Paper · 2019 · UWA Profiles and Research Repository (University of Western Australia)

Resistance to ammonium toxicity in canola genotypes

Al-Awad, Omar

3
claims
6
verbatim quotes
0
citations
2
research areas
✓
Open access

Abstract

Canola (Brassica napus L) is a major oil crop that is sensitive to soil ammonium concentrations. The objective of this thesis was to characterise the resistance of canola genotypes under varying soil ammonium concentrations at various growth stages, and evaluate strategies to mitigate ammonium toxicity. We identified the relative sensitivity of canola genotypes, and demonstrated that ammonium toxicity can be alleviated by increasing the proportion of nitrate in the mixed ammonium: nitrate supply, and by adding oil mallee biochar at the rate of 20 t/ha.

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Claims 3

Observationobservedoriginal resultmeasured

Claim · model-written summary

Canola genotypes differed in their relative sensitivity to ammonium toxicity.

Taxon
Canola (Brassica napus L)Brassica napuse0
Material
canola genotypese1
Outcome
relative sensitivitye1

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

Brassica napus
Brassica napus · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Canola (Brassica napus L) is a major oil crop”

✓ located verbatim in the source · abstract, characters 0–45 · show in text ↑
e1

“We identified the relative sensitivity of canola genotypes”

✓ located verbatim in the source · abstract, characters 305–363 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Increasing the nitrate share of the mixed ammonium:nitrate supply alleviated ammonium toxicity in canola.

Taxon
Canola (Brassica napus L)Brassica napuse0
Treatment
increasing the proportion of nitrate in the mixed ammonium: nitrate supplye2
Outcome
ammonium toxicitye2
Direction
alleviatede2

Not reportedComparator

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

Brassica napus
Brassica napus · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Canola (Brassica napus L) is a major oil crop”

✓ located verbatim in the source · abstract, characters 0–45 · show in text ↑
e2

“ammonium toxicity can be alleviated by increasing the proportion of nitrate in the mixed ammonium: nitrate supply”

✓ located verbatim in the source · abstract, characters 387–500 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Adding oil mallee biochar at 20 t/ha alleviated ammonium toxicity in canola.

Taxon
Canola (Brassica napus L)Brassica napuse0
Treatment
oil mallee biochar at the rate of 20 t/hae3
Outcome
ammonium toxicitye3
Direction
alleviatede3
Value
20 t/hae3

Not reportedComparator

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

Brassica napus
Brassica napus · TaxonDidier Descouens · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Canola (Brassica napus L) is a major oil crop”

✓ located verbatim in the source · abstract, characters 0–45 · show in text ↑
e3

“ammonium toxicity can be alleviated by increasing the proportion of nitrate in the mixed ammonium: nitrate supply, and by adding oil mallee biochar at the rate of 20 t/ha”

✓ located verbatim in the source · abstract, characters 387–557 · show in text ↑

nitrogen · pest · Brassica napus (oilseed rape)Positive and negative results

5 papers: 2 positive, 3 negative or no effect

1 paper in the same direction as this paper · 3 in the opposite direction

  1. no effect
  2. negative
  3. negative

1 paper more in this group

See all 5 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.