Abstract
Soybean [Glycine max (L.) Merr.] grain yield is closely associated with the level of optimal nitrogen (N) supply, especially during the reproductive stages. Foliar fertilization with low rates of N have been considered as a strategy for furnishing additional N and enhancing grain yields. Field studies using 15N tracer were conducted over two growing seasons to investigate the impact of foliar N fertilization on grain yield, plant N content, the amount of N derived from fertilizer (NDFF) and N recovery efficiency (NRE). Four foliar N rates (0, 1300, 2600 and 3900 g ha−1) were supplied by two equal split applications at the R1 and R3 stages. Foliar N fertilization of soybean canopies did not affect grain yield, grain N content, shoot N content nor plant N content. Total NDFF was increased from 0.7 to 2.0 kg ha−1 across the N rates. Nonetheless, NRE was unaffected by foliar N fertilization, which averaged 53 %. Soybean plants allocated the same amount of N fertilizer to both grains and shoots. No significant effects of low rate foliar N fertilization were registered on soybean grain yield nor plant N content, despite considerable N fertilizer recovery by plant organs.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Foliar N fertilization of soybean canopies did not affect grain yield, grain N content or shoot N content.
- Taxon
- soybean
Glycine maxt0 - Treatment
- Foliar N fertilizatione2
- Outcome
- grain yield, grain N content, shoot N contente2
- Direction
- did not affecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean canopies”
e2“Foliar N fertilization of soybean canopies did not affect grain yield, grain N content, shoot N content nor plant N content”
Claim · model-written summary
Foliar N fertilization of soybean canopies did not affect plant N content.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Foliar N fertilizatione2
- Outcome
- plant N contente2
- Direction
- did not affecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean canopies”
e2“Foliar N fertilization of soybean canopies did not affect grain yield, grain N content, shoot N content nor plant N content”
Claim · model-written summary
Total N derived from fertilizer in soybean increased from 0.7 to 2.0 kg ha-1 across the foliar N rates.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar N ratese1
- Outcome
- Total NDFFe3
- Direction
- increasede3
- Value
- from 0.7 to 2.0 kg ha−1e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean canopies”
e1“Four foliar N rates (0, 1300, 2600 and 3900 g ha−1) were supplied by two equal split applications at the R1 and R3 stages”
e3“Total NDFF was increased from 0.7 to 2.0 kg ha−1 across the N rates”
Claim · model-written summary
N recovery efficiency of soybean was unaffected by foliar N fertilization and averaged 53 %.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar N fertilizatione4
- Outcome
- NREe4
- Direction
- unaffectede4
- Value
- 53 %e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean canopies”
e4“NRE was unaffected by foliar N fertilization, which averaged 53 %”
Claim · model-written summary
Soybean plants allocated the same amount of fertilizer N to grains and to shoots.
- Taxon
- SoybeanGlycine maxe5
- Organ / stage
- grains and shootse5
- Outcome
- allocated the same amount of N fertilizer to both grains and shootse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Soybean plants allocated the same amount of N fertilizer to both grains and shoots”
The same questions in other papers
application · nutrient: efficiency · Glycine max (soybean)Positive and negative results
1 in the opposite direction
- positive
fertilization · nutrient: efficiency · Glycine max (soybean)Positive and negative results
13 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 papers →application · nutrient: content · Glycine max (soybean)Positive and negative results
10 papers in the same direction as this paper · 62 in the opposite direction
- positive
- positive
- positive
69 papers more in this group
See all 73 papers →fertilization · nutrient: content · Glycine max (soybean)Positive and negative results
44 papers in the same direction as this paper · 265 in the opposite direction
- positive
- positive
- positive
306 papers more in this group
See all 310 papers →application · yield · Glycine max (soybean)Positive and negative results
71 papers in the same direction as this paper · 332 in the opposite direction
- positive
- positive
- positive
400 papers more in this group
See all 404 papers →fertilization · yield · Glycine max (soybean)Positive and negative results
170 papers in the same direction as this paper · 1,021 in the opposite direction
- positive
- positive
- positive
1,188 papers more in this group
See all 1,192 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.