Suppressing weed biomass as influenced by seeding rate in wheat/faba bean intercropping system – IJAAR

winter-wheat2Ibrahim Yahuza

Crops Research Unit, Department of Agriculture, the University of Reading, Reading RG6 6AR, Berkshire, United Kingdom

Key words: Weed, Wheat/faba bean intercrop, seeding rate, sulphur fertilization.

Abstract

The effect of seeding rate (sr), sulphur fertilization and intercropping on weed suppression in wheat (Triticum aestivum L.)/faba bean (Vicia faba L; bean) intercropping system is not well investigated. Field experiments were carried out to study the effects of wide sr (0-650 wheat seeds/m2; not in all experiment) in addition to the other aforementioned cultural practices on weed suppression or weed biomass. Without the application of herbicide, weeds were suppressed well at the higher wheat sr under both the conventional and organic management system. However, in three other conventional experiments when herbicide was applied these benefits were reduced substantially. Averaged across wheat sr in one-experiment weed biomasses found were 185 g/m2 and 36 g/m2 for without and with bean treatment respectively. wheat_barley_yellow_dwarf_purple_reaction_d-_hershman_kyHowever, for the combined effects of wheat sr and bean treatment, compared to the sole crop with the highest wheat sr, intercropping was poorer than sole crop in controlling weeds, in several but not all experiments. Nevertheless in one experiment at 10-wheat seeds/m2, weed biomass were 336 g/m2 and 53 g/m2 for the wheat sole crop and intercrop (40-bean seeds/m2) respectively. Thus, illustrating the practical benefits of using both sr and intercropping to suppress weeds at the lower densities. Sulphur fertilization had less effect on weed biomass. In general, this research suggests that weeds have the capacity to reduce crop resource use at the lower densities. Consequently, it is necessary to control weeds by manipulating sr and/or intercropping to allow more resources to be intercepted by the crop.

707f652ed2c2887677181a9189a02808Get the original articles in Source: Volume 2, Number 8, August 2012 – IJAAR

Journal Name: International Journal of Agronomy and Agricultural Research (IJAAR)

Published By: International Network for Natural Sciences

Related Post: Biomass yields, radiation interception and radiation use efficiency as influenced by seed rate in a cereal/legume intercropping system

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s