北限地帯における水稲の生産生態に関する研究 : 第3報 苗質が乾物生産と収量に及ぼす影響

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概要

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• In this paper, the relations between the seedling characters and the dry matter production were analyzed using 31 different seedlings. The results obtained were summarized as follows ; 1. The seedling age in leaf number and the ratio of dry matter weight to plant height were the useful parameters to estimate the character of seedling. The seedling character index (SCI) was calculated using following equation : (the seedling age in leaf number) × (the ratio of dry matter weight to plant height). The dry matter weight at each stage of growing and the heading date were significantly correlated with SCI (Fig. 2, Table 1). 2. The grain yield indicated positive correlation with the percentage of ripened grains, but negative correlation with the number of grains (Fig. 3). 3. The number of grains increased with the amounts of nitrogen in rice plant at the heading time and reached to 4.4 × 10^4/m^2 in high nitrogen level. SCI indicated positive correlation with the dry matter weight but negative correlation with the nitrogen percentage content at the heading time. Therefore, the correlation between the number of grains and SCI was not significant (Fig. 4, Fig. 5). 4. The percentage of fully ripened grains to fertilized grains was determined by the ratio of the amounts of dry matter production to the number of grains and the dry matter partitioning ratio to the ear. The amount of dry matter production after the heading time and the dry matter partitioning ratio to the ear were correlated with the accumulated temperature for 40 days after the heading date (Fig. 6). 5. From these results, it may be concluded that the percentage of ripened grains was affected considerably, but the number of grains was not affected very much, by the character of seedling (Fig. 7).

• 日本作物学会の論文
• 1986-12-05

著者

• 楠谷 彰人

  北海道立北見農業試験場

• 楠谷 彰人

  北海道立中央農業試験場稲作部:(現)香川大学農学部

関連論文

• 水稲の冷温登熟性に関する研究 : 第3報 登熟に及ぼす出穂後乾物生産の影響
• 北限地帯における水稲の生産生態に関する研究 : 第3報 苗質が乾物生産と収量に及ぼす影響
• 水稲の冷温登熟性に関する研究 : 第2報 根系の登熟に対する貢献
• 水稲の冷温登熟性に関する研究 : 第1報 登熟の温度反応とその品種間差異
• 北限地帯における水稲の生産生態に関する研究 : 第2報 冷害年における収量および収穫指数の品種間差異
• 北限地帯における水稲の生産生態に関する研究 : 第1報 乾物生産過程の解析
• 128 水稲の冷温登熟性に関する研究 : 第2報 籾数ならびに完熟歩合と登熟気温との関係
• 127 水稲の冷温登熟性に関する研究 : 第1報 稔実歩合ならびに完熟歩合と根の生育との関係
• 水稲の苗および根の生育と収量との関係 : 網走地方の現地における事例から
• 水稲の冷温登熟性に関する研究 : 第4報 登熟関連形質に対する主成分分析
• F_1水稲の生産力 : 中央農試の例

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