Simulation of Competition for Photosynthetically Active Radiation Between Common Ragweed (Ambrosia artemisiifolia) and Dry Bean (Phaseolus vulgaris)
- 1 September 1996
- journal article
- weed biology-and-ecology
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 44 (3), 545-554
- https://doi.org/10.1017/s0043174500094315
Abstract
The influence of weeds on crop yield is not only dependent on weed-related factors such as density and time of emergence, but also on environmental and management factors that affect both the weed and crop through time. This study was undertaken to develop the first physiologically based dry bean model that would account for the influence of weed competition. The specific objective was to develop a model that would account for the influence of weed competition on crop yield, and to use this model to test the hypothesis that crop yield losses resulted from competition for photosynthetically active radiation (PAR). To this end, a model that simulated the growth and development of dry bean was developed. The model performed daily calculations and simulated the phenology, leaf area expansion, dry matter production and distribution, and grain yield of dry bean based on weather and management information, but assumed adequate water and nutrients. The model was calibrated without weed competition at two locations and yr, and for these situations, adequately described the growth and development of the crop. Simulations were then run for five common ragweed densities and two times of emergence. Common ragweed leaf area was read into the model from input files and used to simulate weed shading. Shading of the dry bean canopy by common ragweed accounted for about 50 to 70% of the yield losses observed in field studies when weeds emerged with the crop. Weed shading did not account for the yield reduction measured from weeds that emerged at the second trifoliate stage of crop growth. The agreement between model predictions and field studies was consistent with the hypothesis that competition for PAR was a principal factor in weed-crop interaction. The ability to account for differences in weed densities, management, and environmental conditions suggested that modeling was a useful tool for evaluating the interaction among weeds and crops.Keywords
This publication has 32 references indexed in Scilit:
- Evaluation of three empirical models depicting Ambrosia artemisiifolia competition in white beanWeed Research, 1995
- Effect of tillage practice and planting pattern on performance of white bean (Phaseolus vulgaris L.) in OntarioCanadian Journal of Plant Science, 1994
- Using canopy attributes to evaluate competition between Sorghum halepense (L.) Pers. and soybeanWeed Research, 1994
- Influence of interference from a mixed weed species stand on soybean (Glycine max (L.) Merr.) growthCanadian Journal of Plant Science, 1993
- Soybean yield and yield components as influenced by canopy heights and duration of competition of velvetleaf (Abutilon theophrasti Medik.)*Weed Research, 1991
- Competition for light between velvetleaf (Abutilon theophrasti) and soybean (Glycine max)Weed Research, 1990
- SOYWEED: A Simulation Model of Soybean and Common Cocklebur Growth and CompetitionAgronomy Journal, 1990
- Germination and Emergence Response of Common and Tepary Beans to Controlled Temperature1Agronomy Journal, 1987
- Effects of Shading on the N2‐Fixation, Yield, and Plant Composition of Field‐Grown Soybeans1Agronomy Journal, 1978
- Effects of day length on the morphology and flowering of five determinate varieties of Phaseolus vulgaris L.The Journal of Agricultural Science, 1968