Paper · 2008 · Journal of Sustainable Agriculture

Effectiveness of Organic-/Bio-Fertilizer Supplemented with Chemical Fertilizers for Improving Soil Water Retention, Aggregate Stability, Growth and Nutrient Uptake of Maize(Zea maysL.)

Rizwan Ahmad; Muhammad Arshad; Azeem Khalid; et al.

7
claims
10
verbatim quotes
62
citations
2
research areas
—
Not open access

Abstract

Abstract In this study, an organic-fertilizer was prepared by composting fruit and vegetable wastes in a locally fabricated unit and enriching it with N applied at the rate of 147 g kg−1 compost. This “organic-fertilizer” was also used as a carrier for PGPR strain, Pseudomonas fluorescens biotype G (N3) containing ACC-deaminase to formulate a bio-fertilizer. The organic- and/or bio-fertilizers were applied at 300 kg ha−1 to maize in pots/plots supplemented with 0, 88 or 132 kg ha−1 urea-N. A basal dose of P and K (100 and 50 kg ha−1, respectively) was applied to all pots/plots. Results of two-years' pot and field trials revealed that the organic-fertilizer supplemented with 88 kg ha−1 N was equally effective compared to full dose of N-fertilizer (175 kg ha−1) in improving root weight, fresh biomass, and ear and grain yields of maize. However, bio-fertilizer supplemented either with 88 or 132 kg N ha −1 significantly increased the growth and yield of maize over full dose of N-fertilizer and exhibited superiority over organic-fertilizer. Organic-/bio-fertilizer application significantly enhanced N and P uptakes while substantially reducing the rate of water loss from the soil and increased aggregate stability. Results may imply that organic waste could be composted into value-added soil amendment by enriching/blending it with N and PGPR containing ACC-deaminase activity. The novelty of this approach is that the organic- or bio-fertilizer was used at a low rate (just 300 kg ha−1). Moreover, this strategy could also be useful to protect our environments against threat posed by organic wastes.

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with 88 kg ha−1 N was equally effective as full-dose N fertilizer for maize root weight and fresh biomass.

Taxon
maizeZea mayse0
Treatment
organic-fertilizer supplemented with 88 kg ha−1 Ne0
Outcome
root weight, fresh biomasse0
Direction
equally effectivee0
Comparator
full dose of N-fertilizer (175 kg ha−1)e0

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“organic-fertilizer supplemented with 88 kg ha−1 N was equally effective compared to full dose of N-fertilizer (175 kg ha−1) in improving root weight, fresh biomass, and ear and grain yields of maize”

✓ located verbatim in the source · abstract, characters 646–844 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic fertilizer with 88 kg ha−1 N was equally effective as full-dose N fertilizer for maize ear and grain yields.

Taxon
maizeZea mayse0
Treatment
organic-fertilizer supplemented with 88 kg ha−1 Ne0
Outcome
ear and grain yieldse0
Direction
equally effectivee0
Comparator
full dose of N-fertilizer (175 kg ha−1)e0

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“organic-fertilizer supplemented with 88 kg ha−1 N was equally effective compared to full dose of N-fertilizer (175 kg ha−1) in improving root weight, fresh biomass, and ear and grain yields of maize”

✓ located verbatim in the source · abstract, characters 646–844 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Bio-fertilizer with 88 or 132 kg N ha −1 significantly increased maize growth and yield over full-dose N fertilizer.

Taxon
maizeZea mayse0
Treatment
bio-fertilizer supplemented either with 88 or 132 kg N ha −1e0
Outcome
growth and yield of maizee0
Direction
increasede0
Comparator
full dose of N-fertilizere0

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“bio-fertilizer supplemented either with 88 or 132 kg N ha −1 significantly increased the growth and yield of maize over full dose of N-fertilizer and exhibited superiority over organic-fertilizer”

✓ located verbatim in the source · abstract, characters 855–1050 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Bio-fertilizer was superior to organic fertilizer for maize growth and yield.

Taxon
maizeZea mayse0
Treatment
bio-fertilizer supplemented either with 88 or 132 kg N ha −1e0
Outcome
growth and yield of maizee0
Direction
superioritye0
Comparator
organic-fertilizere0

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“bio-fertilizer supplemented either with 88 or 132 kg N ha −1 significantly increased the growth and yield of maize over full dose of N-fertilizer and exhibited superiority over organic-fertilizer”

✓ located verbatim in the source · abstract, characters 855–1050 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Organic and bio-fertilizer application significantly enhanced maize N and P uptake.

Taxon
maizeZea mayst0
Treatment
Organic-/bio-fertilizer applicatione0
Outcome
N and P uptakese0
Direction
enhancede0

Not reportedComparator

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Organic-/bio-fertilizer application significantly enhanced N and P uptakes”

✓ located verbatim in the source · abstract, characters 1052–1126 · show in text ↑
t0

“Maize”

✓ located verbatim in the source · title, characters 167–172 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic and bio-fertilizer application reduced soil water loss.

Taxon
maizeZea mayst0
Treatment
Organic-/bio-fertilizer applicatione0
Outcome
rate of water loss from the soile0
Direction
reducinge0

Not reportedComparator

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Organic-/bio-fertilizer application significantly enhanced N and P uptakes while substantially reducing the rate of water loss from the soil and increased aggregate stability”

✓ located verbatim in the source · abstract, characters 1052–1226 · show in text ↑
t0

“Maize”

✓ located verbatim in the source · title, characters 167–172 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Organic and bio-fertilizer application increased soil aggregate stability.

Taxon
maizeZea mayst0
Treatment
Organic-/bio-fertilizer applicatione0
Outcome
aggregate stabilitye0
Direction
increasede0

Not reportedComparator

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Organic-/bio-fertilizer application significantly enhanced N and P uptakes while substantially reducing the rate of water loss from the soil and increased aggregate stability”

✓ located verbatim in the source · abstract, characters 1052–1226 · show in text ↑
t0

“Maize”

✓ located verbatim in the source · title, characters 167–172 · show in text ↑

inoculation · soil: physics · Zea mays (maize)Positive and negative results

11 papers: 8 positive, 3 negative or no effect

7 papers in the same direction as this paper · 3 in the opposite direction

  1. negative
  2. negative
  3. no effect

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organic · growth · Zea mays (maize)Positive and negative results

129 papers: 115 positive, 14 negative or no effect

114 papers in the same direction as this paper · 11 in the opposite direction · 3 reporting no difference from an alternative

  1. no effect
  2. negative
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organic · yield · Zea mays (maize)Positive and negative results

373 papers: 330 positive, 43 negative or no effect

329 papers in the same direction as this paper · 32 in the opposite direction · 11 reporting no difference from an alternative

  1. no effect
  2. negative
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inoculation · yield · Zea mays (maize)Positive and negative results

538 papers: 479 positive, 59 negative or no effect

478 papers in the same direction as this paper · 52 in the opposite direction · 7 reporting no difference from an alternative

  1. positive
  2. no effect
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nitrogen · yield · Zea mays (maize)Positive and negative results

2,185 papers: 1,906 positive, 279 negative or no effect

1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative

  1. positive
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inoculation · physiology: water · Zea mays (maize)Results agree

31 papers: 31 positive, 0 negative or no effect

30 papers in the same direction as this paper

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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.