Mohsen Roshdi; Mohammad kazemalilou; Solmaz Kazemalilou
Abstract
The row spacing and planting density are important factors in yield of red bean. In this regard the effects of plant density and weed control methods on grain protein yield of red bean have been studied via a field study as a factorial based on complete randomized blocks design with three replications ...
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The row spacing and planting density are important factors in yield of red bean. In this regard the effects of plant density and weed control methods on grain protein yield of red bean have been studied via a field study as a factorial based on complete randomized blocks design with three replications at the Agricultural Research Station of Khoy during 2018. Plant density is at three levels (20, 25, and 30 plants per m2) and weed control methods are at four levels (lack of control, selective herbicide (Bentazon), general herbicide (paraquat), and manual control). Results show that the interaction effect of plant density and weed control methods has been significant on the number of lateral branches, number of pods per plant, 100-grain weight, grain yield, harvest index, and grain protein yield, though without any significant effect on the number of grain per pod. The highest number of pods per plant (26) is obtained at the density of 20 plants per m2 and manual weeding. The highest seed yield and seed protein yield, 3391 and 841 kg ha-1 belong to the density of 30 plants per m2 and manual weeding, respectively. The interference of weeds can also affect crop production quality by altering the grains composition such as protein. It can be achieved to optimum yield in red bean by increasing the competitive ability of the crop through the selection of optimal density (30 plants per m2) in combination with manual weeding.