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PREDICTING NURSERY GROWTH AND TRANSPLANTING SHOCK IN RICE

Published online by Cambridge University Press:  02 January 2001

MOIN U. SALAM ,
JAMES W. JONES  and
KAZUHIKO KOBAYASHI
MOIN U. SALAM
Affiliation:
National Institute of Agro-Environmental Sciences (NIAES), 3-1-1 Kannondai, Tsukuba, Ibaraki 305-8604, Japan A part of this study was carried out at the Department of Agriculture and Biological Engineering, University of Florida, Gainesville, Florida, USA, when the senior author was working as a Visiting Associate Professor. Stationed at NIAES as a recruited staff member of the Japan Science and Technology Corporation (JST).
JAMES W. JONES
Affiliation:
National Institute of Agro-Environmental Sciences (NIAES), 3-1-1 Kannondai, Tsukuba, Ibaraki 305-8604, Japan A part of this study was carried out at the Department of Agriculture and Biological Engineering, University of Florida, Gainesville, Florida, USA, when the senior author was working as a Visiting Associate Professor. Department of Agriculture and Biological Engineering, University of Florida, Frazier Rogers Hall, PO Box 110570, Gainesville, FL 32611-0570, USA
KAZUHIKO KOBAYASHI
Affiliation:
National Institute of Agro-Environmental Sciences (NIAES), 3-1-1 Kannondai, Tsukuba, Ibaraki 305-8604, Japan A part of this study was carried out at the Department of Agriculture and Biological Engineering, University of Florida, Gainesville, Florida, USA, when the senior author was working as a Visiting Associate Professor.
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Abstract

Seedling growth in the nursery and the magnitude of shock experienced by the seedlings after transplanting can affect subsequent growth and development of transplanted rice (Oryza sativa). These two processes have not been adequately represented by rice growth simulation models. In this study, seedling growth in the nursery was described with respect to endosperm mobilization, dry matter (DM) distribution and seed size. In addition, the transplanting shock process was represented describing the crop development and growth in relation to seedling age at transplanting. These relationships, as two sub-models, were incorporated into CERES-Rice, a rice growth model, and their performances compared with independent field data. The nursery growth sub-model was also evaluated with another model, RIBHAB. Results of the comparison showed that the nursery growth sub-model, either with CERES-Rice or RIBHAB, closely predicted observed seedling growth. On the other hand, CERES-Rice overestimated root and leaf DM and underestimated culm DM, while RIBHAB underestimated all the growth traits considered in the evaluation. Transplanting shock period predicted by the sub-model closely mimicked observation, whereas CERES-Rice highly overestimated it. It is concluded that the developed nursery growth and transplanting shock sub-models can be incorporated into CERES-Rice and other rice growth models for better simulation of those growth processes.

Type
Research Article
Information
Experimental Agriculture , Volume 37 , Issue 1 , January 2001 , pp. 65 - 81
Copyright
© 2001 Cambridge University Press

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