Dry bean competitiveness with annual weeds as affected by soil nutrient availability

Ugen, Michael Adrogu; Wien, H.C.; Wortmann, Charles S.

doi:10.1614/0043-1745(2002)050[0530:dbcwaw]2.0.co;2

Cited by 26 publications

(21 citation statements)

References 17 publications

(20 reference statements)

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“…Everaarts (1992) reported that N and phosphorus (P), but not potassium (K), application stimulated weed growth on a sandy loam soil. Similarly, Ugen et al (2002) observed greater weed growth in a non-weeded bean (Phaseolus vulgaris) crop with N and P application. Fertiliser can also favour certain weeds and therefore has the potential to shift weed species (Liebman and Mohler 2001).…”

Section: Cropping System and Fertilizer Interaction On Weed Densitymentioning

confidence: 78%

Weed species composition and density under conservation agriculture with varying fertiliser rate

Baker

Madakadze

Swanepoel

et al. 2018

South African Journal of Plant and Soil

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Conservation agriculture (CA) is a sustainable management system that optimises yield while reducing input costs. However, reduction in tillage intensity and frequency as practised under CA generally alters weed densities and composition. The objective of the study was to evaluate the effect of tillage, cropping system and fertiliser rate on weed density and diversity under CA systems compared with conventional tillage (CT). An on-station field trial with a split-plot, randomised complete block design, was used and included two tillage systems, three cropping systems and two fertiliser levels. Reduced tillage had significantly (p < 0.05) higher weed density (42 m−2) but lower weed biomass (154 g m−2) in contrast to CT with lower weed density (36 m−2) and higher weed biomass (242 g m−2). In a principal component analysis ordination, Datura ferox and Tribulus terrestris were more strongly associated with high fertiliser rate, whereas Zinnia peruviana was associated with CT. The increase in weed density and diversity under reduced tillage is likely to restrain the adoption of CA. Therefore, there is a need for alternative weed management options depending upon the weed spectrum, cropping system and fertiliser management.

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Section: Cropping System and Fertilizer Interaction On Weed Densitymentioning

confidence: 78%

Weed species composition and density under conservation agriculture with varying fertiliser rate

Baker

Madakadze

Swanepoel

et al. 2018

South African Journal of Plant and Soil

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“…The results indicated that weed growth response to CPM was not explained by K or N added (with the exception of velvetleaf). In another study, Ugen et al (2002) evaluated dry bean's competitiveness against the following annual weeds: Solanum nigrum, Bidens pilosa and Galinsoga parviflora. The results revealed that the weed nutrient uptake and growth was increased with N and P application, whereas the relative competitiveness of bean was increased further to K application.…”

Section: Referencesmentioning

confidence: 99%

Weed-Species Abundance and Diversity Indices in Relation to Tillage Systems and Fertilization

Travlos

Cheimona

Roussis

et al. 2018

Front. Environ. Sci.

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Weeds pose a major threat to world agriculture by reducing detrimentally crop yield and quality. However, at the same time, weeds are major interacting components of the agroecosystems. Abundance and diversity of weeds vary significantly among the several communities. In order to evaluate each community's structure and the interactions among them, several population indices are used as key tools. In parallel, various cultivation and land management strategies, such as tillage and fertilization, are commonly used in terms of integrated weed management. Estimating the response of weed species on those practices is crucial for both biodiversity maintenance and alternative weed control methods. Many experiments have confirmed the fundamental role of tillage intensity and nutrition supply in weed species' abundance and diversity. For instance, in some studies, the abundance of perennial weeds was doubled under reduced tillage intensity. In addition, higher values of Shannon-Weiner and Pielou indices were reported in the PK fertilization treatment compared to the control and NK fertilization treatments. The objective of this paper is to provide a brief overview of the key results of these experiments and summarize the part of the literature related to the effect of tillage systems and fertilization on weed species abundance and diversity. Such knowledge could contribute to the sound design and implementation of integrated weed management programs which in turn may lead to a decrease in the density of serious and noxious weeds and an increase in the overall balance of agroecosystems.

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“…Em relação à avaliação realizada no final da formação de propágulos, o feijão foi a espécie que apresentou o maior teor de P em seus tecidos, apenas não diferindo do encontrado para os biótipos de E. hetrophylla na dose de P de 24,00 mg dm -3 e de D. tortuosum na dose de P de 48,00 mg dm -3 (Quadro 5). Todavia, Ugen et al (2002) observaram menor concentração de P na massa seca de plantas de feijão (3,2 a 3,8 mg g -1 ) em comparação à das plantas daninhas Bidens pilosa (3,7 a 4,1 mg g -1 ), Galinsoga parviflora (4,0 a 4,8 mg g -1 ) e Solanum nigrum (4,0 a 4,5 mg g -1 ). B. pilosa e soja foram as espécies que menos concentraram P em seus tecidos.…”

Section: Resultsunclassified

Absorção e utilização do fósforo pelas culturas da soja e do feijão e por plantas daninhas

Procópio

Santos²,

Pires

et al. 2005

Rev. Bras. Ciênc. Solo

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RESUMOA aplicação de fertilizantes pode, em determinadas situações, beneficiar mais as plantas daninhas do que as próprias culturas. O manejo de fertilizantes em sistemas agrícolas pode ser um importante componente em programas de manejo integrado das culturas. O objetivo deste trabalho foi avaliar a eficiência na absorção e utilização do P pelas culturas da soja e do feijão e por espécies de plantas daninhas. O experimento foi realizado em casa de vegetação, no período de agosto a novembro de 2002. O delineamento experimental utilizado foi o de blocos casualizados com três repetições; os tratamentos originaram-se de esquema fatorial 6 x 4, sendo seis espécies vegetais: soja (Glycine max), feijão (Phaseolus vulgaris), dois biótipos de Euphorbia heterophylla (suscetível e resistente aos herbicidas inibidores de ALS), Bidens pilosa e Desmodium tortuosum; e quatro doses de P (0,00 12,00; 24,00 e 48,00 mg dm -3 ), aplicadas na semeadura sob a forma de superfosfato simples. A soja foi a espécie que revelou maior aumento na sua massa seca de raízes com o incremento do fornecimento de P. D. tortuosum, soja e B. pilosa apresentaram maior resposta à adição de doses crescentes de P em relação ao acúmulo de massa seca. O maior teor de P foi constatado para o feijão, independente da dose de P aplicada, contudo D. tortuosum foi a única espécie a ter seu teor de P aumentado em quase três vezes, quando cultivado com o dobro da dose aplicada (48,00 mg dm -3 ), com base nas necessidades da cultura do feijão. Até a avaliação realizada no início do florescimento, as plantas de soja e D. tortuosum foram as espécies que

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Dry bean competitiveness with annual weeds as affected by soil nutrient availability

Cited by 26 publications

References 17 publications

Weed species composition and density under conservation agriculture with varying fertiliser rate

Weed species composition and density under conservation agriculture with varying fertiliser rate

Weed-Species Abundance and Diversity Indices in Relation to Tillage Systems and Fertilization

Absorção e utilização do fósforo pelas culturas da soja e do feijão e por plantas daninhas

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