Closed Transplant Production System at Chiba University

  • Changhoo Chun
  • Toyoki Kozai


A closed system for transplant production was developed at the Matsudo campus of Chiba University, in order to study biological and engineering aspects of transplant production in closed systems and to test the feasibility of closed systems for production of transplants. In this system, virus-free transplants of sweetpotato (Ipomoea batatas (L.) Lam.) are vegetatively propagated and produced under sterilized conditions. Many new concepts and technologies are applied to this system to achieve the goal: to produce high-quality transplants at minimum usage of resources, and as scheduled. In the present paper, these concepts and technologies are introduced. A few examples of studies related to transplant production in closed systems using this facility are also described.

Key index words

Artificial lighting automation production management sweetpotato 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Chun, C., T. Kozai, C. Kubota, and K. Okabe. 2000a. Manipulation of bolting and flowering in a spinach (Spinacia oleracea L.) transplant production system using artificial light. Acta Hort. 515:201–206.Google Scholar
  2. Chun, C, A. Watanabe, H.-H. Kim, T. Kozai, J. Fuse. 2000b. Bolting and growth of Spinach (Spinacia oleracea L.) can be altered by using artificial lighting to modify the photoperiod during transplant production. HortScience 35:(4) (in press).Google Scholar
  3. Hoshi, T. 1992. Objected oriented software development support system of environmental controller in plant growth factories (in Japanese with English summary and captions). J. High Technology in Agriculture 3(2): 129–136.CrossRefGoogle Scholar
  4. Islam, A.F.M.S., C. Chun, M. Takagaki, K. Sakami, and T. Kozai. 2000. Yield and growth of sweetpotato using plug transplants as affected by their ages and planting depths. In: C. Kubota and C. Chun (eds.) Proceedings for the International Symposium on Transplant Production in Closed System (in press).Google Scholar
  5. Kim, H-.H., C. Chun, T. Kozai, and J. Fuse. 2000. The potential use of photoperiod during transplant production under artificial lighting condition on floral development and bolting, using Spinacia oleracea L. as a model. HortScience 35:43–45.Google Scholar
  6. Kozai, T. 1991. Photoautotrophic micropropagation. In Vitro Cell. Biol. 27P:47–51.CrossRefGoogle Scholar
  7. Kozai, T., K. Ohyama, F. Afreen, S. Zobayed, C. Kubota, T. Hoshi, and C. Chun. 1999a. Transplant production in closed systems with artificial lighting for solving global issues on environmental conservation, food, resource and energy, Proc. of ACESYS III Conference, Rutgers University, CCEA (Center for Controlled Environment Agriculture), 31–45.Google Scholar
  8. Kozai, T., C. Kubota, S. Zobayed, Q.T. Nguyen, F. Afreen-Zobayed, J. Heo. 1999b. Developing a mass-propagation system of woody plants. In: K. Watanabe and A. Komamine (eds.) Proc. of the 12th Toyota Conference: Challenge of Plant and Agricultural Sciences to the Crisis of Biosphere on the Earth in the 21st Century”, Landes Company, 293–307.Google Scholar
  9. Kubota, C. and T. Kozai. 1995. Low-temperature storage of transplants at the light compensation point: air temperature and light intensity for growth suppression and quality preservation. Sei. Hortic. 61:193–204.CrossRefGoogle Scholar
  10. Murase, H. 2000. Microprecision irrigation system for transplant production. In: C. Kubota and C. Chun (eds.) Proceedings for the International Symposium on Transplant Production in Closed System (in press) .Google Scholar
  11. Ohyama, K. and T. Kozai. 1998. Estimating electric energy consumption and its cost in a transplant production factory with artificial lighting: A case study (in Japanese with English summary and captions). J. High Technology in Agriculture, 10:96–107.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2000

Authors and Affiliations

  • Changhoo Chun
    • 1
  • Toyoki Kozai
    • 1
  1. 1.Department of Bioproduction Science, Faculty of HorticultureChiba UniversityMatsudo, ChibaJapan

Personalised recommendations