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Ecological Studies on Crop Community Cultivated under the Intercropping Systems.

Research Project

Project/Area Number 63560017
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 作物
Research InstitutionCollege of Agriculture & Veterinary Medicine, Nihon University

Principal Investigator

HIROSE S  Col. of Agri.& Vet. Med. Nihon Uni. Prof., 農獣医学部, 教授 (00102517)

Co-Investigator(Kenkyū-buntansha) MURAI M  Col. of Agri.& Vet. Med. Nihon Uni. Full time lecturer, 農獣医学部, 専任講師 (00166240)
TERASAWA T  Col. of Agri. Nihon Uni. Assistant Prof., 短期大学部農業科, 助教授 (30060255)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1989: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1988: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCrop community / Crop growth rate / Intercropping / Land equivalent / Leaf area index / Light extinction coefficient / Net assimilation rate / 層別刈取り法 / 吸光係数 / 受光態勢 / 層別刈取り / 葉面積指数
Research Abstract

The studies were carried out to elucidate the ecological characteristics of crop community grown under the various intercropping systems, and effects of the intercropping arrangement of maize, sorghum, and soybean on crop yields were also investigated over a 3-year period.
1. In the intercroppings including maize, sorghum, and soybean, light was a factors which played a important role, because with the decrease of light available in the canopy of each component crop, net assimilation rates, and leaf area indices and consequently crop growth rates decreased at the flowering and ripening stages.
2. There was a negative correlation between light extinction coefficient (K) and leaf area indices at the mid flowering or ripening stages. K value increased commonly under the intercropping conditions in showing the deterioration in light intercepting characteristics, however dense cropping was supposed to bring the decrease of K value by making the leaves more upright.
3. Three types of inter-species competition were observed by comparing the yields of each component crop cultivated in the intercropping and sole cropping, that is, mutual cooperation, mutual inhibitation, and compensation.
4. Land equivalent ratios were used to compare the productivity of the intercropping and sole cropping, and they were considerably high, showing more than 1.10 in the intercropping. This means that the intercropping gave more yields than the sole cropping.
5. Some characters of soybean such as number of pods per plant and internode length were significantly reduced when soybean was intercropped with maize and sorghum. However, a less percentage of grains damaged by pod borer was found in the intercropping.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Miguel A.Espinoza,広瀬昌平,寺澤輝雄,村井正之: "間混作条件下における作物生態の研究" 日本作物学会紀事. 57巻別2. 161-162 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] 寺澤輝雄,広瀬昌平,村井正之: "混作条件における作物群落構造に関する研究" 日本作物学会紀事. 58巻別2. 73-74 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Espinoza, M. A., S. Hirose, T. Terasawa, & M. Murai.: "Ecological Characteristics on Crop Community Cultivated under the Intercropping System." Jap. Jour. of Crop Sci. 57(Ex. 2), 161-162, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Terasawa, T., S. Hirose, & M. Murai.: "Studies on Crop Community Structure in the Intercropping system." Jap. Jour. of Crop Sci. 58(Ex. 2), 73-74, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Miguel A.Espinoza,廣瀬昌平,寺澤輝雄,村井正之: "間混作条件下における作物生態の研究" 日本作物学会紀事. 57巻別2. 161-162 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] 寺澤輝雄,廣瀬昌平,村井正之: "混作条件における作物群落構造に関する研究" 日本作物学会紀事. 58巻別2. 73-74 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Miguel,;A.Espinoza.;広瀬昌平、寺澤輝雄、村井正之: 日本作物学会紀事. 57. 161-162 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] 広瀬昌平、寺澤輝雄、村井正之: 日本作物学会紀事. 58. (1989)

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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