form a high-branched, less branched, the angle of the thin, less concentrated and smaller Kok plants. Also studied the type of plant quality problems.