Paper · 2024 · Plants

Integrating NDVI, SPAD, and Canopy Temperature for Strategic Nitrogen and Seeding Rate Management to Enhance Yield, Quality, and Sustainability in Wheat Cultivation

Oussama Hnizil; Aziz Baidani; Ilham Khlila; et al.

7
claims
13
verbatim quotes
21
citations
3
research areas
✓
Open access · cc-by

Abstract

This study explores the interplay between nitrogen doses and seeding rates on wheat yield, biomass, and protein content. Utilizing tools such as the Normalized Difference Vegetation Index (NDVI), Soil Plant Analysis Development (SPAD) measurements, and canopy temperature (CT), we conducted experiments over five growing seasons. The treatments included three nitrogen levels (0, 60, 120 kg/ha) and three seeding rates (300, 400, 500 seeds/m2) in a split-plot design with 90 plots and two replications. Our results show that an intermediate nitrogen dose (60 kg/ha) combined with a moderate seed rate (400 seeds/m2) enhances wheat yield by 22.95%. Reduced nitrogen levels increased protein content, demonstrating wheat’s adaptive mechanisms under nitrogen constraints. NDVI analysis highlighted significant growth during the tillering phase with high nitrogen, emphasizing early-stage nutrient management. SPAD measurements showed that early nitrogen applications boost chlorophyll content, essential for vigorous early growth, while CT data indicate that optimal nitrogen and seed rates can effectively modulate plant stress responses. As crops mature, the predictive capacity of NDVI declines, indicating the need for adjusted nitrogen strategies. Collectively, these findings advocate for refined management of nitrogen and seeding rates, integrating NDVI, SPAD, and CT assessments to enhance yields and promote sustainable agricultural practices while minimizing environmental impacts.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Nitrogen at 60 kg/ha with 400 seeds/m2 increased wheat yield by 22.95%.

Treatment
60 kg/hae0
Outcome
wheat yielde0
Direction
enhancese0
Value
22.95%e0
Qualifier
400 seeds/m2e0

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

“an intermediate nitrogen dose (60 kg/ha) combined with a moderate seed rate (400 seeds/m2) enhances wheat yield by 22.95%”

✓ located verbatim in the source · abstract, characters 525–646 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Reduced nitrogen levels increased wheat protein content.

Treatment
Reduced nitrogen levelse0
Outcome
protein contente0
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

“Reduced nitrogen levels increased protein content”

✓ located verbatim in the source · abstract, characters 648–697 · show in text ↑
t0

“Wheat Cultivation”

✓ located verbatim in the source · title, characters 147–164 · show in text ↑
Observationobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

NDVI showed significant growth during tillering under high nitrogen.

Organ / stage
tillering phasee0
Treatment
high nitrogene0
Outcome
growthe0

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

“NDVI analysis highlighted significant growth during the tillering phase with high nitrogen”

✓ located verbatim in the source · abstract, characters 769–859 · show in text ↑
t0

“Wheat Cultivation”

✓ located verbatim in the source · title, characters 147–164 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early nitrogen applications increased chlorophyll content measured by SPAD.

Treatment
early nitrogen applicationse0
Outcome
chlorophyll contente0
Direction
booste0

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

“SPAD measurements showed that early nitrogen applications boost chlorophyll content”

✓ located verbatim in the source · abstract, characters 906–989 · show in text ↑
t0

“Wheat Cultivation”

✓ located verbatim in the source · title, characters 147–164 · show in text ↑
Intervention effectauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Optimal nitrogen and seed rates modulated plant stress responses according to canopy temperature.

Treatment
optimal nitrogen and seed ratese0
Outcome
plant stress responsese0

Not reportedComparatorDirection

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

“CT data indicate that optimal nitrogen and seed rates can effectively modulate plant stress responses”

✓ located verbatim in the source · abstract, characters 1034–1135 · show in text ↑
t0

“Wheat Cultivation”

✓ located verbatim in the source · title, characters 147–164 · show in text ↑
Method / resourceobservedoriginal resultnegativemeasured

Claim · model-written summary

NDVI predictive capacity declined as crops matured.

Outcome
predictive capacity of NDVIe0
Direction
declinese0

Not reportedComparatorValue

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

“As crops mature, the predictive capacity of NDVI declines”

✓ located verbatim in the source · abstract, characters 1137–1194 · show in text ↑
t0

“Wheat Cultivation”

✓ located verbatim in the source · title, characters 147–164 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend refined nitrogen and seeding-rate management integrating NDVI, SPAD and CT.

Outcome
refined management of nitrogen and seeding ratese0

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

“these findings advocate for refined management of nitrogen and seeding rates, integrating NDVI, SPAD, and CT assessments to enhance yields and promote sustainable agricultural practices while minimizing environmental impacts”

✓ located verbatim in the source · abstract, characters 1264–1488 · show in text ↑
t0

“Wheat Cultivation”

✓ located verbatim in the source · title, characters 147–164 · show in text ↑

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

101 papers: 92 positive, 9 negative or no effect

91 papers in the same direction as this paper · 7 in the opposite direction · 2 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. negative

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nitrogen · quality: protein · Triticum aestivum (wheat)Positive and negative results

454 papers: 400 positive, 54 negative or no effect

399 papers in the same direction as this paper · 47 in the opposite direction · 7 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

450 papers more in this group

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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.