Abstract
This study aimed to find out the effect of plant growth-promoting rhizobacteria (PGPR; Azospirillum brasilense and Azotobacter vinelandii) either alone or in combination with different doses of nitrogen and phosphate fertilizers on growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya. PGPR were applied as seed inoculation at 10(6) cells/mL(-1) so that the number of bacterial cells per seed was 2.6 × 10(5) cells/seed. The chemical fertilizers, namely, urea and diammonium phosphate (DAP) were applied in different doses (full dose (urea 160 kg ha(-1) + DAP 180 kg ha(-1)), half dose (urea 80 kg ha(-1) + DAP 90 kg ha(-1)), and quarter dose (urea 40 kg ha(-1) + DAP 45 kg ha(-1)). The chemical fertilizers at full and half dose significantly increased the chlorophyll, carotenoids, and protein content of leaves and the seed yield (in kilogram per hectare) but had no effect on the oil content of seed. The erucic acid (C22:1) content present in the seed was increased. Azospirillum performed better than Azotobacter and its effect was at par with full dose of chemical fertilizers (CFF) for pigments and protein content of leaves when inoculated in the presence of half dose of chemical fertilizers (SPH). The seed yield and seed size were greater. Supplementing Azospirillum with SPH assisted Azospirillum to augment the growth and yield, reduced the erucic acid (C22:1) and glucosinolates contents, and increased the unsaturation in seed oil. It is inferred that A. brasilense could be applied as an efficient bioinoculant for enhancing the growth, seed yield, and oil quality of Ethiopian mustard at low fertilizer costs and sustainable ways.
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Claims 11
Claim · model-written summary
Full and half chemical fertilizer doses significantly increased leaf chlorophyll, carotenoid and protein content.
- Taxon
- Brassica carinata
Brassica carinatae1 - Material
- cv. Peela Rayae1
- Organ / stage
- leavese2
- Treatment
- chemical fertilizers at full and half dosee2
- Outcome
- chlorophyll, carotenoids, and protein content of leavese2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e2“The chemical fertilizers at full and half dose significantly increased the chlorophyll, carotenoids, and protein content of leaves and the seed yield (in kilogram per hectare) but had no effect on the oil content of seed”
Claim · model-written summary
Full and half chemical fertilizer doses significantly increased seed yield.
- Taxon
- Brassica carinataBrassica carinatae1
- Treatment
- chemical fertilizers at full and half dosee2
- Outcome
- seed yielde2
- Direction
- increasede2
- Qualifier
- in kilogram per hectaree2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e2“The chemical fertilizers at full and half dose significantly increased the chlorophyll, carotenoids, and protein content of leaves and the seed yield (in kilogram per hectare) but had no effect on the oil content of seed”
Claim · model-written summary
Full and half chemical fertilizer doses had no effect on seed oil content.
- Taxon
- Brassica carinataBrassica carinatae1
- Treatment
- chemical fertilizers at full and half dosee2
- Outcome
- oil content of seede2
- Direction
- no_changeinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e2“The chemical fertilizers at full and half dose significantly increased the chlorophyll, carotenoids, and protein content of leaves and the seed yield (in kilogram per hectare) but had no effect on the oil content of seed”
Claim · model-written summary
Erucic acid content in the seed of Brassica carinata was increased.
- Taxon
- Brassica carinataBrassica carinatae1
- Outcome
- erucic acid (C22:1) contente3
- Direction
- increasede3
- Qualifier
- present in the seede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e3“The erucic acid (C22:1) content present in the seed was increased”
Claim · model-written summary
Azospirillum performed better than Azotobacter as a bioinoculant on Brassica carinata.
- Taxon
- Brassica carinataBrassica carinatae1
- Treatment
- Azospirillume4
- Interactor
- Azospirillum
Azospirillume4symbiont - Second interactor
- Azotobacter
Azotobactere4symbiont - Outcome
- performed bettere4
- Direction
- bettere4
- Comparator
- Azotobactere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e4“Azospirillum performed better than Azotobacter and its effect was at par with full dose of chemical fertilizers (CFF) for pigments and protein content of leaves when inoculated in the presence of half dose of chemical fertilizers (SPH)”
Claim · model-written summary
Azospirillum with half-dose fertilizer matched full-dose fertilizer for leaf pigment and protein content.
