Is there sufficient Ensifer and Rhizobium species diversity in UK farmland soils to support red clover (Trifolium pratense), white clover (T. repens), lucerne (Medicago sativa) and black medic (M. lupulina)?

Roberts, Rachel L.; Jackson, Robert W.; Mauchline, Tim H.; Hirsch, P. R.; Shaw, Liz J.; Doring, Thomas J.; Jones, Hannah

doi:10.1016/j.apsoil.2017.06.030

Cited by 14 publications

(12 citation statements)

References 33 publications

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“…This is most important in regions without indigenous Rhizobium leguminosarum biovar trifolii populations like Latin America (Batista et al, 2015) and Australia, where the Trifolium genus is not naturally abundant (Brockwell et al, 1995). Innoculation will not be necessary in areas where this biovar is ubiquitous, for example the UK (Roberts et al, 2017). There is also evidence suggesting within Rhizobium leguminosarum biovar trifolii there are variations in the strains, some of which will nodulate RC more eff ectively than others (Miller et al, 2007), and pre-treatment with Nod factors (Rhizobial signalling chemicals) can enhance nodulation (Dominika et al, 2009).…”

Section: N Methodsmentioning

confidence: 99%

The use of red clover (Trifolium pratense) in soil fertility-building: A Review

McKenna

Cannon

Conway

et al. 2018

Field Crops Research

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Red clover cultivation made signifi cant contributions to soil fertility prior to the introduction of mineral nitrogen fertilizers. Its modern usage lies primarily in forage production, but reintegration into arable systems can enhance sustainability and preserve environmental integrity. Here we review red clovers nitrogen (N) contribution to subsequent crops, its capacity to fi x N, and how this N is transferred to subsequent crops. The senescence of the root system following cultivation also contributes to soil organic matter, providing a suite of ecosystem services which are also reviewed. Potential contributions to allelopathic weed control and how this may be utilized to improve weed control is also discussed. Red clover varieties are diverse and can be split into categories of early/late fl owering, erect/prostrate and diploid/tetraploid. This use of this diversity to diff erent ends and purposes in fertility-building and the role of plant breeding in optimizing use of genetic resources is reviewed. Management strategies are also diverse; red clover can be grown in monoculture or with companion grasses, it can be harvested for forage or green manured (which can include or omit herbicides) and the consequence of this for soil fertility is discussed. High protein forage production is also a key benefi t of red clover cultivation and the economic incentive this may provide to farmers is also reviewed.

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Section: N Methodsmentioning

confidence: 99%

The use of red clover (Trifolium pratense) in soil fertility-building: A Review

McKenna

Cannon

Conway

et al. 2018

Field Crops Research

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“…In Germany, the presence of rhizobia in soils with pH 5.9 to 6.5 was undetectable after 8 years without alfalfa, but after inoculating with strain L33 and growing alfalfa, at least 48% of the nodules were occupied by native strains (54) . In soils from 10 sites of United Kingdom with moderately acid to alkaline soils (pH 5.8 to 8.2), Roberts and others (48) showed that not all of them had strains of E. meliloti and in most of them the inoculation significantly increased the number of nodules and biomass production.…”

Section: Response Of Alfalfa To Inoculationmentioning

confidence: 97%

Rhizobium inoculants for alfalfa in acid soils: A proposal for Uruguay

et al. 2019

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Ensifer meliloti establishes symbiosis with Medicago sativa (alfalfa) and other perennial species of Medicago that grow in soils with neutral to alkaline pH, whereas Ensifer medicae makes symbiosis with annual medics adapted to moderately acid soils. The new species Rhizobium favelukesii, whose strain is LPU83, belongs to an alfalfa group of inefficient rhizobia, known as the Oregon type, initially represented by Rhizobium sp. strain Or191. R. favelukesii is considered a potential risk in the acid soils where alfalfa is grown, and could explain the inefficient nodulation observed in different countries. In acidic soils from the «Dairy Basin» of Uruguay, producers inoculate alfalfa with E. melliloti U143 strain. This edaphic condition is often marginal because the maximum potential of rhizobia-alfalfa symbiosis is not achieved at acid pH. Although Uruguay has an outstanding position in the production and use of rhizobial inoculants, the commercial strains currently used in Trifolium, Lotus and alfalfa were selected about 50 years ago in different conditions that the present ones as a consequence of: i) the displacement of cultivated pastures to other sites, ii) the sowing method, and iii) the use of new cultivars. In this review, alfalfa inoculation is analyzed in some countries and a strategy for the development of an inoculant suitable for Uruguayan acid soils is proposed. This strategy is based on the selection of efficient and competitive strains, as the first selection criteria, and persistency in soil as the second one.

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“…One of the possibilities for adaptation to the impact of drought and weather extremes, aiming to maintain quantity and quality of agricultural production, is the selection of species and varieties naturally capable of resistance to these stressors. The studied clover species do not belong in the group of highly domesticated crops for human nutrition, e.g., peas and lentils [ 16 , 17 , 18 ] in which some features such as seed dormancy and cracking of pods in legumes were lost during the process of domestication [ 19 ]. This is why a certain share of hard seeds still occurs in these crops.…”

Section: Introductionmentioning

confidence: 99%

Effect of Seed Coating and PEG-Induced Drought on the Germination Capacity of Five Clover Crops

Kintl¹,

Huňady²,

Vymyslický³

et al. 2021

Plants

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The effect of coating the seed of clover crops by water absorbing seed process (WASP) technology pelletization on its germination capacity was studied in conditions of diverse drought intensities simulated by different concentrations of polyethylenglycol (PEG) 8000 solution. Drought resistance was monitored in the seed of five fodder clover species: Anthyllis vulneraria L., Medicago lupulina L., Trifolium repens L., Melilotus albus Medik. and Onobrychis viciifolia Scop. In the seed of given plant species, germination capacity was determined along with the share of dead and hard seeds. Although the coating significantly (p < 0.05) affected the drought resistance of seeds, the germination capacity increased only in conditions of milder drought (simulation with PEG: 0.1–0.3 mol). With the increasing intensity of drought induced by higher PEG concentrations (0.4–0.7 mol) the number of germinable seeds demonstrably decreased and the number of dead seeds increased in the coated seed as compared with the uncoated seed. The coated seed can be appropriate for use in M. lupulina, M. albus and T. repens, while the uncoated seed can be used in A. vulneraria and O. viciifolia.

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Is there sufficient Ensifer and Rhizobium species diversity in UK farmland soils to support red clover (Trifolium pratense), white clover (T. repens), lucerne (Medicago sativa) and black medic (M. lupulina)?

Cited by 14 publications

References 33 publications

The use of red clover (Trifolium pratense) in soil fertility-building: A Review

The use of red clover (Trifolium pratense) in soil fertility-building: A Review

Rhizobium inoculants for alfalfa in acid soils: A proposal for Uruguay

Effect of Seed Coating and PEG-Induced Drought on the Germination Capacity of Five Clover Crops

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