Growth Characteristics of Submerged Hill-seeded Rice (Oryza sativa L.) in Warmer Regions of Japan : Improvement of growth and yield by basal application of controlled release fertilizer at a later growth stage(Agronomy)

Japanese Journal of Crop Science

Kunji SHIMOTSUBO¹  Satoshi YOSHINAGA¹  Kohei TASAKA¹  Ken-ichi MATSUSHIMA¹  Minoru TAKEMURA¹  Kenzo WAKIMOTO¹ 

关键词: Controlled release fertilizer;    移植;    Hill-seeding;    緩効性肥料;    Nitrogen fertilizer application;    水稲;    Rice;    湛水直播;    Submerged direct seeding;    窒素施肥;    Transplanting;    点播;   

DOI  :  10.1626/jcs.71.328

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

It has been reported that hill-seeded rice, using a newly developed "Shooting hill-seeder", shows high lodging resistance and ripening ability in the warmer regions of Japan. It suggests possibility for an increase in yield by increasing the number of spikelets through an improvement of the nitrogen uptake pattern. We examined the effects of a basal application with the controlled release fertilizer appearing at a later growth stage (CFL) on the growth and yield. Hill-seeded rice under conventional fertilization showed vigorous early growth and advanced maximum-tillering stage compared with transplanted rice. These changes in growth caused yield reduction by a decrease in the total number of spikelets through a decrease in nitrogen uptake at the vegetative lag phase (VLP). On the other hand, the slower early growth rate and shorter VLP caused by the CFL application resulted in the increase in nitrogen absorption during VLP. The improvement of nitrogen uptake contributed to the increase in yield, which is equivalent to that of transplanted rice, through an increase in the total number of spikelets. Furthermore, under this type of fertilizer application, adverse effects on the lodging resistance and the nitrogen content of brown rice were not observed. These results suggest that the basal application of CFL as an improvement of fertilization would contribute to stabilize the submerged direct-seeded rice both in yield and quality.

【 授权许可】

Unknown