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1998 Fiscal Year Final Research Report Summary

A new cultivation method, based on a concept of hydroponics, for vegetable crop production under wet lowland field conditions in Southeast Asia

Research Project

Project/Area Number 09660281
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生物環境
Research InstitutionOsaka Prefecture University

Principal Investigator

KITAYA Yoshiaki  Osaka Prefecture University, Agriculture, Associate Professor, 農学部, 助教授 (60169886)

Co-Investigator(Kenkyū-buntansha) HIRAI Hiroaki  Osaka Prefecture University, Agriculture, Assistant Professor, 農学部, 講師 (50173208)
Project Period (FY) 1997 – 1998
KeywordsHydroponics / Wet lowland / Vegetable cultivation / Sweetpotato / Carrot / Soil aeration
Research Abstract

The tuberous roots of sweetpotato and storage roots of carrot have generally showed poor growth and development in low-lying areas due to water logging or excess moisture content of the soil In the present study, the growth and development of the tuberous roots of sweetpotato and storage roots of carrot were significantly influenced by the soil aeration nuder wet lowland conditions. The present study was then, conducted to develop new techniques to improve the rhizosphere soil aeration for increasing sweetpotato and carrot production under wet lowland areas in tropical and subtropical countries.
In the result of the present study, (i) soil air composition wasimproved with providing the indigenous plant materials like rice straw, rice husk and rice husk charcoal inside the soil ridges. (ii) photosynthesis arid thus growth of sweetpotato and carrot was promoted due to lower carbon dioxide concentration in the soil and lower soil water content of the soil ridges.
It is revealed that sweetpotato and carrot production under wet lowland conditions is possible if sufficient air spaces are provided inside the soil ridges using an appropriate volume of appropriate materials, e.g. a width of 150 mm and thickness of 120 mm of rice husk charcoal applied in the unmixed mass form.
The cultivation method developed in the present study can be applied to other vegetable crops as well as sweetpotato and carrot which show poor growth under wet lowland conditions and can be utilized even in wet lowlands that have been left as wasteland.
The indigenous plant residues used in this study to improve soil aeration are easily available with low cost in tropical and subtropical countries and easily degradable materials. Therefore, this cultivation method would contribute to establish the better agro- ecosystem for sustainable agriculture.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] A.F.M.S.Islam: "Growth characteristics and yield of carrots grown in a soil ridge with a porous tube for soi aeration in a wet lowland." Scientia Horticulturae. 77. 117-124 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.F.M Saiful Islam: "Growth and yield of carrots grown in a soil ridge with a porous tube for soil aeration in a wet lowland." Scientia Horticlturae. 77. 117-124 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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