Estimation of rice productivity based on synthetic aperature radar in Northeast Thailand

• Project/Area Number: 24780012
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Crop science/Weed science
• Research Institution: Kyoto University
• Principal Investigator: HOMMA Koki 京都大学, (連合)農学研究科(研究院), 講師 (60397560)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 後方散乱係数 / 水稲 / 収量 / 葉面積 / シミュレーションモデル / タイ / ラオス / インドネシア / 葉面積指数 / 国際情報交換 / 衛星観測 / 国際研究者交流 / 生産性 / 移植 / リモートセンシング / イネ

Outline of Final Research Achievements

From the aspects of food security, development of evaluation method for crop production is recommended by utilizing satellite-based remote sensing. This study tried to use synthetic aperture radar (SAR) to evaluate rice production in Thailand, Lao PDR and Indonesia, where the production varies year-to-year.
The results showed that the method based on SAR was unsatisfied to evaluate leaf area index (LAI) or yield directly. However, periodic SAR image provided key to assess rice production. Transplanting date is estimated by using SAR image in relatively accurate level, which makes it possible to estimate rice production by combining a simulation model for rice growth and yield.

Research Products

• [Journal Article] Applicability of synthetic aperture radar (SAR) to evaluate leaf area index (LAI) and its growth rate of rice in farmers’ fields in Lao PDR. (2015)
  • Author(s): Hirooka, Y., Homma, K., Maki, M., Sekiguchi, K.
  • Journal Title: Field Crops Research Volume: 176 Pages: 119-122
  • DOI: 10.1016/j.fcr.2015.02.022
  • NAID: 120005672618
  • Peer Reviewed
• [Journal Article] Estimation of rice yield by assimilating remote sensing data into crop growth model (SIMRIW-RS). (2015)
  • Author(s): Maki, M., Homma, K., Hirooka, Y., Oki, K.
  • Journal Title: Journal of Agricultural Meteorology Volume: 71
  • Peer Reviewed / Open Access
• [Journal Article] プラントキャノピーアナライザーを利用したイネの葉群動態の遺伝子型間変異に関する解析 (2013)
  • Author(s): 廣岡義弘・入江拓也・本間香貴・白岩立彦・鳥海明子
  • Journal Title: 作物研究 Volume: 58 Pages: 51-56
  • NAID: 110009646240
  • Peer Reviewed
• [Journal Article] Rice-planted area mapping using small sets of multi-remporal SAR data. (2013)
  • Author(s): Miyaoka, K., Maki, M., Susaki, J., Homma, K., Noda, K., Oki, K.
  • Journal Title: IEEE Geoscience and Remote Sensing Letters Volume: 10 Pages: 1507-1511
  • Peer Reviewed
• [Presentation] Evaluation of rice growth environment in farmers' field in Lao PDR by remote sensing. (2014)
  • Author(s): Hirooka,Y., Homma,K., Maki,M., Sekiguchi,K.
  • Organizer: 8th Asian Crop Science Association Conference (ACSA)
  • Place of Presentation: Hanoi
  • Year and Date: 2014-09-23 – 2014-09-25
• [Presentation] Development of a rice simulation model for remote-sensing (SIMRIW-RS) (2013)
  • Author(s): Koki HOMMA, Masayasu MAKI and Yoshihiro HIROOKA
  • Organizer: International Symposium on Agricultural Meteorology 2014
  • Place of Presentation: Sapporo, Japan
  • Invited
• [Presentation] Estimation of rice yield by assimilating remote sensing data into crop growth model (SIMRIW-RS) (2013)
  • Author(s): Masayasu MAKI, Koki HOMMA, Yoshihiro HIROOKA and Kazuo OKI
  • Organizer: International Symposium on Agricultural Meteorology 2014
  • Place of Presentation: Sapporo, Japan
  • Invited
• [Presentation] Evaluation on dynamics of leaf area index (LAI) of rice in farmer's fields in Vientiane Province, Lao PDR (2013)
  • Author(s): Yoshihiro HIROOKA, Koki HOMMA, Masayasu MAKI and Kosuke
  • Organizer: International Symposium on Agricultural Meteorology 2014
  • Place of Presentation: Sapporo, Japan
• [Presentation] 分光反射計測による葉群構造発達指標TIPS（Time-series change Index of Plant Structure）を用いたイネの葉面積および群落吸光係数の計測 (2013)
  • Author(s): 神林 満男, 本間 香貴, 白岩 立彦, 廣岡 義博, 牧 雅康
  • Organizer: 第235回日本作物学会講演会
  • Place of Presentation: 東京
• [Presentation] Research on detection of rice ecotypes by canopy spectral reflectance (2012)
  • Author(s): Kambayashi, M., Homma, K., Maki, M., Hirooka, Y. Shiraiwa, T.
  • Organizer: The 33rd Asian Conference on Remote Sensing
  • Place of Presentation: Pattaya, Thailand
• [Presentation] Development of SIMRIW-RS (Simulation model for rice weather relations with remote sensing) (2012)
  • Author(s): Homma, K., Maki, M.
  • Organizer: A Community of Ecosystem Services and Ecosystem Markets
  • Place of Presentation: Florida, USA
  • Invited