Paper · 2008 · Journal of Agricultural Chemistry and Biotechnology

ROLE OF NON-SYMBIOTIC N2-FIXING BACTERIA IN OPTIMIZING THE MINERAL NITROGEN FERTILIZER USE OF WHEAT PRODUCTION

Ahlam Mehessen; Manal Aziz; E.A. Moursi; et al.

13
claims
33
verbatim quotes
0
citations
3
research areas
✓
Open access · cc-by

Abstract

Two field trails were carried out at Sakha Agricultural Research Station Farm through the two successive growing seasons of 2006/2007 and 2007/2008 to study the effects of fertilization with five nitrogen levels of 0, 25, 50, 75 and 100 kg N/fed. and applying azospirillum bacteria as effective biofertilizer on yield, yield components, nitrogen percentage and grain protein content of wheat .Split plot design was used, the main plots were assigned by N levels and the sub plots were assigned by biofertilization. The obtained results can be summarized as follows: Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season and from 1.31 to 2.2 ton fed-1 in the second season. Increasing nitrogen fertilizer rates high significantly increased grain yield. The highest mean values of 2.26 and 2.6 ton fed-1 were obtained with 100 kg N fed-1 in the first and second season, respectively. Obtained data clearly illustrated that the mean values of straw yield tons/fed. were increased by increasing nitrogen does up to 100 kg/fed. The highest mean values were recorded and they are 3.03 and 3.12 ton/fed. in the first and second growing seasons, respectively. On the contrary, the lowest mean values were recorded under the control treatment (without nitrogen) of 1.32 and 1.28 ton/fed. in the two growing seasons. The mean values of nitrogen and protein percentages were increased by increasing both of mineral and biofertilizer applications. The mean values for plant height were increased by increasing application of both mineral and biofertilizer. The mean values under biofertilizer application were 96.36 and 97.23 cm. But under non-application treatments the mean values were 62.12 and 61.04 cm in the first and second seasons, respectively. Also, application of mineral fertilizer up to 100 kg/fed. increased wheat plant height. The highest mean values were recorded with 100 kg N fed.-1. The mean values of 1000 grain weight, number of tillers and number of spikes were incased by increasing nitrogen dose up to 100 kg N/fed. Also, application of biofertilization led to increasing the studied parameters in comparison with non-application treatments.

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Claims 13

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Inoculation with biofertilizer significantly increased wheat grain yield by 1.32 to 2.13 ton/fed in the first season.

Treatment
Inoculation with biofertilizere2
Interactor
azospirillumAzospirillume1symbiont
Outcome
grain yielde2
Direction
increasede2
Value
1.32 to 2.13 ton fed.-1e2
Qualifier
in the first seasone2
Setting
Sakha Agricultural Research Station Farme0

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 ↗
Azospirillum
Azospirillum · InteractorFadelblaid · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Two field trails were carried out at Sakha Agricultural Research Station Farm”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e1

“applying azospirillum bacteria as effective biofertilizer”

✓ located verbatim in the source · abstract, characters 251–308 · show in text ↑
e2

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Inoculation with biofertilizer significantly increased wheat grain yield by 1.31 to 2.2 ton/fed in the second season.

Treatment
Inoculation with biofertilizere2
Interactor
azospirillumAzospirillume1symbiont
Outcome
grain yielde2
Direction
increasede2
Value
1.31 to 2.2 ton fed-1e3
Qualifier
in the second seasone3
Setting
Sakha Agricultural Research Station Farme0

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 ↗
Azospirillum
Azospirillum · InteractorFadelblaid · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Two field trails were carried out at Sakha Agricultural Research Station Farm”

✓ located verbatim in the source · abstract, characters 0–77 · show in text ↑
e1

“applying azospirillum bacteria as effective biofertilizer”

✓ located verbatim in the source · abstract, characters 251–308 · show in text ↑
e2

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e3

“from 1.31 to 2.2 ton fed-1 in the second season”

✓ located verbatim in the source · abstract, characters 697–744 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Increasing nitrogen fertilizer rates significantly increased wheat grain yield.

Treatment
Increasing nitrogen fertilizer ratese1
Outcome
grain yielde1
Direction
increasede1

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“Increasing nitrogen fertilizer rates high significantly increased grain yield”

✓ located verbatim in the source · abstract, characters 746–823 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The highest wheat grain yield, 2.26 and 2.6 ton/fed, was obtained with 100 kg N/fed.

Treatment
100 kg N fed-1e1
Outcome
grain yielde0
Direction
higheste1
Value
2.26 and 2.6 ton fed-1e1

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“The highest mean values of 2.26 and 2.6 ton fed-1 were obtained with 100 kg N fed-1 in the first and second season”

✓ located verbatim in the source · abstract, characters 825–939 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing nitrogen up to 100 kg/fed increased wheat straw yield.

Treatment
increasing nitrogen does up to 100 kg/fede1
Outcome
straw yielde1
Direction
increasede1

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“Obtained data clearly illustrated that the mean values of straw yield tons/fed. were increased by increasing nitrogen does up to 100 kg/fed”

✓ located verbatim in the source · abstract, characters 955–1094 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat straw yield with 100 kg N/fed was 3.03 and 3.12 ton/fed in the two seasons.

