The Effect of Competition Duration

Zimdahl, Robert L.

doi:10.1002/9780470290224.ch6

Cited by 14 publications

(2 citation statements)

References 92 publications

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“…Although established stands of alfalfa are fairly competitive with weeds [46], seedlings are particularly susceptible to weed competition. Weeds emerging soon after seeding could reduce alfalfa stand establishment and eventually yield [47].…”

Section: Rye Effect On Weed Suppression In Alfalfa Plotsmentioning

confidence: 99%

Allelopathic Effects of Cereal Rye on Weed Suppression and Forage Yield in Alfalfa

Adhikari¹,

Mohseni-Moghadam²,

Missaoui³

2018

AJPS

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Cereal rye (Secale cereale L.) is widely used as cover crop because of its allelopathic effects and effectiveness in weed suppression. In the Southeastern US, rye is traditionally grown for winter grazing in dormant bermudagrass pastures, where alfalfa (Medicago sativa L.) is increasingly planted as a companion crop. The effect of cereal rye on alfalfa as a succeeding crop is not known. Therefore, the objective of this study was to evaluate the effect of cereal rye on alfalfa seedling emergence, growth, forage yield, and weed suppression in field conditions. Rye was planted in the fall (mid-October) and the biomass was harvested in spring (March) followed by disking and incorporation of the remaining stubble in the soil. Alfalfa seed was planted four weeks later. The experiment design was a split-plot design with the main plots being no-rye and after-rye and the sub-plots being alfalfa cultivars. Ten alfalfa cultivars were planted in three replications after-rye and three replications with no-rye as a previous crop. In the establishment year, weed density was significantly (p < 0.01) lower in the after-rye alfalfa plots by nearly 77%. Alfalfa seedling counts were also significantly lower (p < 0.01) among the cultivars planted in the after-rye block compared to the no-rye, with a seedling count reduction between 35% and 64%. Reduction in total dry biomass yield varied from 15% to 43% among the cultivars planted in the after-rye block. The results of this study also suggest that the allelopathic effect of rye on alfalfa may not persist beyond the establishment season, but the enormous yield reduction in the first production season may constitute a costly economic penalty in terms of forage production. There was variation in the response of different alfalfa cultivars to the effect of rye residue as indicated by the variation in the magnitude of reduction in stand count and forage yield. This warrants more research in multi-location trials with and without rye in order to establish whether there is genetic variation in alfalfa germplasm in their tolerance to cereal rye allelopathy.

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Section: Rye Effect On Weed Suppression In Alfalfa Plotsmentioning

confidence: 99%

Allelopathic Effects of Cereal Rye on Weed Suppression and Forage Yield in Alfalfa

Adhikari¹,

Mohseni-Moghadam²,

Missaoui³

2018

AJPS

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“…It has been noted that in particular, alfalfa seedlings are vulnerable to weed competition, as they are not impetuous enough to compete with weeds, and this, as with many other crops, results in reduced yields (Zimdahl, 2004;Wilson, 1981).…”

Section: Introductionmentioning

confidence: 99%

The effect of weed frequency in the overall alfalfa (Medicago sativa L.) productivity, case study from Kosovo

Sherifi

Berisha

2019

AAS

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<p>Alfalfa (<em>Medicago sativa</em> L.) represents an important leguminous forage crop in farming as well as in systems of animal husbandry. It is known for its wide usage for grazing, hay, silage as well as in the form of green manure and cover crop. Our study aims to assess the influence of weeds on quality and quantity of three different aged alfalfa plots. A list of registered weed plant species divided by harvesting periods on each of the surveyed plots is offered. The biomass productivity and its correlation to the effects of artificial fertilizers, alfalfa age and the frequency of weeds are provided. We concluded that using mineral fertilizers in a controlled manner will help to reduce considerably the amount of weeds and also that alfalfa crops will be best to be replaced after four years as its productivity will start afterwards to drop sharply, whereas the number and frequency of weeds will increase conversely.</p>

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Integrated Weed Management in Plantation Crops

Singh

Sud

2014

Recent Advances in Weed Management

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The Effect of Competition Duration

Cited by 14 publications

References 92 publications

Allelopathic Effects of Cereal Rye on Weed Suppression and Forage Yield in Alfalfa

Allelopathic Effects of Cereal Rye on Weed Suppression and Forage Yield in Alfalfa

The effect of weed frequency in the overall alfalfa (Medicago sativa L.) productivity, case study from Kosovo

Integrated Weed Management in Plantation Crops

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