Some Factors Affecting the Emergence and Establishment of Rice Seedlings (Oryza sativa L.).
スポンサーリンク
概要
- 論文の詳細を見る
To examine the factors affecting the emergence and establishment of rice seedlings, we tested FAO-designated germ plasm 207 cultivars (indica rice 137 cultivars, japonica rice 56 cultivars, and unexplained ecospecies 14 cultivars) collected from throughout the world. In the first experiment, the seeds were sown in nursery soil at a seeding depth of 3.0cm. Seeded pots were kept in a greenhouse at 30/25°C for 21 days. The ratio of the established plants (REP) to total plants was measured at 21 days after seeding. As a result, 13 cultivars, 6.3% of the total tested showed the best REP, i.e., 100-80%. These include 7 indica types and 6 japonica types of rice. In the second experiment, 75 cultivars were selected as the materials. The plants were grown under the same conditions as the first experiment, but the seeding depths were 1.0 and 3.0 cm. The chlorophyll contents of the second leaf blades and REP were measured at 2 and 3 weeks after seeding, respectively. The REP showed no correlation to seed weight, whereas correlation existed between REP and the values of chlorophyll contents of the second leaf blades at 1 cm and 3 cm seeding depths 2 weeks after seeding. In conclusion, seedling establishment seemed to be affected by the rate of increase in the chlorophyll contents of the leaves.
- 日本作物学会の論文
日本作物学会 | 論文
- レイメイとキヨニシキの出葉特性に関する二, 三の知見
- 91 冷害実験装置による水稲の冷害再現試験
- 水稲機械移植栽培の作期と生育収量について
- 42 低水温処理が水稲の生育収量ならびに根の機能におよぼす影響 : 3. 不稔発生様相等に現れた苗間の差異
- 機械移植による晩植水稲の生育相 : 第2報 出穂および諸形質への影響