Manipulation of rhizobia microflora for improving legume productivity and soil fertility: A critical assessment

Brockwell, J; Bottomley, Peter J.; Thies, Janice E.

doi:10.1007/978-94-011-0053-3_7

Cited by 130 publications

(119 citation statements)

References 261 publications

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“…There are a number conditions under which soils may be devoid of effective rhizobia (Brockwell and Bottomley, 1995;Peoples and Craswell, 1992) but perhaps the most common situations are those where soil factors are unfavorable for survival of sufficient numbers of rhizobia. A study of the persistence of Bradyrhizobium japonicum in farmers' fields in Australia showed that > 1,000 rhizobia per gram of soil could be detected up to 6 years after the previous soybean crop in red, acidic (pH 5.7, H20) soils, but the rhizobia failed to survive 5-6 months following wellnodulated soybean crops in grey alkaline (pH>8.0) clays so that inoculation was essential each time soybean was grown (Peoples et al, 1994b).…”

Section: Inoculationmentioning

confidence: 99%

“…direct contact ofrhizobia with acidic fertilizers such as superphosphate may effect survival), and the presence of toxic agrichemicals (Corbin et al, 1977). Even with high quality inoculant and good inoculation practice, 85 failures can occur because environmental factors influence survival of rhizobia (Brockwell and Bottomley, 1995). For example, 4-5% of a soybean inoculum was recovered from soil 24 hours after sowing at 28°C, but < 0.2% survived sowing at 38°C (Brockwell et al.…”

Section: Inoculationmentioning

confidence: 99%

“…Inoculation responses may be affected with as few as 10 to 100 rhizobia per g of soil (Singleton et al, 1992). A population of 100 indigenous rhizobia per g of soil represents 1.5 × 1011 rhizobia per ha (0-10cm), equivalent to inoculating each seed of a soybean crop with 300,000 organisms (Brockwell and Bottomley, 1995).…”

Section: Inoculationmentioning

confidence: 99%

“…Rhizobial strain selection, inoculant technology and genetic manipulation of the legume host will not be addressed since these topics have either been reviewed recently (e.g. Brockwell and Bottomley, 1994;Hardarson, 1993;Herridge et al, 1993), or are covered elsewhere in this volume (Bantilan and Johansen, 1995;Brockwell and Bottomley, 1995;Herridge and Danso, 1995).…”

Section: Introductionmentioning

confidence: 99%

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Enhancing legume N2 fixation through plant and soil management

1995

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Section: Inoculationmentioning

confidence: 99%

Section: Inoculationmentioning

confidence: 99%

Section: Inoculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Enhancing legume N2 fixation through plant and soil management

1995

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“…The magnitude and composition of indigenous rhizobia can be influenced by the trap host species or by the environmental conditions (Brockwell et al 1995). Among the environmental conditions, awareness of the legume flora that occur in the area and the nature of rhizobial partners known to associate with them might give an indication on the composition and population density of rhizobia for the introduced legume.…”

Section: Discussionmentioning

confidence: 99%

Response of Sesbania sesban (L.) Merr. to rhizobial inoculation in an N-deficient soil containing low numbers of effective indigenous rhizobia

Makatiani

Odee

2007

Agroforest Syst

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Sesbania sesban (L.) Merr. (sesbania) is a fast growing N 2 -fixing widely used as an improved fallow species by smallholder farmers in eastern and southern Africa to restore fertility of their N-deficient soils. In order to establish the need for inoculation, the population of sesbania rhizobia in soil collected from a site where the species is intended for introduction was assessed using the most probable number (MPN) plant infection assay. The MPN of sesbania rhizobia was low (21, 6-81 fiducial limits at P=0.05 g -1 soil) but with N 2 -fixation potential comparable to sesbania inoculant strain KFR 651. Evaluation of an indigenous sesbania rhizobial isolate GSS 1 from the MPN assay in potted field soil showed that it was more effective than strain KFR 651 in terms of plant growth and shoot dry matter (DM) accumulation at 9 and 12 weeks after planting, respectively. Total shoot N content was also higher for plants inoculated with isolate GSS 1 than inoculant strain KFR 651 and uninoculated control treatments 12 weeks after planting. These results demonstrate that it is better to inoculate with effective indigenous than exogenous rhizobia where the need for inoculation has been established.

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Propagation and cultivation practices of honeybush (Cyclopia spp.) for the sustainable production of an export quality indigenous South African tea

et al. 2022

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Honeybush (Cyclopia) species are endemic to the Fynbos Biome of the Cape Floral Kingdom in South Africa. Traditionally, honeybush foliage is cut, fermented, and sun-dried to make an antioxidant-rich herbal tea. Approximately 80% of honeybush is unsustainably harvested from the wild. All commercial species are indicated on the International Union for Conservation of Nature Red List of Threatened Species. Cultivation is thus required to ensure sufficient volumes of tea are produced. A major limitation to cultivation is the poor rooting responses of the species that regenerate from shoots, C. genistoides and C. intermedia, the latter being the most harvested from the wild. The establishment of clonally propagated material is a challenge for all six of the commercially important Cyclopia species. Research on honeybush has mainly focused on the unique properties contributing to flavor, medicinal value, as well as processing. Much less is known about propagation, nutrient requirements, harvesting procedures, plant improvement, and pest and disease management. This review considers management strategies for the sustainable harvesting of wild honeybush and the potential risks of introducing improved plant material. Cultivation practices and management strategies that promote longevity and enhance yield are defined. The inherent rooting ability of cuttings is discussed. Cultivated stands are mostly established by seedlings which results in diversity of vigor and tea quality. A sustainable market based on high-quality indigenous tea requires the use of clonal material which allows the selection of desired traits and rapid multiplication. Its use would enable improved yield and profitability without compromising tea quality.

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Manipulation of rhizobia microflora for improving legume productivity and soil fertility: A critical assessment

Cited by 130 publications

References 261 publications

Enhancing legume N2 fixation through plant and soil management

Enhancing legume N2 fixation through plant and soil management

Response of Sesbania sesban (L.) Merr. to rhizobial inoculation in an N-deficient soil containing low numbers of effective indigenous rhizobia

Propagation and cultivation practices of honeybush (Cyclopia spp.) for the sustainable production of an export quality indigenous South African tea

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