隔月発芽試験による雑草生育期の季節的消長

スポンサーリンク

概要

• 論文の詳細を見る

• 1. Twelve kinds of annual weeds were selected to clarify the autecological characters of weeds in the fields cultivated in 1956. These weeds were planted on porcelaine germinating dishes every other month since May, and the differences of the following six stages were observed : budding stage, seedling stage, vegetating stage, flowering stage, fruiting stage and withering stage. 2. The results of these germinating tests are as follows : 1) The weeds which germinated in the early season, were remarkable in the growth of their leaves and stalks in the growth stage, and those which germinated a month later than the former were distinguishably slow in their growth, their branching and tillering declined and they became gradually dwarfed. 2) The earlier the seeds germinated, the longer their flowering period became. 3) The later the seeds germinated, the lewer the seeds were produced, depending upon the growth, branching and tillering. 3. Most of the seedlings which sprouted after August flowered, but their seeds did not ripen fully. Seedlings which sprouted after September stopped growing and most of them died in the middle of October owing to the frost. 4. From the results of the observations mentioned above, the writer is of opinion that the amount of seeds of the annual weeds sprouting after August is extremely small in Hokkaido, and the cultivating fields are not greatly influenced by the weeds sprouting after August.

• 日本生態学会の論文
• 1957-03-15

著者

• 桑原 義晴

  北海道倶知安高等学校

関連論文

• 北海道の耕地雑草
• 北海道南部地方の草原植生
• 海浜植物を主とした生活型表示方式の試み
• 北海道南部地方の耕地・耕地放棄地等にみられる雑草群落とその推移
• 隔月発芽試験による雑草生育期の季節的消長
• 北海道後志地方の農耕地に生ずる雑草生育期の季節的消長
• 北海道後志地方の馬鈴薯畑の雑草群落
• 倶知安登山口より觀た蝦夷富士の草本分布
• 倶知安面登山口より觀た蝦夷富士木本分布

スポンサーリンク