Outcome
straw yielde1
Value
3.03 and 3.12 ton/fed.e2
Qualifier
in the first and second growing seasonse2

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“Obtained data clearly illustrated that the mean values of straw yield tons/fed. were increased by increasing nitrogen does up to 100 kg/fed”

✓ located verbatim in the source · abstract, characters 955–1094 · show in text ↑
e2

“The highest mean values were recorded and they are 3.03 and 3.12 ton/fed. in the first and second growing seasons”

✓ located verbatim in the source · abstract, characters 1096–1209 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Wheat straw yield was lowest at 1.32 and 1.28 ton/fed under the control without nitrogen.

Treatment
control treatment (without nitrogen)e2
Outcome
straw yielde1
Value
1.32 and 1.28 ton/fed.e2

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“Obtained data clearly illustrated that the mean values of straw yield tons/fed. were increased by increasing nitrogen does up to 100 kg/fed”

✓ located verbatim in the source · abstract, characters 955–1094 · show in text ↑
e2

“the lowest mean values were recorded under the control treatment (without nitrogen) of 1.32 and 1.28 ton/fed.”

✓ located verbatim in the source · abstract, characters 1242–1351 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing both mineral nitrogen and biofertilizer applications increased wheat nitrogen and protein percentages.

Treatment
increasing both of mineral and biofertilizer applicationse1
Outcome
nitrogen and protein percentagese1
Direction
increasede1

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“The mean values of nitrogen and protein percentages were increased by increasing both of mineral and biofertilizer applications”

✓ located verbatim in the source · abstract, characters 1380–1507 · show in text ↑
Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing both mineral and biofertilizer applications increased wheat plant height.

Treatment
increasing application of both mineral and biofertilizere1
Outcome
plant heighte1
Direction
increasede1

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“The mean values for plant height were increased by increasing application of both mineral and biofertilizer”

✓ located verbatim in the source · abstract, characters 1509–1616 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Wheat plants with biofertilizer application were 96.36 and 97.23 cm tall, higher than 62.12 and 61.04 cm without it.

Treatment
biofertilizer applicatione2
Outcome
plant heighte1
Direction
higherinferrede2
Value
96.36 and 97.23 cme2
Comparator
non-application treatmentse3

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“The mean values for plant height were increased by increasing application of both mineral and biofertilizer”

✓ located verbatim in the source · abstract, characters 1509–1616 · show in text ↑
e2

“The mean values under biofertilizer application were 96.36 and 97.23 cm”

✓ located verbatim in the source · abstract, characters 1618–1689 · show in text ↑
e3

“But under non-application treatments the mean values were 62.12 and 61.04 cm in the first and second seasons, respectively”

✓ located verbatim in the source · abstract, characters 1691–1813 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Application of mineral fertilizer up to 100 kg/fed increased wheat plant height.

Treatment
application of mineral fertilizer up to 100 kg/fede0
Outcome
plant heighte0
Direction
increasede0

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

“application of mineral fertilizer up to 100 kg/fed. increased wheat plant height”

✓ located verbatim in the source · abstract, characters 1821–1901 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Wheat plant height was highest with 100 kg N/fed.

Treatment
100 kg N fed.-1e2
Outcome
plant heighte1
Direction
higheste2

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“The mean values for plant height were increased by increasing application of both mineral and biofertilizer”

✓ located verbatim in the source · abstract, characters 1509–1616 · show in text ↑
e2

“The highest mean values were recorded with 100 kg N fed.-1”

✓ located verbatim in the source · abstract, characters 1903–1961 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing nitrogen dose up to 100 kg N/fed increased 1000 grain weight, number of tillers and number of spikes.

Treatment
increasing nitrogen dose up to 100 kg N/fede1
Outcome
1000 grain weight, number of tillers and number of spikese1
Direction
incasede1

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

“Inoculation with biofertilizer high significantly increased wheat grain yield from 1.32 to 2.13 ton fed.-1 in the first season”

✓ located verbatim in the source · abstract, characters 566–692 · show in text ↑
e1

“The mean values of 1000 grain weight, number of tillers and number of spikes were incased by increasing nitrogen dose up to 100 kg N/fed”

✓ located verbatim in the source · abstract, characters 1963–2099 · show in text ↑

inoculation · Azospirillum · Triticum aestivum (wheat)Positive and negative results

10 papers: 9 positive, 1 negative or no effect

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

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inoculation · growth · Triticum aestivum (wheat)Positive and negative results

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fertilization · growth · Triticum aestivum (wheat)Positive and negative results

755 papers: 663 positive, 92 negative or no effect

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nitrogen · yield · Triticum aestivum (wheat)Positive and negative results

2,061 papers: 1,737 positive, 324 negative or no effect

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fertilization · yield · Triticum aestivum (wheat)Positive and negative results

3,438 papers: 3,115 positive, 323 negative or no effect

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  1. no effect
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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.