Paper · 2025 · An-Najah University Journal for Research - A (Natural Sciences)

Comparative Study of Biological and Chemical Fertilizers as a Stimulator of Physiological and Growth Parameters of Triticum aestivum L.

Enas F. Naji; Hiba F. Abdulfatah; Ali A. Alrawi; et al.

10
claims
32
verbatim quotes
0
citations
3
research areas
✓
Open access · cc-by-nc

Abstract

Chemical fertilizers have been extensively used in agriculture to boost crop production. Despite their proven effectiveness, they pose significant environmental and health risks. In response, researchers have explored sustainable alternatives that can enhance productivity while reducing ecological impact. Biofertilizers have emerged as a promising solution. Hence, the idea of this research came to conduct a comparison between a chemical fertilizer (NPK) and two types of biological fertilizers (Bacillus megaterium and Pseudomonas putida ) in their effect on some physiological and growth characteristics of three varieties of Triticum aestivum (Abu Ghraib, Al-Fath and Al-Rashidiya). Ten milliliters of biofertilizers (as broth culture) were added to the rhizosphere and NPK was added with 1% concentration. The variables measured on the plants under examination included shoot dry weight, total chlorophyll and carotenes content, soot content of N, proteins, K, and P. Results showed that the biofertilizers used in the current study increased the level of all studied traits when compared to the NPK fertilizer. Biofertilizers augmented the nitrogen concentration within the plants by 51.8% and 60.4%, with identical percentages observed for the protein content. Furthermore, they enhanced the potassium concentration in the plants by 26.8% and 27.32%, as these percentages appeared under the influence of Bacillus and Pseudomonas respectively. The highest phosphorus content appeared for Bacillus treatments, represented by the value 1.93%. The three varieties of wheat showed different responses to the fertilizers used in the study, but Al-Rashidia variety showed the greatest response to the fertilizers for most of the studied traits.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. 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 10

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Biofertilizers raised shoot dry weight, total chlorophyll, and carotenes relative to NPK.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
biofertilizerse0
Outcome
shoot dry weight, total chlorophyll and carotenes contente1
Direction
increasede0
Comparator
NPK fertilizere0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“biofertilizers used in the current study increased the level of all studied traits when compared to the NPK fertilizer”

✓ located verbatim in the source · abstract, characters 999–1117 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
e1

“shoot dry weight, total chlorophyll and carotenes content”

✓ located verbatim in the source · abstract, characters 877–934 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bacillus biofertilizer increased plant nitrogen concentration by 51.8%.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
Bacillus megateriume1
Interactor
Bacillus megateriumPriestia megateriume1symbiont
Outcome
nitrogen concentration within the plantse0
Direction
augmentede0
Value
51.8%e0
Comparator
NPK fertilizere2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Priestia megaterium
Priestia megaterium · InteractorOsmoregulator / Osmoregulator at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Biofertilizers augmented the nitrogen concentration within the plants by 51.8% and 60.4%”

✓ located verbatim in the source · abstract, characters 1119–1207 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
e1

“Bacillus megaterium and Pseudomonas putida”

✓ located verbatim in the source · abstract, characters 499–541 · show in text ↑
e2

“when compared to the NPK fertilizer”

✓ located verbatim in the source · abstract, characters 1082–1117 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pseudomonas biofertilizer increased plant nitrogen concentration by 60.4%.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
Pseudomonas putidae1
Interactor
Pseudomonas putidaPseudomonas putidae1symbiont
Outcome
nitrogen concentration within the plantse0
Direction
augmentede0
Value
60.4%e0
Comparator
NPK fertilizere2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Pseudomonas putida
Pseudomonas putida · InteractorMroghair · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Biofertilizers augmented the nitrogen concentration within the plants by 51.8% and 60.4%”

✓ located verbatim in the source · abstract, characters 1119–1207 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
e1

“Bacillus megaterium and Pseudomonas putida”

✓ located verbatim in the source · abstract, characters 499–541 · show in text ↑
e2

“when compared to the NPK fertilizer”

✓ located verbatim in the source · abstract, characters 1082–1117 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bacillus biofertilizer raised plant protein content by 51.8%.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
Bacillus megateriume1
Interactor
Bacillus megateriumPriestia megateriume1symbiont
Outcome
protein contente0
Direction
augmentede3
Value
51.8%e3
Comparator
NPK fertilizere2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Priestia megaterium
Priestia megaterium · InteractorOsmoregulator / Osmoregulator at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“with identical percentages observed for the protein content”

✓ located verbatim in the source · abstract, characters 1209–1268 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
e1

“Bacillus megaterium and Pseudomonas putida”

✓ located verbatim in the source · abstract, characters 499–541 · show in text ↑
e2

