Effects of inoculation method and size of <i>Rhizobium meliloti</i> population in the soil on nodulation of alfalfa

Rice, W. A.; Olsen, P. E.

doi:10.4141/cjss92-006

Cited by 24 publications

(10 citation statements)

References 14 publications

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“…These methods are often better and never worse than conventional seed inoculation for initiating nodulation and N2 fixation (e.g. Brockwell et al, 1980;Chamber, 1983;Danso et al, 1990a;Hale, 1981;Jensen, 1987;Muldoon et al, 1980;Rice and Olsen, 1992). Solid inoculant may be introduced into the seed bed through an insecticide attachment to the seed drill.…”

Section: Application Of Inoculantmentioning

confidence: 99%

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

1995

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Section: Application Of Inoculantmentioning

confidence: 99%

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

1995

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“…However, inoculation with strain NRG-34 resulted in only 5.6% occupancy by indigenous populations of NRG-185. In a previous study, nodule occupancy by the inoculant rhizobia of 46.5% in the establishment year and 28.2% the following June significantly increased the biomass of alfalfa grown on a similar soil type (Rice and Olsen, 1992). In this study, strain NRG-34 had 80.6% occupancy in the establishment year which decreased to 60.4% in the second year, whereas strain NRG-185 decreased from 50.7% to 25.0%.…”

Section: Field Evaluationmentioning

confidence: 76%

Symbiotic effectiveness of Rhizobium meliloti at low root temperature

1995

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Laboratory, growth chamber and field experiments were conducted to select among 226 isolates of Rhizobium meliloti for the ability to grow, nodulate alfalfa (Medicago sativa L.) and support N2-dependent plant growth between 9 ° and 12 o C. There was wide variation in the abilities of R. meliloti isolates to grow and form nodules at 10 °C. Culture doubling times (td) varied from 1 to 155 h, and the number of nodules formed on alfalfa in growth pouches in 2 weeks varied from 0 to 3.8 nodules per plant. Nodulation occurred at 9 °C, but there was no significant N2-dependent plant growth at this temperature. However, several isolates of R. meliloti had the ability to nodulate alfalfa and produce N2 -dependent growth at root temperatures between 10 o and 12 °C. Six isolates, including strain NRG-34, produced significantly more N2-dependent plant growth at 12 °C root temperature than did 14 other isolates tested. In field experiments, inoculation with strain NRG-34 resulted in greater nodule numbers, nodule weight, proportion of nodules occupied by the inoculant strain and plant weight than did inoculation with a commercial strain (NRG-185). These results permitted selection of a strain with better low-temperature competitive abilities than the currently available commercial strains.

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“…The value of inoculating alfalfa seed has been demonstrated before in the Peace River region of Alberta and British Columbia (13,14). Thompson and Stout (6) found no significant differences between seed-applied and coated inoculant in nodulation and DM yield of alfalfa.…”

Section: Resultsmentioning

confidence: 93%

Field comparison of pre-inoculated alfalfa seed and traditional seed inoculation with inoculant prepared in sterile or non-sterile peat

Rice

Olsen

Lupwayi

et al. 2001

Communications in Soil Science and Plant Analysis

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Rhizobium inoculant products in North America are often prepared using non-sterile peat and may contain more contaminants than rhizobia. The effectiveness of sterile and nonsterile peat-based inoculants applied to alfalfa (Medicago sativa ) seed using either traditional seed inoculation just before planting, or pre-inoculated and commercially coated, were evaluated for three years (eight harvests) at two sites in northwestern Alberta. Seeds inoculated just before planting had more rhizobia at planting time than pre-inoculated seed. When results from all the three years were combined, inoculation with Rhizobium, either seed-applied or pre-inoculated, significantly ðP , 0:05Þ increased nodule dry matter (DM) at both sites. However, the response of 2091 ORDER REPRINTS forage N and DM yields to inoculation were significantly higher with seed application than with seed coating at one site, and viceversa at the other site. Differences resulting from the use of nonsterile peat or sterile peat were not significant.

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Effects of inoculation method and size of Rhizobium meliloti population in the soil on nodulation of alfalfa

Abstract: par la souche inoculde. L'inoculant granulaire placd avec la semence ou sous la ligne de semis a donn6 des nodosit6s plus lourdes, plus nombreuses et occup6es dans une plus forte proportion par la souche

Cited by 24 publications

References 14 publications

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

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

Symbiotic effectiveness of Rhizobium meliloti at low root temperature

Field comparison of pre-inoculated alfalfa seed and traditional seed inoculation with inoculant prepared in sterile or non-sterile peat

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