Utilization of Low Altitude Remote Sensing to Estimate Canopy Growth and Determine Proper Amount of Top-dressed Nitrogen in a Rice Cultivar “Yamadanishiki” for Sake Brewing

日本作物學會紀事

article

有吉 真知子¹  村田 資治¹  中島 勘太¹  金子 和彦¹  前岡 庸介¹  徳永 哲夫¹  池尻 明彦²  中野 邦夫¹  荒木 英樹³ 

[1] 山口県農林総合技術センター;山口農林水産事務所;山口大学大学院創成科学研究科

关键词: Laser-based growth sensor;    Nitrogen accumulation in plants;    Protein content of brown rice;    Proximate remote sensing;    Rice for sake brewing;    Spikelet number;    Yamadanishiki.;   

DOI  :  10.1626/jcs.90.64

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Demand of rice grains from the cultivar “Yamadanishiki” for sake brewing is increasing in Yamaguchi prefecture. However, steady supply of high quality grains is still difficult. The objectives of this study are to determine the relationship of output value S1 obtained by proximate remote sensing, with nitrogen accumulation in plants, yield, spikelet number and protein content of brown rice in “Yamadanishiki”. The analysis was carried out in rice fields with different levels of nitrogen fertilization applied at different stages and with different levels of soil fertility in 3 cropping seasons (2016–2018). The nitrogen accumulated in plants, spikelet number, and protein content of brown rice showed a positive correlation with the S1 value. From the correlation, the targeted range of S1 value at full heading was established to control spikelet number and protein content rate at proper levels. The S1 value at full heading increased with increase of nitrogen fertilizer at the panicle formation stage. Therefore, the target S1 value at full heading could be achieved by measuring the S1 value at the panicle formation stage, and by calculating and applying the proper amount of nitrogen fertilizer.

【 授权许可】

Unknown