Abstract
Abstract The Canadian Prairies have become the new northern edge for soybean [ Glycine max (L.) Merr.] production in North America. In this short growing season production area, it has been speculated that application of nitrogen (N) fertilizer at planting could increase soybean growth, yield, and grain protein. To test this hypothesis, field experiments were conducted to determine if starter N fertilizer rates of 0, 17, 34, 50, 67, and 84 kg N ha −1 applied as broadcast and incorporated urea before planting would have an effect on biomass, yield, grain protein and oil, and biological N fixation (BNF) for a Maturity Group 00 soybean cultivar grown in Manitoba, Canada. There was no yield response to starter N fertilizer in 2 of the 3 yr of the study. There were no differences in biomass, grain protein, or oil content in response to starter N fertilizer. Nitrogen uptake at the full bloom stage (R2) increased at the highest N rate tested. Percent BNF as measured by relative ureide N (RUN) content in the N fertilized treatments was reduced in 2 of 3 yr relative to the control. The contributions of BNF, soil N, and fertilizer N to total crop uptake was influenced by growing conditions during the study period. The results of this study do not support the recommendation that starter N fertilizer be used as a way to increase soybean yield and grain protein in the short season soybean production areas of the Canadian Prairies.
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Claims 6
Claim · model-written summary
Starter nitrogen fertilizer produced no soybean yield response in two of three years.
- Taxon
- soybean
Glycine maxt0 - Treatment
- starter N fertilizere0
- Outcome
- yielde0
- Direction
- no yield responsee0
- Qualifier
- 2 of the 3 yre0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no yield response to starter N fertilizer in 2 of the 3 yr of the study.”
t0“soybean”
Claim · model-written summary
Starter nitrogen fertilizer did not change soybean biomass, grain protein or oil content.
- Taxon
- soybeanGlycine maxt0
- Treatment
- starter N fertilizere0
- Outcome
- biomass, grain protein, or oil contente0
- Direction
- no differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were no differences in biomass, grain protein, or oil content in response to starter N fertilizer.”
t0“soybean”
Claim · model-written summary
Nitrogen uptake at full bloom increased at the highest nitrogen rate.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- full bloom stage (R2)e0
- Treatment
- highest N rate testede0
- Outcome
- Nitrogen uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen uptake at the full bloom stage (R2) increased at the highest N rate tested.”
t0“soybean”
Claim · model-written summary
Nitrogen fertilization reduced percent biological nitrogen fixation in two of three years.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N fertilized treatmentse0
- Outcome
- Percent BNFe0
- Direction
- reducede0
- Qualifier
- 2 of 3 yre0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Percent BNF as measured by relative ureide N (RUN) content in the N fertilized treatments was reduced in 2 of 3 yr relative to the control.”
t0“soybean”
Claim · model-written summary
Growing conditions influenced the contributions of biological fixation, soil and fertilizer nitrogen to uptake.
- Taxon
- soybeanGlycine maxt0
- Outcome
- contributions of BNF, soil N, and fertilizer N to total crop uptakee0
- Setting
- growing conditionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contributions of BNF, soil N, and fertilizer N to total crop uptake was influenced by growing conditions during the study period.”
t0“soybean”
Claim · model-written summary
Authors do not recommend starter nitrogen fertilizer to increase soybean yield and grain protein in the short season Canadian Prairies.
- Taxon
- soybeanGlycine maxe0
- Outcome
- starter N fertilizer be used as a way to increase soybean yield and grain proteine0
- Setting
- Canadian Prairiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results of this study do not support the recommendation that starter N fertilizer be used as a way to increase soybean yield and grain protein in the short season soybean production areas of the Canadian Prairies.”
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