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观察不同栽培条件下油菜的腋芽分化特性和不同部位叶片对分枝形成的影响，结果表明：（１）主茎各腋芽由下而上依次分化，主茎腋芽分化数与叶片分化数的关系式为Ｙ＝ａ＋ｂＸ。（２）同一节位，腋芽分化的叶片越多越易成为有效分枝；节位越低成为有效分枝所需的叶片数越多．（３）主茎上部每下降一个节位分化叶片数只增加０．６９叶，越往下的腋芽越难成为有效分枝。（４）主茎上短柄叶的生长状况与分枝形成的关系最密切。（５）密度通过短柄叶、播期通过腋芽分化影响分枝形成，施肥通过上述两条途径影响分枝形成。
The results showed that: (1) The axillary buds of main stems differentiated from bottom to top, and the relationship between axillary bud differentiation numbers and leaf differentiation numbers of main stems Y = a + bX. (2) In the same node, the more axillary bud differentiated leaves, the easier it is to become an effective branch; the lower the node is, the more leaves are required to become effective branches. (3) The number of differentiated leaves in the upper part of the main stem decreased by only 0.69 folds, and the more the axillary bud fell, the more difficult it became to become an effective branch. (4) The growth of short stems on the main stem is most closely related to the formation of branches. (5) Density is affected by short axillary buds, sowing time through axillary bud differentiation affecting branching, fertilization affects branching by both pathways.