Abstract
The application of nitrification inhibitors (Nis) with nitrogen fertilizers is increasingly used as a management strategy to improve nitrogen use efficiency in crop production systems. To evaluate the effects of Ni dicyandiamide (DCD) and 1,2,4-triazole (TZ) on the rhizosphere microbiome and strawberry yield (Fragaria × ananassa Duch.), a two-year field experiment was conducted with three treatments: unfertilized control (C), mineral nitrogen fertilizer (N) applied in two doses (40 + 40 kg N ha−1 year−1), and a single nitrogen application (80 kg N ha−1 year−1) combined with nitrification inhibitors (N + Ni). Soil microbiota were assessed using cultivation-based methods and metabarcoding of 16S rRNA and ITS2 regions. Total bacterial counts on complex media increased from 5.85 to 6.15 log CFU g−1 in the N treatment, while remaining 5.89 in N + Ni. Microscopic fungi increased in fertilized treatments during spring but decreased in July of the second year. Microbial community composition differed among treatments, although sampling time explained a larger proportion of variability than fertilization. Relative abundance of Gemmatimonas decreased under N + Ni, whereas Nitrososphaera increased. Fungal Shannon diversity decreased in N + Ni, while prokaryotic diversity did not differ significantly. Despite similar levels of mineral nitrogen measured before harvest, strawberry yield increased significantly in the N + Ni treatment in the second year, reaching 109% higher values than the control and 80% higher than the N treatment. This may indicate that the fertilization regime including nitrification inhibitors influenced nitrogen availability earlier in the growing season.
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Claims 13
Claim · model-written summary
Total bacterial counts increased under N fertilizer.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Treatment
- N treatmente0
- Outcome
- Total bacterial counts on complex mediae0
- Direction
- increasede0
- Value
- 5.85 to 6.15 log CFU g−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Total bacterial counts on complex media increased from 5.85 to 6.15 log CFU g−1 in the N treatment, while remaining 5.89 in N + Ni.”
t0“Strawberry”
Claim · model-written summary
Total bacterial counts remained 5.89 under N plus inhibitor.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- N + Nie0
- Outcome
- Total bacterial counts on complex mediae0
- Direction
- remaininge0
- Value
- 5.89e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total bacterial counts on complex media increased from 5.85 to 6.15 log CFU g−1 in the N treatment, while remaining 5.89 in N + Ni.”
t0“Strawberry”
Claim · model-written summary
Microscopic fungi increased during spring under fertilization.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- fertilized treatmentse0
- Outcome
- Microscopic fungie0
- Direction
- increasede0
- Qualifier
- during springe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microscopic fungi increased in fertilized treatments during spring but decreased in July of the second year.”
t0“Strawberry”
Claim · model-written summary
Microscopic fungi decreased in July of the second year under fertilization.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- fertilized treatmentse0
- Outcome
- Microscopic fungie0
- Direction
- decreasede0
- Qualifier
- in July of the second yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microscopic fungi increased in fertilized treatments during spring but decreased in July of the second year.”
t0“Strawberry”
Claim · model-written summary
Microbial community composition differed among treatments.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- Microbial community compositione0
- Qualifier
- differed among treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial community composition differed among treatments, although sampling time explained a larger proportion of variability than fertilization.”
t0“Strawberry”
Claim · model-written summary
Sampling time explained more community variability than fertilization.
- Taxon
- StrawberryFragaria ×ananassat0
- Outcome
- variabilitye0
- Direction
- largere0
- Comparator
- fertilizatione0
- Setting
- sampling timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial community composition differed among treatments, although sampling time explained a larger proportion of variability than fertilization.”
t0“Strawberry”
Claim · model-written summary
Gemmatimonas relative abundance decreased under N plus inhibitor.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- N + Nie0
- Interactor
- Gemmatimonas
Gemmatimonase0other - Outcome
- Relative abundance of Gemmatimonase0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative abundance of Gemmatimonas decreased under N + Ni, whereas Nitrososphaera increased.”
t0“Strawberry”
Claim · model-written summary
Nitrososphaera relative abundance increased under N plus inhibitor.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- N + Nie0
- Interactor
- Nitrososphaera
Nitrososphaerae0other - Outcome
- Nitrososphaerae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative abundance of Gemmatimonas decreased under N + Ni, whereas Nitrososphaera increased.”
t0“Strawberry”
Claim · model-written summary
Fungal Shannon diversity decreased under N plus inhibitor.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- N + Nie0
- Outcome
- Fungal Shannon diversitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungal Shannon diversity decreased in N + Ni, while prokaryotic diversity did not differ significantly.”
t0“Strawberry”
Claim · model-written summary
Prokaryotic diversity did not differ significantly.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- N + Nie0
- Outcome
- prokaryotic diversitye0
- Direction
- did not differe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fungal Shannon diversity decreased in N + Ni, while prokaryotic diversity did not differ significantly.”
t0“Strawberry”
Claim · model-written summary
Strawberry yield under N plus inhibitor was 109% higher than the control in year two.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- N + Ni treatmente0
- Outcome
- strawberry yielde0
- Direction
- highere0
- Value
- 109%e0
- Qualifier
- in the second yeare0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite similar levels of mineral nitrogen measured before harvest, strawberry yield increased significantly in the N + Ni treatment in the second year, reaching 109% higher values than the control and 80% higher than the N treatment.”
Claim · model-written summary
Strawberry yield under N plus inhibitor was 80% higher than the N treatment in year two.
- Taxon
- strawberryFragaria ×ananassae0
- Treatment
- N + Ni treatmente0
- Outcome
- strawberry yielde0
- Direction
- highere0
- Value
- 80%e0
- Qualifier
- in the second yeare0
- Comparator
- the N treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite similar levels of mineral nitrogen measured before harvest, strawberry yield increased significantly in the N + Ni treatment in the second year, reaching 109% higher values than the control and 80% higher than the N treatment.”
Claim · model-written summary
The inhibitor-containing fertilization regime may have influenced earlier nitrogen availability.
- Taxon
- StrawberryFragaria ×ananassat0
- Treatment
- fertilization regime including nitrification inhibitorse0
- Outcome
- nitrogen availabilitye0
- Qualifier
- earlier in the growing seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This may indicate that the fertilization regime including nitrification inhibitors influenced nitrogen availability earlier in the growing season.”
t0“Strawberry”
The same questions in other papers
nickel atom · yield · Fragaria x ananassa (strawberry)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.