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  • 1
    Electronic Resource
    Electronic Resource
    Comparative growth and symbiotic performance of four Acacia mangium provenances from Papua New Guinea in response to the supply of phosphorus at various concentrations (1995)
    Springer
    Biology and fertility of soils 19 (1995), S. 60-64 
    Details
    ISSN: 1432-0789
    Keywords: Acacia mangium ; P fertilization ; Root nodulation ; N2 fixation ; Acetylene reduction assay
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Plant growth performance, the P content in root and nodule tissues, and nodulation and N2-fixing ability were studied in four provenances of Acacia mangium from Papua New Guinea following different levels of P fertilizer application. A. mangium did not seem to need high levels of P for growth and N2 fixation. The response by this leguminous tree to the P supply varied significantly according to provenance and to P concentrations in the culture solution. The provenances of A. mangium were classified into three types according to their P response: (1) Growth performance, nodulation, and N2 fixation of plants were stimulated as concentrations of P increased (provenance PH 482); (2) the maximal effect of P on plant growth was found only at P concentrations higher than 500 μM (provenance PH 484); and (3) the plant response to P fertilization was low, even with nutrient solutions containing P concentratins higher than 500 μM (provenances PH 483 and PH 485). Provenance PH 483 was distinguished by its low nodulating ability. However, this provenance grew well, probably because of its high N2 fixation efficiency as expressed by specific acetylene reduction activity and its high P content in nodule tissues. Therefore, in certain cases, these two parameters may be useful criteria in selecting leguminous plants for field use. Statistical analyses of the study results showed that the effect of the factor P supply on N2 fixation efficiency and nodule development was only significant at P concentrations lower than 250 μM whereas the effect of the factor plant provenance was significant regardless of the P concentration used. This observation emphasizes the value of provenance screening in the identification of plants for use in a wide range of soil types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336348
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen-fixing potential of Acacia mangium and Acacia auriculiformis seedlings inoculated with Bradyrhizobium and Rhizobium spp. (1990)
    Springer
    Biology and fertility of soils 9 (1990), S. 261-267 
    Details
    ISSN: 1432-0789
    Keywords: Acacia mangium ; Acacia auriculiformis ; Bradyrhizobium spp. ; Rhizobium spp. ; Nitrogen fixation ; Nodule efficiency ; Tree legumes ; Agroforestry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Two Australian Acacia species, A. mangium and A. auriculiformis were inoculated in vitro with eight strains of Bradyrhizobium spp. and two strains of Rhizobium spp. On the two plant species, only Bradyrhizobium spp. strains formed effective N2-fixing nodules. A. mangium, which nodulates effectively with a restricted range of Bradyrhizobium spp. strains, is a specific host compared to A. auriculiformis. A. auriculiformis is assumed to be a promiscuous host because it nodulates effectively with a wide range of Bradyrhizobium spp. strains. Nodule efficiency as expressed by the ratio of N2 fixed to nodule dry weight appeared to be higher in A. auriculiformis (0.44–0.81) than in A. mangium (0.23–0.55).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336237
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  • 3
    Electronic Resource
    Electronic Resource
    A new approach to enhance growth and nodulation of Acacia mangium through aeroponic culture (1997)
    Springer
    Biology and fertility of soils 25 (1997), S. 7-12 
    Details
    ISSN: 1432-0789
    Keywords: Key words Aeroponic culture ; N2-fixation ; Acacia mangium ; Bradyrhizobium spp. ; Hypernodulation ; Tree saplings ; Imperata cylindrica
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract This work was designed to determine whether a plant culture method on non-solid media could be used as an alternative for inoculation of Acacia mangium with selected strains of Bradyrhizobium spp. A. mangium seedlings were grown and inoculated with Bradyrhizobium strain Aust13c and strain Tel2 in hydroponics, aeroponics and sand. Aeroponics was found to be the best system of the three, allowing the production of tree saplings 1 m in height after only 4 months in culture. Moreover, compared to plants grown in liquid or sand media, aeroponically grown saplings inoculated with Bradyrhizobium spp. developed a very high number of small nodules distributed all along the root system, resulting in an increase in nitrogen and chlorophyll content in plant tissues. We propose aeroponics as an alternative method to classical soil inoculation procedures for the production of hypernodulated legume tree saplings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050272
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  • 4
    Electronic Resource
    Electronic Resource
    Activité antimicrobienne deCandida hordei De Miranda etDiem (1975)
    Springer
    Cellular and molecular life sciences 31 (1975), S. 927-929 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A new species of yeast,Candida hordei De Miranda andDiem, is able to produce an antibiotic which kills and lyses diverse microorganisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02358856
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  • 5
    Electronic Resource
    Electronic Resource
    Inoculation withGlomus mosseae improves N2 fixation by field-grown soybeans (1985)
    Springer
    Biology and fertility of soils 1 (1985), S. 15-23 
    Details
    ISSN: 1432-0789
    Keywords: Glomus mosseae ; Soybean ; Inoculation ; A value method ; Senegal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A field study carried out in a sandy, relatively acid Senegalese soil with a low soluble P content (7 ppm) and low vesicular-arbuscular mycorrhizal (VAM) populations showed that soybean responded toGlomus mosseae inoculation when the soluble P level in the soil had been raised by the addition of 22 kg P ha−1. In P-fertilized plots, N2 fixation of soybean, assessed by the A value method, was 109 kg N2 fixed hat when plants were inoculated withRhizobium alone and it reached 139 kg N2 fixed ha−1 when plants were dually inoculated withRhizobium andGlomus mosseae using an alginate bead inoculum. In addition to this N2 fixation increase (+28%),Glomus mosseae inoculation significantly improved grain yield (+13%) and total N content of grains (+16%). This success was attributed mainly to the low infection potential of the native VAM populations in the experimental site. In treatments without solubleP or with rock phosphate, no effect of VAM inoculation was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00710966
