Abstract
Soybean physiology, seed yield and composition can vary greatly and are a function of genetics, environment, and management practices. N fertilizer is not often applied to soybeans, but it can affect yield and seed composition, and the outcome of N fertilization has varied widely among studies. To test if certain physiological responses might be linked with positive agronomic responses to N fertilizer, a field study was conducted in varied environments unique to the Southeast United States (US). Five genotypes from maturity groups V-VII were evaluated. Although the environment and genotype had significant effects on most of the physiological characteristics and yield components measured, nitrogen application interacted significantly with environment for seed protein concentration, seed oil concentration, yield, and percent of nitrogen derived from the atmosphere in leaves during the seed fill period. The direction of the nitrogen effect on protein concentration differed among environments, increasing protein concentration in one environment and reducing protein concentration in another environment. Nitrogen application effects did not vary among the genotypes included in this study. Photosynthetic and nitrogen fixation responses to nitrogen application were not clearly linked with seed protein concentration response. A tailored nitrogen recommendation for environment is the best option for improving seed protein in this region with diverse environmental conditions.
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Claims 8
Claim · model-written summary
Nitrogen application interacted significantly with environment for seed protein concentration, seed oil concentration and yield.
- Taxon
- soybean
Glycine maxt0 - Treatment
- nitrogen applicatione2
- Outcome
- seed protein concentration, seed oil concentration, yielde2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e2“nitrogen application interacted significantly with environment for seed protein concentration, seed oil concentration, yield, and percent of nitrogen derived from the atmosphere in leaves during the seed fill period”
Claim · model-written summary
Nitrogen application interacted significantly with environment for the percent of nitrogen derived from the atmosphere in leaves during seed fill.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- leaves during the seed fill periode2
- Treatment
- nitrogen applicatione2
- Outcome
- percent of nitrogen derived from the atmosphere in leavese2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e2“nitrogen application interacted significantly with environment for seed protein concentration, seed oil concentration, yield, and percent of nitrogen derived from the atmosphere in leaves during the seed fill period”
Claim · model-written summary
Nitrogen increased protein concentration in one environment.
- Taxon
- soybeanGlycine maxt0
- Treatment
- nitrogene3
- Outcome
- protein concentratione3
- Direction
- increasinge3
- Setting
- one environmente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e3“The direction of the nitrogen effect on protein concentration differed among environments, increasing protein concentration in one environment and reducing protein concentration in another environment”
Claim · model-written summary
Nitrogen reduced protein concentration in another environment.
- Taxon
- soybeanGlycine maxt0
- Treatment
- nitrogene3
- Outcome
- protein concentratione3
- Direction
- reducinge3
- Setting
- another environmente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e3“The direction of the nitrogen effect on protein concentration differed among environments, increasing protein concentration in one environment and reducing protein concentration in another environment”
Claim · model-written summary
Nitrogen application effects did not vary among the soybean genotypes.
- Taxon
- soybeanGlycine maxt0
- Material
- genotypese4
- Treatment
- Nitrogen applicatione4
- Outcome
- Nitrogen application effectse4
- Direction
- no_changeinferrede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e4“Nitrogen application effects did not vary among the genotypes included in this study”
Claim · model-written summary
Photosynthetic and nitrogen fixation responses to nitrogen application were not clearly linked with the seed protein response.
- Taxon
- soybeanGlycine maxt0
- Treatment
- nitrogen applicatione5
- Outcome
- Photosynthetic and nitrogen fixation responsese5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e5“Photosynthetic and nitrogen fixation responses to nitrogen application were not clearly linked with seed protein concentration response”
Claim · model-written summary
The authors recommend a tailored nitrogen recommendation for each environment to improve seed protein in this region.
- Taxon
- soybeanGlycine maxt0
- Treatment
- tailored nitrogen recommendation for environmente6
- Outcome
- improving seed proteine6
- Setting
- this regione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e6“A tailored nitrogen recommendation for environment is the best option for improving seed protein in this region”
Claim · model-written summary
Environment and genotype had significant effects on most physiological characteristics and yield components of soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- environment and genotypee1
- Outcome
- physiological characteristics and yield componentse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Nitrogen fertilizer effects on soybean physiology, yield components, seed yield and protein content in the Southeastern United States”
e1“Although the environment and genotype had significant effects on most of the physiological characteristics and yield components measured”
The same questions in other papers
nitrogen · quality: protein · Glycine max (soybean)Results differ
46 papers in the same direction as this paper · 18 in the opposite direction
- positive
- positive
- no effect
61 papers more in this group
See all 65 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.