Sowing density effect on common bean leaf area development
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Date
2016-07-25
Date Issued
ISI Journal
Impact factor: 1.550 (Year: 2016)
Authors
Ricaurte, Jose Jaumer
Michelangeli, Jose A. Clavijo
Sinclair, Thomas R.
Rao, Idupulapati
Citation
Jose Jaumer Ricaurte, Jose A. Clavijo Michelangeli, Thomas R. Sinclair, Idupulapati Rao. (Accepted on 25/7/2016). Sowing density effect on common bean leaf area development. Crop Science.
Abstract
Sowing density is a major management factor that affects growth and development of grain
crops by modifying the canopy light environment and interplant competition for water and
nutrients. While the effects of sowing density and plant architecture on static vegetative and
reproductive growth traits have been explored previously in the common bean, few studies have
focused on the impacts of sowing density on the dynamics of node addition and leaf area
development. We present the results from two sites of field experiments where the effects of
sowing densities (5, 10, 15, 20, 25 and 35 plants m
-2
) and genotypes with contrasting plant
architectures (two each from growth habits I through III) on the dynamics of node addition and
leaf area were assessed. Analysis of the phyllochron (°C node
-1
) indicated genotype and density
effects (but no interaction) on the rate of node addition. While significant, these differences
amounted to less than two days of growth at either site. In terms of leaf area development,
analysis using a power function reflected large differences in the dynamics and final size of
individual plant leaf area between the lower density (<15 plants m
used values (>20 plants m
-2
-2
) treatments and commonly
) at the growth habit, but not genotype level. These differences in
node addition and leaf development dynamics translated to marked differences between growth
habits and sowing densities in estimated leaf area indices, and consequently, in the estimated
fraction of intercepted light at lower densities.
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Rao, Idupulapati https://orcid.org/0000-0002-8381-9358