2004年台風15号による潮風害と水稲根活性との関係

日本作物学会紀事

金田 吉弘²  佐藤 孝²  田代 卓¹  板垣 千絵²  佐藤 敦² 

[1] 秋田県立大学短期大学部;秋田県立大学生物資源科学部

关键词: Bleeding rate;    出液速度;    Rate of dead leaf;    枯葉率;    Silicon content;    ケイ酸含有率;    Strong wind;    強風;    Typhoon 15;    台風15号;   

DOI  :  10.1626/jcs.75.204

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Typhoon 15 passed through the Sea of Japan on August 20,2004. The typhoon caused salt-wind damage on rice plants in the Sea of Japan coast part. To investigate the effect of root activity on the salt-wind damage, we examined the bleeding rate of rice plants in puddled (PD) and no-tilled (NT) paddy fields of heavy clay soil in the Hachirogata reclaimed land. The silicon contents of the bleeding sap and rice plants before the typhoon were also examined in relation to the rate of leaf death after the typhoon. The bleeding rate was higher in the NT plot than in the PD plot, suggesting higher root activity in the NT plot. Before the typhoon, the silicon contents of the bleeding sap and the leaves were higher in the NT plot than in the PD plot. After the typhoon, the rates of leaf death and leaf decoloration were lower in the NT plot than in the PD plot. The percentage of filled spikelets in the NT plot was higher than that in the PD plot. The brown rice yield in the NT plot was 49 % higher than that in the PD plot, and the ratio of the thick brown rice was also higher in the NT plot than in the PD plot. These results suggested that the higher yield in the NT plot than in the PD plot under water stress was mainly due to the high root activity that allowed the maintenance of leaf nitrogen level.

【 授权许可】

Unknown