寒冷地における気温日較差が湛水直播水稲の出芽・苗立ちに及ぼす影響

日本作物学会紀事

原 嘉隆¹  古畑 昌巳² 

[1] 農研機構九州沖縄農業研究センター;農研機構中央農業総合研究センター北陸研究センター

关键词: Arrhenius equation;    アレニウス式;    Coated seed;    コーティング種子;    Cold climate area;    寒冷地;    Daily temperature range;    気温日較差;    Direct seeding in flooded paddy field;    湛水直播;    Rice;    イネ;    Seedling emergence;    出芽;   

DOI  :  10.1626/jcs.83.210

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Previously, we investigated seedling emergence and establishment of direct-seeded rice under different air temperature and daily temperature range conditions using pregerminated seeds. Our results showed that the influence of daily temperature range after seeding was greater under low than under high temperature conditions. Furthermore, the growth under low temperature conditions after seeding was promoted when the daily temperature range was wider. In the present study, we investigated seedling emergence and establishment of direct-seeded rice grown under different daily temperature ranges in low temperature conditions using calcium peroxide-coated, iron-coated, and non-coated seeds in an incubator. Calcium peroxide-coated seeds had the highest seedling emergence and establishment rates that were least influenced by the daily temperature range. In all types of seeds, the growth under low temperature conditions after seeding was better under a wider daily temperature range condition. Furthermore, seedling emergence rate estimated by the Arrhenius equation well simulated the measured value.

【 授权许可】

Unknown