水稲収量の成立原理とその応用に関する作物学的研究 : 第89報 各種の気温・水温条件下で育成した苗の各種の気温・水温条件下での活着良否について (2) 葉令が同一の苗を移植した場合
スポンサーリンク
概要
- 論文の詳細を見る
Growing the rice seedlings under the conditions of all possible combiations of air-temperatures (16, 21, 31, and 36℃) and water-temperatures (16, 21, 31 and 36℃) up to the age of 6.5 in leaf-number, and transplanting those seedlings again under the same various temperature conditions mentioned above, the authors investigated (a) the number of roots newly emerged, (b) the length of roots newly elongated, (c) number of dead leaves and (d) the number of leaves newly emerged on the main stem at the time of 10 days after transplanting, and furthermore examined the most suitable temperature conditions for both production of seedings with high rooting activity and vigorous rooting in the rooting period after the transplanting. 1) In the seedling period the air-tempertures suitable for vigorous root development were 21℃, 31℃ and 36℃, and the water-temperature suitable for increasing the number of roots was 31℃ and that suitable for elongation of root length was 16℃. In the rooting period the water-temperature had much more powerful effect on root development than the air-temperature and the water-temperature for increasing the number of roots was 36℃ and that suitable for elongation of root length was 31℃ 2) The seedlings grown under low air-temperatures and low water-temperatures had few-number of dead leaves after transplanting, and low air-temperature and high water-temperatures in the rooting period served for decreasing the number of dead leaves after transplantig. 3) The temperature conditions in the seedling period had little effect on emergence of new leaves on the main stem, while the water-temperature in the rooting period had a great effect on it and the water-temperature of 31℃ was most suitable for increasing the number of new leaves on the main stem. 4) The temperature condition of the combination of the air-temperature of 21℃ and the water-temperature of 16℃ was liable to produce the seedlings which showed the most favourable result in rooting, as far as the four studying items on rooting activity mentioned above were concerned, in any temperature condition in the rooting period, and in the second place that of the air-temperature of 16℃ and the water-temperature of 16℃ followed. These facts suggested that the low temperature such as 16℃ was quite necessary to raise strong and healthy seedlings. 5) The combination of the air-temperature of 21℃ and the water-temperature of 31℃ in the rooting period was liable to let every seedling show the most fovourable result in rooting on all the four items concerning rooting activity mentioned above, and in the second place that of the air-temperature of 31℃ and the water-temperature of 31℃ followed.
- 日本作物学会の論文
- 1969-06-30
著者
-
松島 省三
日本工営株
-
星野 孝文
農業技術研究所
-
松島 省三
農林省農業技術研究所
-
富田 豊雄
農業生物資源研究所
-
富田 豊雄
農林省農業技術研究所
-
星野 孝文
農林省農業技術研究所
-
定金 章
岡山県庁
関連論文
- 水稲収量の成立原理とその応用に関する作物学的研究 : 第90報 稲群落の姿勢と光-同化曲線との関係
- 3 熱帯における低コスト水稲湛水直播の実際的研究 : 第15報:新湛水直播法の設定とそれによる多収穫への挑戦
- 2 熱帯における低コスト水稲湛水直播の実験的研究 : 第14報:均平精度が成苗率と収量に及ぼす影響
- 1 熱帯における低コスト水稲湛水直播の実際的研究 : 第13報:湛水直播における適正播種量
- 20 熱帯における低コスト水稲湛水直播の実際的研究 : 第12報:再生分げつの生産性向上に関する研究
- 19 熱帯における低コスト水稲湛水直播の実際的研究 : 第11報:発芽時の落水処理が成苗歩合に及ぼす影響
- 19 熱帯における低コスト水稲湛水直播の実際的研究 第10報 : 水深が成苗歩合に及ぼす影響
- 18 熱帯における低コスト水稲湛水直播の実際的研究 第9報 : 種子の新鮮度が成苗歩合と収量に及ぼす影響
- 17 熱帯における低コスト水稲湛水直播の実際的研究 第8報 : 水管理が窒素吸収力に及ぼす影響
- 16 熱帯における低コスト水稲湛水直播の実際的研究 第7報 : 多収穫用品種試験および施肥量試験