Abstract
Abstract This study was initiated to isolate, characterize and select symbiotically effective rhizobia nodulating lentil (Lens culinaris medic) and to enumerate indigenous rhizobia nodulating lentil in some Ethiopian soils. More than 84 nodule and soil samples were collected. In sand culture, only 62 isolates were authenticated as rhizobia nodulating lentil. Analyses of variance indicated that most of the parameters measured were significantly (p < 0.05) improved by inoculation, with the exception of root length. Inoculation increased shoot length, shoot dry weight and plant total nitrogen by 82.3, 196 and 452%, respectively, over negative control (without inoculation and N fertilization). The tested isolates were found to be very effective (20.9%) and effective (77.4%), with only one ineffective isolate. Indigenous rhizobia in the investigated soils ranged from 30 to 5.8 × 103 cell g−1 dry soil. A pot experiment with selected rhizobia and nitrogen fertilizer on Chefedonsa and Debrezeit soils did not show any significant difference in shoot dry weight at p < 0.05. From the study, it was observed that most Ethiopian soils were inhabited by a moderate to high number of indigenous rhizobia and rhizobia inoculation did not improve lentil productivity in the investigated soils. Keywords: ChefedonsaDebrezeitindigenous rhizobialentil (Lens culinaris Medic)symbiotic effectiveness Acknowledgements The financial assistance provided by the Ministry of Sciences and Technology, Ethiopia, Addis Ababa, is gratefully acknowledged. Special thanks are also expressed to Mulualem Shumet and Genet Moges for their excellent assistance in the laboratory and greenhouse works.
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Claims 11
Claim · model-written summary
Only 62 isolates were authenticated as lentil-nodulating rhizobia in sand culture.
- Taxon
- lentil
Lens culinarise0 - Interactor
- rhizobiae0symbiont
- Outcome
- isolates were authenticated as rhizobia nodulating lentile0
- Value
- 62e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In sand culture, only 62 isolates were authenticated as rhizobia nodulating lentil”
Claim · model-written summary
Inoculation increased shoot length by 82.3% over the negative control.
- Taxon
- lentilLens culinarist0
- Treatment
- Inoculatione0
- Interactor
- rhizobiae2symbiont
- Outcome
- shoot lengthe0
- Direction
- increasede0
- Value
- 82.3e0
- Comparator
- negative controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation increased shoot length, shoot dry weight and plant total nitrogen by 82.3, 196 and 452%, respectively, over negative control (without inoculation and N fertilization)”
e1“Analyses of variance indicated that most of the parameters measured were significantly (p < 0.05) improved by inoculation, with the exception of root length”
e2“rhizobia nodulating lentil (Lens culinaris medic)”
t0“lentil (Lens culinarismedic)”
Claim · model-written summary
Inoculation increased shoot dry weight by 196% over the negative control.
- Taxon
- lentilLens culinarist0
- Treatment
- Inoculatione0
- Interactor
- rhizobiae2symbiont
- Outcome
- shoot dry weighte0
- Direction
- increasede0
- Value
- 196e0
- Comparator
- negative controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation increased shoot length, shoot dry weight and plant total nitrogen by 82.3, 196 and 452%, respectively, over negative control (without inoculation and N fertilization)”
e1“Analyses of variance indicated that most of the parameters measured were significantly (p < 0.05) improved by inoculation, with the exception of root length”
e2“rhizobia nodulating lentil (Lens culinaris medic)”
t0“lentil (Lens culinarismedic)”
Claim · model-written summary
Inoculation increased plant total nitrogen by 452% over the negative control.
- Taxon
- lentilLens culinarist0
- Treatment
- Inoculatione0
- Interactor
- rhizobiae2symbiont
- Outcome
- plant total nitrogene0
- Direction
- increasede0
- Value
- 452%e0
- Comparator
- negative controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation increased shoot length, shoot dry weight and plant total nitrogen by 82.3, 196 and 452%, respectively, over negative control (without inoculation and N fertilization)”
e1“Analyses of variance indicated that most of the parameters measured were significantly (p < 0.05) improved by inoculation, with the exception of root length”
e2“rhizobia nodulating lentil (Lens culinaris medic)”
t0“lentil (Lens culinarismedic)”
Claim · model-written summary
Root length was an exception to the significant improvement with inoculation.
- Taxon
- lentilLens culinarise1
- Treatment
- inoculatione0
- Interactor
- rhizobiae1symbiont
- Outcome
- root lengthe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of the parameters measured were significantly (p < 0.05) improved by inoculation, with the exception of root length”
e1“rhizobia nodulating lentil (Lens culinaris medic)”
Claim · model-written summary
The isolates were classified as very effective at 20.9%.
- Taxon
- lentilLens culinarise1
- Interactor
- rhizobiae1symbiont
- Outcome
- very effectivee0
- Value
- 20.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tested isolates were found to be very effective (20.9%) and effective (77.4%), with only one ineffective isolate”
e1“rhizobia nodulating lentil (Lens culinaris medic)”
Claim · model-written summary
The isolates were classified as effective at 77.4%.
- Taxon
- lentilLens culinarise1
- Interactor
- rhizobiae1symbiont
- Outcome
- effectivee0
- Value
- 77.4%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The tested isolates were found to be very effective (20.9%) and effective (77.4%), with only one ineffective isolate”
e1“rhizobia nodulating lentil (Lens culinaris medic)”
Claim · model-written summary
One isolate was ineffective.
- Taxon
- lentilLens culinarise1
- Interactor
- rhizobiae1symbiont
- Outcome
- ineffective isolatee0
- Value
- onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with only one ineffective isolate”
e1“rhizobia nodulating lentil (Lens culinaris medic)”
Claim · model-written summary
Indigenous rhizobia ranged from 30 to 5.8 × 103 cells per gram dry soil.
- Taxon
- lentilLens culinarise1
- Interactor
- rhizobiae0symbiont
- Outcome
- Indigenous rhizobia in the investigated soilse0
- Value
- 30 to 5.8 × 103 cell g−1 dry soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Indigenous rhizobia in the investigated soils ranged from 30 to 5.8 × 103 cell g−1 dry soil”
e1“rhizobia nodulating lentil (Lens culinaris medic)”
Claim · model-written summary
The pot experiment found no significant shoot dry weight difference among selected rhizobia and nitrogen fertilizer treatments.
- Taxon
- lentilLens culinarise1
- Treatment
- selected rhizobia and nitrogen fertilizere0
- Interactor
- rhizobiae0symbiont
- Outcome
- shoot dry weighte0
- Direction
- did not show any significant differencee0
- Setting
- Chefedonsa and Debrezeit soilse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment with selected rhizobia and nitrogen fertilizer on Chefedonsa and Debrezeit soils did not show any significant difference in shoot dry weight at p < 0.05”
e1“rhizobia nodulating lentil (Lens culinaris medic)”
Claim · model-written summary
The authors concluded rhizobia inoculation did not improve lentil productivity in investigated soils.
- Taxon
- lentilLens culinarise0
- Interactor
- rhizobiae0symbiont
- Outcome
- lentil productivitye0
- Direction
- did not improvee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rhizobia inoculation did not improve lentil productivity in the investigated soils”
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See all 36 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.