Growth and yield response of Gossypium hirsutum to plant spacing and Trianthema portulacastrum density
2007
Anjum, F.H. (Ayub Agricultural Research Inst., Faisalabad (Pakistan). Directorate of Wheat) | Tanveer, A. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Tahir, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agronomy) | Nadeem, M.A. | Ali, A.
A field experiment was conducted for two years to study the effect of three plant spacings of cotton and five densities of carpetweed (Trianthema portulacastrum L.) on growth, yield and yield components of cotton. Cotton plant spacings were 15, 22.5 and 30 cm whereas carpetweed densities were check (weed free), 5, 10, 15 and 20 plants per square meter. Decreasing trend in leaf area index and crop growth rate of cotton was noted with increased cotton plant spacing and density of carpetweed. All weed densities caused significant reduction in sympodial branches, total number of bolls per plant, and seed cotton weight per boll compared with weed free treatment. Minimum seed cotton yield (1455 kg ha-1) was obtained at highest weed density (20 plants m-2) of carpet weed compared with maximum seed cotton yield (2274 kg ha-1) in weed free plots. Lint yields showed decreasing trend with increase in weed density.
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