Abstract
Adding biochar to soil can change soil properties and subsequently affect plant growth, but this effect can vary because of different feedstocks and methods (e.g., pyrolysis or gasification) used to create the biochar. Growth and biological nitrogen fixation (BNF) of leguminous plants can be improved with rhizobia inoculation that fosters nodule development. Thus, this factorial greenhouse study examined the effects of two types of biochar (i.e., pyrolysis and gasification) added at a rate of 5% (v:v) to a peat-based growth substrate and rhizobia inoculation (yes or no) on Robinia pseudoacacia (black locust) seedlings supplied with 15NH415NO3. Seedling and nodule growth, nitrogen (N) content, and δ15N × 1000 were evaluated after 3 months. While addition of biochar without inoculation had no effect on seedling growth, inoculation with rhizobia increased seedling growth, BNF, and N status. Inoculated seedlings had reduced δ15N, indicating that N provided via fertilization was being diluted by N additions through BNF. Biochar type and inoculation interacted to affect seedling growth. Combining inoculation with either biochar type increased seedling leaf, stem, and total biomass, whereas gasifier biochar and inoculation improved all seedling growth variables and nodule biomass.
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Claims 6
Claim · model-written summary
Adding biochar without inoculation had no effect on seedling growth.
- Taxon
- Robinia pseudoacacia
Robinia pseudoacaciae1 - Treatment
- addition of biochar without inoculatione2
- Outcome
- seedling growthe2
- Direction
- no effecte2
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this factorial greenhouse study examined the effects of two types of biochar”
e1“Robinia pseudoacacia (black locust) seedlings”
e2“While addition of biochar without inoculation had no effect on seedling growth”
Claim · model-written summary
Rhizobia inoculation increased seedling growth, biological nitrogen fixation and nitrogen status.
- Taxon
- Robinia pseudoacaciaRobinia pseudoacaciae1
- Treatment
- inoculation with rhizobiae3
- Interactor
- rhizobiae3symbiont
- Outcome
- seedling growth, BNF, and N statuse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Robinia pseudoacacia (black locust) seedlings”
e3“inoculation with rhizobia increased seedling growth, BNF, and N status”
Claim · model-written summary
Inoculated seedlings had reduced δ15N values, indicating N from fertilization was diluted by N fixed through BNF.
- Taxon
- Robinia pseudoacaciaRobinia pseudoacaciae1
- Treatment
- Inoculated seedlingse4
- Outcome
- δ15Ne4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Robinia pseudoacacia (black locust) seedlings”
e4“Inoculated seedlings had reduced δ15N”
Claim · model-written summary
Biochar type and inoculation interacted to affect seedling growth.
- Taxon
- Robinia pseudoacaciaRobinia pseudoacaciae1
- Treatment
- Biochar type and inoculatione5
- Outcome
- seedling growthe5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Robinia pseudoacacia (black locust) seedlings”
e5“Biochar type and inoculation interacted to affect seedling growth”
Claim · model-written summary
Combining inoculation with either biochar type increased seedling leaf, stem and total biomass.
- Taxon
- Robinia pseudoacaciaRobinia pseudoacaciae1
- Treatment
- Combining inoculation with either biochar typee6
- Outcome
- seedling leaf, stem, and total biomasse6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Robinia pseudoacacia (black locust) seedlings”
e6“Combining inoculation with either biochar type increased seedling leaf, stem, and total biomass”
Claim · model-written summary
Gasifier biochar combined with inoculation improved all seedling growth variables and nodule biomass.
- Taxon
- Robinia pseudoacaciaRobinia pseudoacaciae1
- Treatment
- gasifier biochar and inoculatione7
- Outcome
- all seedling growth variables and nodule biomasse7
- Direction
- improvede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Robinia pseudoacacia (black locust) seedlings”
e7“gasifier biochar and inoculation improved all seedling growth variables and nodule biomass”
The same questions in other papers
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- negative
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biochar · growth · Robinia pseudoacacia (black locust)Results agree
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inoculation · growth · Robinia pseudoacacia (black locust)Results agree
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- positive
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See all 11 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.