The influences of cropping system on weed communities of rice in Côte d’Ivoire, West Africa

Kent, Rebecca; Johnson, D. E.; Becker, M.

doi:10.1016/s0167-8809(01)00153-0

Cited by 44 publications

(22 citation statements)

References 2 publications

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“…and Cyperus difformis. These species also pose a problem in lowland rice in West Africa (Kent et al, 2001). Weeds compete with rice for light, nutrients, water, and other growth requirements.…”

Section: Discussionmentioning

confidence: 99%

Impact of nutrients and heavy metals capture by weeds on the growth and production of rice (Oryza sativa L.) irrigated with different water sources

Galal

Shehata

2015

Ecological Indicators

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Section: Discussionmentioning

confidence: 99%

Impact of nutrients and heavy metals capture by weeds on the growth and production of rice (Oryza sativa L.) irrigated with different water sources

Galal

Shehata

2015

Ecological Indicators

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“…van Elsen et al 2006). Recent studies were focused mainly on the effect of cultivation methods on the fl oristic composition and richness of weed communities (Kent et al 2001, Hyvönen and Salonen 2002, Chauhan 2013. Many studies have recorded basic fl oristic and vegetation data for rice crops, often focussing on their conservation value or ecological services (Barrett and Seaman 1980, Camenisch and Cook 1996, Turki and Sheded 2002, Bambaradeniya et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Spring weed communities of rice agrocoenoses in central Nepal

Nowak¹,

Nowak²,

Nobis³

2016

Acta Botanica Croatica

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-Rice fi eld weed communities occurring in central Nepal are presented in this study. The research was focussed on the classifi cation of segetal plant communities occurring in paddy fi elds, which had been poorly investigated from a geobotanical standpoint. In all, 108 phytosociological relevés were sampled, using the Braun-Blanquet method. The analyses classifi ed the vegetation into 9 communities, including 7 associations and one subassociation. Four new plant associations and one new subassociation were proposed: Elatinetum triandro-ambiguae, Mazo pumili-Lindernietum ciliatae, Mazo pumili-Lindernietum ciliatae caesulietosum axillaris, Rotaletum rotundifoliae and Ammanietum pygmeae. Due to species composition and habitat preferences all phytocoenoses were included into the Oryzetea sativae class and the Ludwigion hyssopifolio-octovalvis alliance. As in other rice fi eld phytocoenoses, the main discrimination factors for the plots are depth of water, soil trophy and species richness. The altitudinal distribution also has a signifi cant infl uence and separates the Rotaletum rotundifoliae and Elatinetum triandro-ambiguae associations. The study shows that anthropogenic rice fi elds can harbour relatively rich rush and water vegetation. More than 80 species were noted in the vegetation plots. Several of them are considered to be extremely rare and have been recorded on the world Red List.

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“…According to Kassam et al (2009), of the 106 million ha reported to be under CA worldwide, Africa contributes only 0.4 % with the majority of this being on commercial farms in South Africa. In smallholder agriculture in Africa, the principal factor limiting the area of cropped fields is the number of necessary weedings following planting (Kent et al, 2001). …”

Section: Introductionmentioning

confidence: 99%

Crop yield and weed growth under conservation agriculture in semi-arid Zimbabwe

Mashingaidze

Madakadze

Twomlow³

et al. 2012

Soil and Tillage Research

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Constraints to effective weed management may be the main reason for the small area under minimum tillage (MT) in smallholder farming in southern Africa. The effect of maize residue mulching and intensity of hand hoe weeding on the growth of weeds, cowpea (Vigna unguiculata cv. IT 86D-719) and sorghum (Sorghum bicolor cv. Macia) was investigated in the fifth and sixth years of a conservation agriculture (CA) field experiment at Matopos Research Station (28 0 30.92`E, 20 0 23.32`S). The experiment was a split-plot randomized complete block design with three replications. Tillage was the main plot factor (conventional tillage -mouldboard plough compared against MT systems -ripper tine and planting basins) and maize residue mulch rate (0, 4 and 8 t ha -1 ) the sub-plot factor. Hoe weeding was done either four times (high weeding intensity) or twice (low weeding intensity) during the cropping season. Planting and weeding were done at the same time in all treatments. There was markedly greater early season weed growth in MT systems relative to mouldboard plough (MBP) in both crop species. In sorghum, MT (planting basins: 40.3 kg ha -1 ; ripper tine: 34.8 kg ha -1 ) systems had higher cumulative weed biomass measured after planting than MBP (29.9 kg ha -1 ) system. Maize mulching was generally associated with increased mid-to late-season weed growth in the two crops probably due to improved soil moisture conservation during periods of low precipitation. Weed suppression by the maize mulch was observed only in sorghum and limited to early in the cropping season with no effect observed for the remainder of the sorghum rotation phase. The high weeding intensity treatment had lower weed growth in both crops and better sorghum yield than low weeding intensity. The MT systems had poor crop establishment which translated into low yields. Cowpea grain yield obtained from MT systems was less than 300 kg ha -1 compared to 413 kg ha -1 in MBP. The poor sorghum establishment in MT systems translated into low grain yield as

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The influences of cropping system on weed communities of rice in Côte d’Ivoire, West Africa

Cited by 44 publications

References 2 publications

Impact of nutrients and heavy metals capture by weeds on the growth and production of rice (Oryza sativa L.) irrigated with different water sources

Impact of nutrients and heavy metals capture by weeds on the growth and production of rice (Oryza sativa L.) irrigated with different water sources

Spring weed communities of rice agrocoenoses in central Nepal

Crop yield and weed growth under conservation agriculture in semi-arid Zimbabwe

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