抄録
The authors investigated the development of auxiliary buds in rape plants grown under the conditions of (1) deep snow, (2) 1ittle snow, (3) glass house, (4) covering by box and (5) long day-light. The results were as follows : 1. On the l∼10th nodes : Auxiliary buds did not develop under those conditions. 2. On the 11∼20th nodes : Most of auxi1iary buds were impposible to develop but a few developed to branches setting many pods under the conditions (5) and (2). 3. On the 21∼30th nodes: Buds develop to largest branch under the condition (5). and succeded by (2), (4), (3) respectively, and the poorest by (1). 4. On the 3lth and higher nodes : The similar tendency to the 21∼30th nodes was obtined.
