国立研究開発法人 国際農林水産業研究センター | JIRCAS

Improvement in Rice Grain Quality by Deep-flood Irrigation and its Underlying Mechanisms

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

The increased occurrence of chalky rice grains as a result of global warming is becoming a serious problem. The application of deep-flood irrigation (DFI) to a water depth of 18 cm from the active tillering stage to the maximum tillering stage suppresses the occurrence of chalky grains under both high and normal temperature conditions without decreasing yields. The mechanism by which DFI reduces chalky grains was analyzed relative to carbohydrate supply as carbohydrate deficiencies have been proposed as a cause of chalky grains. DFI suppresses the occurrence of chalky grains due to the increased supply of carbohydrates to the panicles. In paddy fields where a water depth of 18 cm is not possible, such as in paddy fields with low levees or low water supplies, the combined use of moderate DFI at a water depth of 10 cm with deep planting can be substituted to produce high-quality rice. DFI did not damage root activity at the ripening stage, even in soils with a low redox potential. Although the DFI treatment slightly decreased the penetration resistance of the soil, the bearing capacity was not affected at the time of combine harvest.

刊行年月2017-04-01
作成者Masahiro CHIBATomio TERAOHajime WATANABEOsamu MATSUMURAYoshihiko TAKAHASHI
著者キーワード

chalky grains

deep planting

high temperature ripening

sink-source

公開者Japan International Research Center for Agricultural Sciences
データ作成日2017-04-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
51
2
開始ページ107
終了ページ116
DOI10.6090/jarq.51.107
権利Japan International Research Center for Agricultural Sciences
関連するリソース : J-STAGE
言語eng