Genotypic Variation in Ability to Recover from Weed Competition at Early Vegetative Stage in Upland Rice

• Saito Kazuki

  Graduate School of Agriculture, Kyoto University Africa Rice Center

• Phanthaboon Kamla

  Northern Regional Agriculture and Forestry Research Center

• Shiraiwa Tatsuhiko

  Graduate School of Agriculture, Kyoto University

• Horie Takeshi

  Graduate School of Agriculture, Kyoto University

• Futakuchi Koichi

  Africa Rice Center

抄録

In northern Laos, weeds are a major constraint to upland rice production in slash-and-burn systems. Two experiments were conducted to assess genotypic variation in ability to recover from weed competition at the early vegetative stage. Three traditional and two improved (IR 55423-01 and B6144F-MR-6-0-0) cultivars were grown with or without maize as an artificial weed. Maize was seeded at the same time as rice and removed at 37 d after rice sowing. The two improved cultivars out-yielded the traditional cultivars without weed competition. Larger yield loss due to the competition was associated with longer delay in days to flowering and smaller plant height at 37 d after sowing. The use of B6144F-MR-6-0-0 with high yield potential as well as strong ability to recover from weed competition appears to improve and stabilize rice productivity in this region.

収録刊行物

• Plant Production Science

  Plant Production Science 13 (1), 116-120, 2010

  日本作物学会

キーワード

• Improved cultivar
• Laos
• Recover from weed competition
• Slash-and-burn
• Traditional cultivar
• Upland rice

詳細情報

• CRID: 1390001204466420992
• NII論文ID: 130004462202
• DOI: 10.1626/pps.13.116
• ISSN: 13491008
• ISSN: 1343943X
• Web Site: http://www.tandfonline.com/doi/pdf/10.1626/pps.13.116
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可