Abstract
Nitrogen (N) mineralization from black oat residues (Avena strigosa), with or without previous application of herbicides, and its utilization by corn crop were investigated. The experiments were performed in a completely randomized setup, with three treatments and ten replicates. The treatments were: A) control - corn grown in soil with residues of black oats harvested without herbicide application; B) glyphosate - corn grown in soil with residues of glyphosate-desiccated black oat; and C) glufosinate - corn grown in soil with residues of black oat previously desiccated with glufosinate-ammonium. The remaining black oat residues on the soil surface were smaller in the control treatment than in glyphosate and glufosinate treatments. Black oat residues from the control treatment released 30% and 20% more carbon (C) and nitrogen (N), respectively, than from herbicide treatments. Microbial biomass carbon, total and mineral soil N arising from black oat residues were reduced by herbicide management. Black oat residues treated with glyphosate reduced corn total-N by 16%; however, dry mass yield was not affected by the treatments. Herbicide application on black oat reduced the total amount of residue-released nitrogen in the corn kernels, leaves and the whole plant. Net nitrogen mineralization from black oat residues is affected by the application of glyphosate or glufosinate-ammonium.
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Claims 7
Claim · model-written summary
Less black oat residue remained in the control than herbicide treatments.
- Taxon
- black oat
Avena strigosae0 - Treatment
- control treatmente0
- Outcome
- remaining black oat residues on the soil surfacee0
- Direction
- smallere0
- Comparator
- glyphosate and glufosinate treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The remaining black oat residues on the soil surface were smaller in the control treatment than in glyphosate and glufosinate treatments.”
Claim · model-written summary
Control black oat residues released 30% more carbon than herbicide treated residues.
- Taxon
- Black oatAvena strigosae0
- Treatment
- control treatmente0
- Outcome
- carbon (C)e0
- Direction
- moree0
- Value
- 30%e0
- Comparator
- herbicide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Black oat residues from the control treatment released 30% and 20% more carbon (C) and nitrogen (N), respectively, than from herbicide treatments.”
Claim · model-written summary
Control black oat residues released 20% more nitrogen than herbicide treated residues.
- Taxon
- Black oatAvena strigosae0
- Treatment
- control treatmente0
- Outcome
- nitrogen (N)e0
- Direction
- moree0
- Value
- 20%e0
- Comparator
- herbicide treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Black oat residues from the control treatment released 30% and 20% more carbon (C) and nitrogen (N), respectively, than from herbicide treatments.”
Claim · model-written summary
Herbicide management reduced microbial biomass carbon and soil nitrogen from residues.
- Taxon
- black oatAvena strigosae0
- Treatment
- herbicide managemente0
- Outcome
- Microbial biomass carbon, total and mineral soil Ne0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Microbial biomass carbon, total and mineral soil N arising from black oat residues were reduced by herbicide management.”
Claim · model-written summary
Glyphosate treated black oat residues reduced corn total nitrogen by 16%.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Black oat residues treated with glyphosatee0
- Outcome
- corn total-Ne0
- Direction
- reducede0
- Value
- 16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Black oat residues treated with glyphosate reduced corn total-N by 16%”
Claim · model-written summary
Treatments did not significantly alter corn dry mass yield.
Not reportedTaxonComparator
Verbatim
e0“dry mass yield was not affected by the treatments”
Claim · model-written summary
Herbicide application to black oats reduced residue derived nitrogen in corn kernels, leaves, and whole plants.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Herbicide application on black oate0
- Outcome
- total amount of residue-released nitrogen in the corn kernels, leaves and the whole plante0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbicide application on black oat reduced the total amount of residue-released nitrogen in the corn kernels, leaves and the whole plant.”
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glyphosate · nutrient: content · Zea mays (maize)Positive and negative results
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See all 47 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.