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Indian Journal of Agricultural Research
Year : 2018, Volume : 52, Issue : 1
First page : ( 61) Last page : ( 65)
Print ISSN : 0367-8245. Online ISSN : 0976-058X.
Article DOI : 10.18805/IJARe.A-295

Investigation of competitive reactions of red root pigweed (Amaranthus retroflexus L.) and corn (Zea mays L.)

Madandoust Mehdi*, Taherdoust Reza

Islamic Azad University, Fasa Branch, Fasa, Iran

*Corresponding author's e-mail: mehdimadandoust@yahoo.com

Online published on 13 March, 2018.


In order to determine the effects of density of red root pigweed on growth and physiological parameters of corn, an experiment was conducted in Faculty of Agriculture, Islamic Azad University of Fasa, located in southeastern region of Fars Province in Iran. The experiment involved the effects of various densities of red root pigweed at five levels including zero, 1, 2, 4, and 8 plants in each meter of plant row on the yield and yield components of single cross 500 corn variety, carried out in the form of complete randomized blocks design in three replications under farm conditions. The results showed that the highest yield of corn was obtained under no pigweed treatment, which had no significant difference with the treatment involving the density of one pigweed plant in each meter of planting row. The lowest yield for corn was obtained when the density of pigweed was 8 plants, which had no significant statistical difference with the treatment involving 4 plants of pigweed in each meter of planting row. Among the yield components, the highest weight of 1000 grains, the number of grains in each cob, and the number of grains in each row of corn cob were obtained under the treatment involvingno pigweed andthe lowest valuesfor these components wereobtained under thetreatment involving eightplants ofpigweed in each meterof planting row, with nosignificant differencewith the4 plant treatment.



Corn, Density, Red root pigweed, Yield.


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