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  • 6
    Electronic Resource
    Electronic Resource
    Heat transfer of gas-particle flow in a supersonic convergent-divergent nozzle (1968)
    Springer
    Flow, turbulence and combustion 18 (1968), S. 288-308 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Heat flux, wall heat transfer coefficients, and wall pressures are determined for high velocity flow of gas-solid mixtures in a converging-diverging nozzle. Flow separation accompanied with oblique shock formation occurs in the diverging section of the nozzle. The shock strength is reduced upon the addition of solid particles. The wall pressure in the convergent section of the nozzle appears unaffected by the presence of solid particles. In the divergent section, however, the wall pressure is slightly lowered. At the maximum ratio of solid to air flow used in the experiments (3.7) increases in the heat transfer rate of up to 20 and 50 percent are obtained in the convergent and separated (divergent) regions of the nozzle, respectively. Slightly larger increases in the wall heat transfer coefficients are also obtained. It is concluded that the wall heat flux and heat transfer coefficients are influenced strongly by the presence of disturbances upstream of the nozzle inlet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382354
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  • 7
    Electronic Resource
    Electronic Resource
    Response of field-grownCasuarina equisetifolia to inoculation withFrankia strain ORS 021001 entrapped in alginate beads (1989)
    Springer
    Plant and soil 118 (1989), S. 133-137 
    Details
    ISSN: 1573-5036
    Keywords: Casuarina equisetifolia ; Frankia ; alginate beads ; N2 fixation ; Sénégal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A large scale field experiment (ca 1 ha) was carried out in Senegal, to evaluate the response ofCasuarina equisetifolia to inoculation withFrankia strain ORS 021001 entrapped in alginate beads. Biomasses (expressed as dry weight or total nitrogen) of assimilatory branchlets, wood and roots, and nodules were measured in uninoculated and inoculated trees, randomly sampled 1,2 and 3 years after transplantation in the field. When biomasses were expressed as dry weight, increases due to inoculation were similar at the three sampling dates, 45, 36 and 40%, respectively. When biomasses were expressed as total nitrogen, the response to inoculation with time was much higher in the 2nd year than in the 1st and 3rd year. N2 fixation, estimated using the difference method reached 2.48, 12.25 and 13.44 g N2 fixed annually per tree. Correspondingly, nodule dry weights, expressed in g per tree, were 2.5, 12.18 and 22.75 at the end of the 1 st, 2nd and 3rd year, respectively. In spite of the positive response of field-grownCasuarina equisetifolia to inoculation, the decrease of N2 fixation observed in the third year was probably due to unfavorable climatic conditions coupled with insect attacks at the beginning of the third year.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02232798
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  • 8
    Electronic Resource
    Electronic Resource
    Future directions for biological nitrogen fixation research (1988)
    Springer
    Plant and soil 108 (1988), S. 191-199 
    Details
    ISSN: 1573-5036
    Keywords: nitrogen fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02370115
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  • 9
    Electronic Resource
    Electronic Resource
    Polymer-entrapped rhizobium as an inoculant for legumes (1982)
    Springer
    Plant and soil 65 (1982), S. 219-231 
    Details
    ISSN: 1573-5036
    Keywords: Alginate ; Carob gum ; France ; Inoculant ; Nodulation ; Polyacrylamide ; Polymer ; Rhizobium japonicum ; Senegal ; Soja ; Xanthan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Field and cylinder experiments conducted in France and in Senegal showed that polyacrylamide, previously proposed as an entrapping gel for preparing Rhizobium inoculants, could be replaced by alginate (AER inoculant) or a mixture of xanthan and carob gum (XER inoculant). Semi-dried or dried AER and XER were used successfully provided that their storage time was less than 90 days. In soil inoculation trails, no marked differences were observed among semi-dried XER, dried AER, and dried XER. A number of seed inoculation experiments indicated that dried XER significantly outranked AER. Seeds preinoculated by up to 48 days with XER yielded plants which were comparable in nodulation and growth parameters to those derived from plant receiving peat inoculation at the time of planting.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374652
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of inoculation withGlomus mosseae on nitrogen fixation by field grown soybeans (1982)
    Springer
    Plant and soil 68 (1982), S. 321-329 
    Details
    ISSN: 1573-5036
    Keywords: Alginate ; A value ; Endomycorrhiza ; Glomus mosseae ; Inoculant ; Nitrogen fixation ; Rhizobium japonicum ; Soybean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary This field study was undertaken to determine the effect of inoculation withGlomus mosseae on N2 fixation and P uptake by soybean. The inoculation withGlomus mosseae was achieved using a new type of inoculant, alginate-entrapped (AE) endomycorrhizal fungus. N2 fixation was assessed using the A value method. In P-fertilized plots, inoculation with AEGlomus mosseae increased the harvest index based on dry weight (+20%) and N content of seeds (+17%), the A value (+31%) and %N derived from fixation (+75%). Inoculation with AEGlomus mosseae decreased the coefficient of variation for the A value and for the dry weights of the different plant parts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02197937
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