Identifying the effect of silica on rice production and development of silica management practices in Africa

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K21614
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Crop production science; Plant protection science
• Research Institution: Japan International Research Center for Agricultural Sciences
• Principal Investigator: TSUJIMOTO YASUHIRO 国立研究開発法人国際農林水産業研究センター, 生産環境・畜産領域, 主任研究員 (20588511)
• Research Collaborator: Razafimbelo Tantely アンタナナリボ大学, 放射線研究所, 所長 ; Rakotoson Tovohery アンタナナリボ大学, 放射線研究所, 研究員 ; Dogbe Wilson ガーナ国サバンナ農業研究所, 稲作部長
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: イネ / ケイ素 / アフリカ / 風化土壌

Outline of Final Research Achievements

Multi-location trials in this study demonstrated for the first time the positive and significant effect of silica (Si) application on rice yield on highly-weathered soils in Africa. We further identified that the Si application effect was particularly large when it was combined with N application and in upland rice fields relative to the lowland rice fields. In addition, the analysis of 299 set of grain and straw across Africa showed high correlation (R2=0.837) between Si concentration in grain and that in straw irrespective of field environments or management practices. The result suggested that the Si concentration in grain can be used an an alternative Si-deficiency indicator easier to collect and analyze than the conventional straw Si concentration.

Free Research Field

作物学