Abstract
Core Ideas A full set of N 2 –fixing nodules can supply soybean N demands. Seed inoculation increased nodulation and grain yield of field‐grown soybean. Additional spray inoculations (V1, V3, V6, R1, or R3) resulted in further increases. New nodules and grain yield increases can be achieved by additional inoculations. Highly productive soybean [ Glycine max (L.) Merr.] genotypes require that large amounts of N be supplied throughout the growth cycle to attain high yields. The nutrient can be obtained through biological N 2 fixation by elite bradyrhizobial strains if a set of fully functional nodules is available. This study was conducted during two crop seasons in the central‐west region of Brazil to investigate if additional inoculations via spray applications of bradyrhizobia at different stages of the growth cycle can result in increased nodulation and grain yield. Even though the soils had high populations of soybean bradyrhizobia, seed inoculation at sowing increased grain yield by 28 and 27% in the first and second seasons, respectively, compared to the non‐inoculated control. Additional inoculations performed until the R6 stage significantly increased soybean nodulation, which might indicate that plants were able to overcome the limitations of autoregulation of nodulation, allowing the development of new functional nodules to sustain the increased demand for N at latter stages of the growth cycle, especially during pod filling. In response to the increased nodulation, grain yield gains of 2 and 7% were obtained in the first and second experiments, respectively, relative to inoculation at sowing only. Our results indicate that soybean roots can form new nodules in response to additional inoculations, promoting increased N 2 fixation and higher grain yield.
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 3
Claim · model-written summary
Seed inoculation at sowing increased soybean grain yield by 28 and 27% in the first and second seasons relative to the non-inoculated control.
- Taxon
- soybean
Glycine maxe2 - Treatment
- seed inoculation at sowinge1
- Interactor
- bradyrhizobiae3symbiont
- Outcome
- grain yielde1
- Direction
- increasede1
- Value
- 28 and 27%e1
- Comparator
- non‐inoculated controle1
- Setting
- first and second seasonse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“seed inoculation at sowing increased grain yield by 28 and 27% in the first and second seasons, respectively, compared to the non‐inoculated control”
e2“Additional inoculations performed until the R6 stage significantly increased soybean nodulation”
e3“via spray applications of bradyrhizobia at different stages of the growth cycle”
Claim · model-written summary
Additional inoculations performed until the R6 stage significantly increased soybean nodulation.
- Taxon
- soybeanGlycine maxe2
- Treatment
- Additional inoculationse2
- Interactor
- bradyrhizobiae3symbiont
- Outcome
- soybean nodulatione2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Additional inoculations performed until the R6 stage significantly increased soybean nodulation”
e3“via spray applications of bradyrhizobia at different stages of the growth cycle”
Claim · model-written summary
Additional spray inoculations at V1 to R3 gave grain yield gains of 2 and 7% relative to inoculation at sowing only.
- Taxon
- soybeanGlycine maxe2
- Treatment
- Additional spray inoculationse5
- Interactor
- bradyrhizobiae3symbiont
- Outcome
- grain yielde4
- Direction
- increaseinferrede4
- Value
- 2 and 7%e4
- Comparator
- inoculation at sowing onlye4
- Setting
- first and second experimentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Additional inoculations performed until the R6 stage significantly increased soybean nodulation”
e3“via spray applications of bradyrhizobia at different stages of the growth cycle”
e4“In response to the increased nodulation, grain yield gains of 2 and 7% were obtained in the first and second experiments, respectively, relative to inoculation at sowing only”
e5“Additional spray inoculations (V1, V3, V6, R1, or R3) resulted in further increases”
The same questions in other papers
inoculation · symbiosis · Glycine max (soybean)Positive and negative results
264 papers in the same direction as this paper · 43 in the opposite direction · 2 reporting no difference from an alternative
- negative
- no effect
- negative
306 papers more in this group
See all 310 papers →application · yield · Glycine max (soybean)Positive and negative results
331 papers in the same direction as this paper · 66 in the opposite direction · 6 reporting no difference from an alternative
- no effect
- positive
- negative
400 papers more in this group
See all 404 papers →inoculation · yield · Glycine max (soybean)Positive and negative results
490 papers in the same direction as this paper · 63 in the opposite direction · 12 reporting no difference from an alternative
- no effect
- no effect
- no effect
562 papers more in this group
See all 566 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.