- Taxon
- Brassica carinataBrassica carinatae1
- Organ / stage
- leavese4
- Treatment
- when inoculated in the presence of half dose of chemical fertilizers (SPH)e4
- Interactor
- AzospirillumAzospirillume4symbiont
- Outcome
- pigments and protein content of leavese4
- Direction
- no_changeinferrede4
- Comparator
- full dose of chemical fertilizers (CFF)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e4“Azospirillum performed better than Azotobacter and its effect was at par with full dose of chemical fertilizers (CFF) for pigments and protein content of leaves when inoculated in the presence of half dose of chemical fertilizers (SPH)”
Claim · model-written summary
Azospirillum increased seed yield and seed size of Brassica carinata.
- Taxon
- Brassica carinataBrassica carinatae1
- Treatment
- Azospirillume4
- Interactor
- AzospirillumAzospirillume4symbiont
- Outcome
- seed yield and seed sizee5
- Direction
- greatere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e4“Azospirillum performed better than Azotobacter and its effect was at par with full dose of chemical fertilizers (CFF) for pigments and protein content of leaves when inoculated in the presence of half dose of chemical fertilizers (SPH)”
e5“The seed yield and seed size were greater”
Claim · model-written summary
Supplementing Azospirillum with half-dose fertilizer augmented growth and yield of Brassica carinata.
- Taxon
- Brassica carinataBrassica carinatae1
- Treatment
- Supplementing Azospirillum with SPHe6
- Interactor
- AzospirillumAzospirillume6symbiont
- Outcome
- growth and yielde6
- Direction
- augmente6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e6“Supplementing Azospirillum with SPH assisted Azospirillum to augment the growth and yield, reduced the erucic acid (C22:1) and glucosinolates contents, and increased the unsaturation in seed oil”
Claim · model-written summary
Supplementing Azospirillum with half-dose fertilizer reduced erucic acid and glucosinolate contents of Brassica carinata seed.
- Taxon
- Brassica carinataBrassica carinatae1
- Treatment
- Supplementing Azospirillum with SPHe6
- Interactor
- AzospirillumAzospirillume6symbiont
- Outcome
- erucic acid (C22:1) and glucosinolates contentse6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e6“Supplementing Azospirillum with SPH assisted Azospirillum to augment the growth and yield, reduced the erucic acid (C22:1) and glucosinolates contents, and increased the unsaturation in seed oil”
Claim · model-written summary
Supplementing Azospirillum with half-dose fertilizer increased unsaturation of Brassica carinata seed oil.
- Taxon
- Brassica carinataBrassica carinatae1
- Treatment
- Supplementing Azospirillum with SPHe6
- Interactor
- AzospirillumAzospirillume6symbiont
- Outcome
- unsaturation in seed oile6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e6“Supplementing Azospirillum with SPH assisted Azospirillum to augment the growth and yield, reduced the erucic acid (C22:1) and glucosinolates contents, and increased the unsaturation in seed oil”
Claim · model-written summary
A. brasilense could be applied as an efficient bioinoculant for Brassica carinata at low fertilizer costs.
- Taxon
- Brassica carinataBrassica carinatae1
- Interactor
- A. brasilense
Azospirillum brasilensee7symbiont - Outcome
- A. brasilense could be applied as an efficient bioinoculante7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“growth, seed yield, and oil quality of Brassica carinata (L.) cv. Peela Raya”
e7“It is inferred that A. brasilense could be applied as an efficient bioinoculant for enhancing the growth, seed yield, and oil quality”
The same questions in other papers
fertilization · quality: oil · Brassica carinata (Ethiopian mustard)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
fertilization · yield · Brassica carinata (Ethiopian mustard)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.