Abstract
This work intended to evaluate the contribution of single inoculation of diazotrophic bacteria Herbaspirillum seropedicae or Azospirillum brasilense on growth and yield of maize crop at different levels of N fertilization. Two field experiments were carried out in the summer and winter seasons. Factorial design combined four fertilization levels (0, 50, 100 and 150 kg N ha−1) and three seed inoculations (non-inoculation, strains Hs-ZAE94 or Ab-Sp245), with four replications. Shoot dry matter, leaf area index, and N accumulation were evaluated in weekly samplings, and grain yield measured at maturity. Most expressive responses of inoculation were observed in the summer crop, with minor effects in the winter crop when growth and yield were lower. In the summer, inoculation increased shoot dry matter and leaf area of maize plants, enhancing crop growth rate, and increased N accumulated by shoots, particularly at low levels of N supply. In the summer, Hs-ZAE94 increased grain yield at the levels of 0, 50 and 100 kg N ha−1, and Ab-Sp245 at 100 kg N ha−1, as compared to non-inoculation. Inoculation with Hs-ZAE94 associated with 50 kg N ha−1 provided similar grain yield than the non-inoculation with 150 kg N ha−1, improving N use efficiency.
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Claims 8
Claim · model-written summary
Inoculation increased shoot dry matter and leaf area of maize in summer compared with non-inoculation.
- Treatment
- inoculatione1
- Interactor
- diazotrophic bacteriat1symbiont
- Outcome
- shoot dry matter and leaf areae1
- Direction
- increasede1
- Comparator
- non-inoculatione5
- Setting
- summere1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
t1“Inoculation of diazotrophic bacteria”
e1“In the summer, inoculation increased shoot dry matter and leaf area of maize plants, enhancing crop growth rate, and increased N accumulated by shoots, particularly at low levels of N supply”
e5“as compared to non-inoculation”
Claim · model-written summary
Inoculation enhanced crop growth rate of maize in summer compared with non-inoculation.
- Treatment
- inoculatione1
- Interactor
- diazotrophic bacteriat1symbiont
- Outcome
- crop growth ratee1
- Direction
- enhancinge1
- Comparator
- non-inoculatione5
- Setting
- summere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
t1“Inoculation of diazotrophic bacteria”
e1“In the summer, inoculation increased shoot dry matter and leaf area of maize plants, enhancing crop growth rate, and increased N accumulated by shoots, particularly at low levels of N supply”
e5“as compared to non-inoculation”
Claim · model-written summary
Inoculation increased N accumulated by maize shoots in summer, particularly at low N supply, compared with non-inoculation.
- Treatment
- inoculatione1
- Interactor
- diazotrophic bacteriat1symbiont
- Outcome
- N accumulated by shootse1
- Direction
- increasede1
- Qualifier
- particularly at low levels of N supplye1
- Comparator
- non-inoculatione5
- Setting
- summere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
t1“Inoculation of diazotrophic bacteria”
e1“In the summer, inoculation increased shoot dry matter and leaf area of maize plants, enhancing crop growth rate, and increased N accumulated by shoots, particularly at low levels of N supply”
e5“as compared to non-inoculation”
Claim · model-written summary
Hs-ZAE94 increased maize grain yield at 0, 50 and 100 kg N ha−1 compared with non-inoculation.
- Treatment
- Hs-ZAE94e2
- Interactor
- Herbaspirillum seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- grain yielde2
- Direction
- increasede2
- Qualifier
- 0, 50 and 100 kg N ha−1e2
- Comparator
- non-inoculatione2
- Setting
- summere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e2“In the summer, Hs-ZAE94 increased grain yield at the levels of 0, 50 and 100 kg N ha−1, and Ab-Sp245 at 100 kg N ha−1, as compared to non-inoculation”
e0“single inoculation of diazotrophic bacteria Herbaspirillum seropedicae or Azospirillum brasilense”
Claim · model-written summary
Ab-Sp245 increased maize grain yield at 100 kg N ha−1 compared with non-inoculation.
- Treatment
- Ab-Sp245e2
- Interactor
- Azospirillum brasilense
Azospirillum brasilensee0symbiont - Outcome
- grain yielde2
- Direction
- increasede2
- Qualifier
- 100 kg N ha−1e2
- Comparator
- non-inoculatione2
- Setting
- summere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e2“In the summer, Hs-ZAE94 increased grain yield at the levels of 0, 50 and 100 kg N ha−1, and Ab-Sp245 at 100 kg N ha−1, as compared to non-inoculation”
e0“single inoculation of diazotrophic bacteria Herbaspirillum seropedicae or Azospirillum brasilense”
Claim · model-written summary
Inoculation with Hs-ZAE94 at 50 kg N ha−1 gave grain yield similar to non-inoculation at 150 kg N ha−1.
- Treatment
- Inoculation with Hs-ZAE94 associated with 50 kg N ha−1e3
- Interactor
- Herbaspirillum seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- grain yielde3
- Direction
- similare3
- Comparator
- non-inoculation with 150 kg N ha−1e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e3“Inoculation with Hs-ZAE94 associated with 50 kg N ha−1 provided similar grain yield than the non-inoculation with 150 kg N ha−1, improving N use efficiency”
e0“single inoculation of diazotrophic bacteria Herbaspirillum seropedicae or Azospirillum brasilense”
Claim · model-written summary
Inoculation with Hs-ZAE94 at 50 kg N ha−1 improved N use efficiency relative to non-inoculation at 150 kg N ha−1.
- Treatment
- Inoculation with Hs-ZAE94 associated with 50 kg N ha−1e3
- Interactor
- Herbaspirillum seropedicaeHerbaspirillum seropedicaee0symbiont
- Outcome
- N use efficiencye3
- Direction
- improvinge3
- Comparator
- non-inoculation with 150 kg N ha−1e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e3“Inoculation with Hs-ZAE94 associated with 50 kg N ha−1 provided similar grain yield than the non-inoculation with 150 kg N ha−1, improving N use efficiency”
e0“single inoculation of diazotrophic bacteria Herbaspirillum seropedicae or Azospirillum brasilense”
Claim · model-written summary
Responses to inoculation were most expressive in the summer crop, with minor effects in the winter crop.
- Outcome
- responses of inoculatione4
- Direction
- Most expressivee4
- Comparator
- winter crope4
- Setting
- summer crope4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e4“Most expressive responses of inoculation were observed in the summer crop, with minor effects in the winter crop when growth and yield were lower”
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See all 8 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.