“when compared to the NPK fertilizer”

✓ located verbatim in the source · abstract, characters 1082–1117 · show in text ↑
e3

“augmented the nitrogen concentration within the plants by 51.8% and 60.4%”

✓ located verbatim in the source · abstract, characters 1134–1207 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pseudomonas biofertilizer raised plant protein content by 60.4%.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
Pseudomonas putidae1
Interactor
Pseudomonas putidaPseudomonas putidae1symbiont
Outcome
protein contente0
Direction
augmentede3
Value
60.4%e3
Comparator
NPK fertilizere2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Pseudomonas putida
Pseudomonas putida · InteractorMroghair · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“with identical percentages observed for the protein content”

✓ located verbatim in the source · abstract, characters 1209–1268 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
e1

“Bacillus megaterium and Pseudomonas putida”

✓ located verbatim in the source · abstract, characters 499–541 · show in text ↑
e2

“when compared to the NPK fertilizer”

✓ located verbatim in the source · abstract, characters 1082–1117 · show in text ↑
e3

“augmented the nitrogen concentration within the plants by 51.8% and 60.4%”

✓ located verbatim in the source · abstract, characters 1134–1207 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bacillus biofertilizer raised plant potassium concentration by 26.8%.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
Bacilluse0
Interactor
Bacilluse0symbiont
Outcome
potassium concentration in the plantse0
Direction
enhancede0
Value
26.8%e0
Comparator
NPK fertilizere1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“they enhanced the potassium concentration in the plants by 26.8% and 27.32%, as these percentages appeared under the influence of Bacillus and Pseudomonas respectively”

✓ located verbatim in the source · abstract, characters 1283–1450 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
e1

“when compared to the NPK fertilizer”

✓ located verbatim in the source · abstract, characters 1082–1117 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Pseudomonas biofertilizer raised plant potassium concentration by 27.32%.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
Pseudomonase0
Interactor
PseudomonasPseudomonase0symbiont
Outcome
potassium concentration in the plantse0
Direction
enhancede0
Value
27.32%e0
Comparator
NPK fertilizere1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗
Pseudomonas
Pseudomonas · Interactor · picture of the genus (one of its species)CDC · Public domain · Wikimedia Commons ↗

Verbatim

e0

“they enhanced the potassium concentration in the plants by 26.8% and 27.32%, as these percentages appeared under the influence of Bacillus and Pseudomonas respectively”

✓ located verbatim in the source · abstract, characters 1283–1450 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
e1

“when compared to the NPK fertilizer”

✓ located verbatim in the source · abstract, characters 1082–1117 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bacillus treatment gave the highest phosphorus content at 1.93%.

Taxon
Triticum aestivumTriticum aestivumt0
Treatment
Bacillus treatmentse0
Interactor
Bacilluse0symbiont
Outcome
phosphorus contente0
Direction
higheste0
Value
1.93%e0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The highest phosphorus content appeared for Bacillus treatments, represented by the value 1.93%”

✓ located verbatim in the source · abstract, characters 1452–1547 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

The three wheat varieties responded differently to fertilizers.

Material
three varieties of wheate0
Outcome
different responses to the fertilizerse0

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The three varieties of wheat showed different responses to the fertilizers used in the study”

✓ located verbatim in the source · abstract, characters 1549–1641 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Al-Rashidia had the greatest response for most studied traits.

Taxon
Al-Rashidiae0
Material
Al-Rashidiae0
Outcome
greatest response to the fertilizers for most of the studied traitse0
Direction
greateste0

Verbatim

e0

“Al-Rashidia variety showed the greatest response to the fertilizers for most of the studied traits”

✓ located verbatim in the source · abstract, characters 1647–1745 · show in text ↑
t0

“Triticum aestivum L.”

✓ located verbatim in the source · title, characters 115–135 · show in text ↑

Priestia megaterium · quality: protein · Triticum aestivum (wheat)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

Pseudomonas putida · nutrient: content · Triticum aestivum (wheat)Results agree

4 papers: 4 positive, 0 negative or no effect

3 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive
See all 4 papers →

Priestia megaterium · nutrient: content · Triticum aestivum (wheat)Results agree

8 papers: 8 positive, 0 negative or no effect

7 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

4 papers more in this group

See all 8 papers →

Pseudomonas · nutrient: content · Triticum aestivum (wheat)Results agree

11 papers: 11 positive, 0 negative or no effect

10 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

7 papers more in this group

See all 11 papers →

inoculation · physiology: pigments · Triticum aestivum (wheat)Positive and negative results

82 papers: 76 positive, 6 negative or no effect

75 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. negative
  3. no effect

78 papers more in this group

See all 82 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.