シチトウイの日長反応と採種に関する研究

スポンサーリンク

概要

• 論文の詳細を見る

• It is generally accepted as impossible to produce seed of Chinese matgrass under the natural conditions in Japan where the temperatures in autumn are too low. Studies were made in order to find out the possibility of seed production of Chinese matgrass by speeding up its flowering date at high temperature in summer (evading cool climate in autumn), through due photoperiodic treatment by making the best use of the responses of Chinese matgrass to photoperiodism. Effects of photoperiodic treatment on the heading date, stem growth, seed setting, and viability of seed obtained were examined. The test results can be summarized as follows: (1) Long-day (24hours) treatment promoted stem elongation. In case where long-day treatment was started in June, the promoting effect was greatest, but no heading was found in the case of long-day treatment plot. (2) Short-day (8 hours) treatment inhibited stem elongation. The inhibiting effect was remarkable in case where short-day treatment started in June was continued lasting for long days. The earlier the short-day treatment was started, the more in the number of stems per hill. Short-day treatment hastened the heading date, but the later in the start of short-day treatment, the less in the number of days from the start of treatment to the flowering date, and the more in the number of spikelets on the stems. (3) It was, after all, clarified that the seeds produced from the spikelets bearing flowers during the period ranging from mid-July to late August and collected in late September had germinating ability. Particularly, excellent seeds were produced from the spikelets bearing flowers during the period from late July to early August. For producing such excellent seeds, the short-day treatment started in early July is deemed most effective. (4) Seeds of excellent quality were 1.4 to 2.2mm in length, 0.3 to 0.5mm in width, 0.2 to 0.3mm in thickness, and about 120 mg in 1,000 grain weight.

• 日本作物学会の論文
• 1968-12-10

著者

• 中野 善雄

  広島農業短期大学

• 定平 正吉

  広島県立農業試験場い草試験地

• 定平 正吉

  広島県立農業試験場東部支場

関連論文

• イグサ品種の量的形質間の相関と経時変化
• イグサ主要品種の茎の性状について
• イグサの水管理とイグサシンムシガ発生の関係
• 広島県中北部地帯のイグサ育苗法について
• いぐさの生育と植付深及び灌がい水深の関係
• イグサの栽培法を異にした場合の収穫時期及び生育日数と茎の伸長との関係
• いぐさ春植栽培での 1 株新芽数・植付時期・収穫時期と生育・収量の関係
• いぐさの発芽分化及び発育期の温度が花序着生におよぼす影響について
• 窒素の施用時期がいぐさの先枯れにおよぼす影響について
• いぐさ本田における湛水時期がい茎の太さにおよぼす影響について
• いぐさ本田における湛水が花序着生におよぼす影響について
• イグサの育種について
• シチトウイの日長反応と採種に関する研究
• イグサの生育相と分けつ体系に関する研究 (第133回 講演会)
• いぐさの栽植様式に関する研究 (第134回 講演会)

もっと見る 閉じる

スポンサーリンク