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Weed growth and crop yield loss in wheat as influenced by row spacing and weed emergence times

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Fahad, S., Hussain, S., Chauhan, B. S., Saud, S., Wu, C., Hassan, S., Tanveer, M., Jan, A. and Huang, J. (2015) Weed growth and crop yield loss in wheat as influenced by row spacing and weed emergence times. Crop Protection, 71 . p. 101. ISSN 02612194

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Article Link: http://dx.doi.org/10.1016/j.cropro.2015.02.005

Publisher URL: http://www.sciencedirect.com/science/article/pii/S0261219415000551


Reducing crop row spacing and delaying time of weed emergence may provide crops a competitive edge over weeds. Field experiments were conducted to evaluate the effects of crop row spacing (11, 15, and 23-cm) and weed emergence time (0, 20, 35, 45, 55, and 60 days after wheat emergence; DAWE) on Galium aparine and Lepidium sativum growth and wheat yield losses. Season-long weed-free and crop-free treatments were also established to compare wheat yield and weed growth, respectively. Row spacing and weed emergence time significantly affected the growth of both weed species and wheat grain yields. For both weed species, the maximum plant height, shoot biomass, and seed production were observed in the crop-free plots, and delayed emergence decreased these variables. In weed-crop competition plots, maximum weed growth was observed when weeds emerged simultaneously with the crop in rows spaced 23-cm apart. Less growth of both weed species was observed in narrow row spacing (11-cm) of wheat as compared with wider rows (15 and 23-cm). These weed species produced less than 5 seeds plant-1 in 11-cm wheat rows when they emerged at 60 DAWE. Presence of weeds in the crop especially at early stages was devastating for wheat yields. Therefore, maximum grain yield (4.91tha-1) was recorded in the weed-free treatment at 11-cm row spacing. Delay in time of weed emergence and narrow row spacing reduced weed growth and seed production and enhanced wheat grain yield, suggesting that these strategies could contribute to weed management in wheat.

Item Type:Article
Business groups:Agriculture
Keywords:Days after wheat emergence Galium aparine Lepidium sativum Row spacing Weed emergence time Yield losses crop yield emergence evolutionarily stable strategy growth response seasonal variation weed yield response Triticum aestivum
Subjects:Plant culture > Field crops > Wheat
Science > Invasive Species > Plants > Integrated weed control
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Live Archive:18 Mar 2015 00:37
Last Modified:03 Sep 2021 16:50

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