Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 37796
Title Can simulation models help design rice cultivars that are more competitive against weeds?
Author(s) Bastiaans, L.; Kropff, M.J.; Kempuchetty, N.; Rajan, A.; Migo, T.R.
Source Field Crops Research 51 (1997). - ISSN 0378-4290 - p. 101 - 111.
DOI https://doi.org/10.1016/S0378-4290(96)01046-5
Department(s) Research Institute for Agrobiology and Soil Fertility
Theoretical Production Ecology
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 1997
Abstract Differences in competitive ability between rice cultivars IR8 and Mahsuri, grown in well-fertilised irrigated conditions, were analysed by means of a mechanistic simulation model (INTERCOM) for crop-weed interaction. The analysis revealed that the greater competitive ability of Mahsuri was due mainly to a greater relative leaf area growth rate early in the season and larger maximum plant height. Comparison of experimental results and model outcomes indicated, however, that the present model is not entirely able to quantify the trade-off between competitive and yielding ability. The extent to which traits advantageous for competition may lead to increased lodging or a larger number of unproductive tillers is not quantified by the present model. This implies that use of INTERCOM for design of more competitive rice cultivars will require continuous interaction between modelling and experimentation. With those limitations in mind, the model was used to quantify the potential contribution of various attributes to competitive ability. A sensitivity analysis demonstrated that competition for light is mainly determined by morphological characteristics of which early relative leaf area growth rate, early relative height growth rate and maximum plant height were found to be the most important. The ability of the model to identify key traits with respect to competitive ability makes it a useful tool for designing rice ideotypes.
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