Abstract
Under greenhouse condition an experiment was carried out to evaluate trifluralin, chlorimuron and clomazone effects on nitrogen content and chlorophyll concentration in soybeans (Glycine max (L.) Merr. cv Uberlandia), throughout the plant cycle. The samples were collected at 14-day intervals being the first sample collected at 14 days after emergence. Herbicides affected N concentration of plant parts only during the vegetative growth stages of soybeans. Trifluralin and clomazone applications reduced N concentrations in the stems, leaves and roots. Chlorimuron, however, tended to increase leaf and nodule N concentrations. Pod, pod wall and seed N concentrations were not influenced by the herbicides. Leaves, stems and roots had greater N concentrations at the beginning of the vegetative cycle. There were no effects of herbicides on chlorophyll concentrations. It was estimated that the soil gained 4.7 g/m 2 of N during the plant cycle, as result of nitrogen fixation. Additional index terms: Glycine max, N2-fixation, pigment, chlorimuron, clomazone, trifluralin.
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Claims 8
Claim · model-written summary
Herbicides affected soybean plant-part nitrogen concentration only during vegetative growth.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- Herbicidese0
- Outcome
- N concentration of plant partse0
- Qualifier
- only during the vegetative growth stagese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Herbicides affected N concentration of plant parts only during the vegetative growth stages of soybeans.”
Claim · model-written summary
Trifluralin reduced nitrogen concentrations in soybean stems, leaves and roots.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- stems, leaves and rootse0
- Treatment
- Trifluraline0
- Outcome
- N concentrationse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trifluralin and clomazone applications reduced N concentrations in the stems, leaves and roots.”
t0“soybean”
Claim · model-written summary
Clomazone reduced nitrogen concentrations in soybean stems, leaves and roots.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- stems, leaves and rootse0
- Treatment
- clomazonee0
- Outcome
- N concentrationse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trifluralin and clomazone applications reduced N concentrations in the stems, leaves and roots.”
t0“soybean”
Claim · model-written summary
Chlorimuron tended to increase soybean leaf and nodule nitrogen concentrations.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Chlorimurone0
- Outcome
- leaf and nodule N concentrationse0
- Direction
- increasee0
- Qualifier
- tended toe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorimuron, however, tended to increase leaf and nodule N concentrations.”
t0“soybean”
Claim · model-written summary
Herbicides did not influence soybean pod, pod wall and seed nitrogen concentrations.
- Taxon
- soybeanGlycine maxt0
- Treatment
- herbicidese0
- Outcome
- Pod, pod wall and seed N concentrationse0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pod, pod wall and seed N concentrations were not influenced by the herbicides.”
t0“soybean”
Claim · model-written summary
Soybean leaves, stems and roots had greater nitrogen concentrations at the start of the vegetative cycle.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- Leaves, stems and rootse0
- Outcome
- N concentrationse0
- Direction
- greatere0
- Qualifier
- at the beginning of the vegetative cyclee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves, stems and roots had greater N concentrations at the beginning of the vegetative cycle.”
t0“soybean”
Claim · model-written summary
Herbicides had no effect on soybean chlorophyll concentrations.
- Taxon
- soybeanGlycine maxt0
- Treatment
- herbicidese0
- Outcome
- chlorophyll concentrationse0
- Direction
- no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no effects of herbicides on chlorophyll concentrations.”
t0“soybean”
Claim · model-written summary
Soil nitrogen gain from nitrogen fixation over the plant cycle was estimated at 4.7 g/m 2.
- Outcome
- Ne0
- Direction
- gainede0
- Value
- 4.7 g/m 2e0
- Qualifier
- during the plant cycle, as result of nitrogen fixatione0
Not reportedTaxon
Verbatim
e0“It was estimated that the soil gained 4.7 g/m 2 of N during the plant cycle, as result of nitrogen fixation.”
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See all 19 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.