Paper · 2014 · American Journal of Plant Sciences

Growth, Nutrient Content and SPAD Value of Corn in Monoculture and in Intercropping

Anna Christina Sanazário de Oliveira; Fábio Cunha Coelho; Henrique Duarte Vieira; et al.

11
claims
13
verbatim quotes
1
citations
3
research areas
✓
Open access · cc-by

Abstract

The objective of this study was to evaluate the growth, the nutrition, and the intensity of the green color in corn plants in monoculture and in intercropping with Mucuna aterrima, Crotalaria juncea, and Canavalia ensiformis, cultivated with different handlings. In general, corn plants in monoculture demonstrated greater growth and greater SPAD value in the first evaluation, despite presenting lower tenor of phosphorus in the leaves when related to the corn in intercropping. The weed helps in the growth of the corn plant and increases the SPAD value during flowering. The monoculture NPK (Nitrogen, Phosphorus and Potassium) fertilization promoted higher values in corn plant growth, as well as a greater SPAD value, at 30 d.a.e., of the plants. The NPK-fertilized corn plants showed a greater tenor of sulphur and a lower tenor of molybdenum. The corn in intercropping with M. aterrima resulted in smaller plants at 70 d.a.e. It also presented a greater tenor of molybdenum and lower tenor of nickel when compared to intercroppings with C. juncea and with C. ensiformis. The corn plants in a intercropping with Crotalaria juncea presented higher growth at 30 and 70 d.a.e. and greater tenors of molybdenum when compared to the plants in intercropping with C. ensiformis.

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 11

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Monoculture corn had greater early growth and SPAD than intercropped corn.

Treatment
monoculturee0
Outcome
growth and greater SPAD valuee0
Direction
greatere0
Comparator
intercroppingt0

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“corn plants in monoculture demonstrated greater growth and greater SPAD value in the first evaluation”

✓ located verbatim in the source · abstract, characters 275–376 · show in text ↑
t0

“intercropping”

✓ located after whitespace/quote normalisation · title, characters 70–83 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Monoculture corn had lower leaf phosphorus than intercropped corn.

Treatment
monoculturet0
Outcome
tenor of phosphorus in the leavese0
Direction
lowere0
Comparator
intercroppinge0

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“despite presenting lower tenor of phosphorus in the leaves when related to the corn in intercropping”

✓ located verbatim in the source · abstract, characters 378–478 · show in text ↑
t0

“monoculture”

✓ located after whitespace/quote normalisation · title, characters 51–62 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The weed increased corn growth and SPAD during flowering.

Organ / stage
floweringe0
Treatment
weede0
Interactor
weede0weed
Outcome
growth of the corn plant and increases the SPAD valuee0
Direction
increasese0

Not reportedComparator

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The weed helps in the growth of the corn plant and increases the SPAD value during flowering.”

✓ located verbatim in the source · abstract, characters 480–573 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Monoculture NPK fertilization promoted higher growth and SPAD at 30 d.a.e.

Organ / stage
30 d.a.e.e0
Treatment
NPK (Nitrogen, Phosphorus and Potassium) fertilizatione0
Outcome
corn plant growth, as well as a greater SPAD valuee0
Direction
highere0

Not reportedComparator

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The monoculture NPK (Nitrogen, Phosphorus and Potassium) fertilization promoted higher values in corn plant growth, as well as a greater SPAD value, at 30 d.a.e., of the plants.”

✓ located verbatim in the source · abstract, characters 574–751 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

NPK fertilized corn had greater sulphur content.

Treatment
NPK-fertilizede0
Outcome
tenor of sulphure0
Direction
greatere0

Not reportedComparator

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The NPK-fertilized corn plants showed a greater tenor of sulphur and a lower tenor of molybdenum.”

✓ located verbatim in the source · abstract, characters 752–849 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

NPK fertilized corn had lower molybdenum content.

Treatment
NPK-fertilizede0
Outcome
tenor of molybdenume0
Direction
lowere0

Not reportedComparator

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The NPK-fertilized corn plants showed a greater tenor of sulphur and a lower tenor of molybdenum.”

✓ located verbatim in the source · abstract, characters 752–849 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Corn intercropped with M. aterrima was smaller at 70 d.a.e.

Organ / stage
70 d.a.e.e0
Treatment
intercropping with M. aterrimae0
Interactor
M. aterrimaMucuna pruriens var. utilise0other
Outcome
plantse0
Direction
smallere0

Not reportedComparator

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗
Mucuna pruriens var. utilis
Mucuna pruriens var. utilis · Interactor · picture of the speciesDinesh Valke from Thane, India · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The corn in intercropping with M. aterrima resulted in smaller plants at 70 d.a.e.”

✓ located verbatim in the source · abstract, characters 850–932 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Corn with M. aterrima had higher molybdenum than corn with C. juncea or C. ensiformis.

Treatment
M. aterrimae0
Interactor
M. aterrimaMucuna pruriens var. utilise0other
Outcome
tenor of molybdenume0
Direction
greatere0
Comparator
C. juncea and with C. ensiformise0

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗
Mucuna pruriens var. utilis
Mucuna pruriens var. utilis · Interactor · picture of the speciesDinesh Valke from Thane, India · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The corn in intercropping with M. aterrima resulted in smaller plants at 70 d.a.e. It also presented a greater tenor of molybdenum and lower tenor of nickel when compared to intercroppings with C. juncea and with C. ensiformis.”

✓ located verbatim in the source · abstract, characters 850–1077 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Corn with M. aterrima had lower nickel than corn with C. juncea or C. ensiformis.

Treatment
M. aterrimae0
Interactor
M. aterrimaMucuna pruriens var. utilise0other
Outcome
tenor of nickele0
Direction
lowere0
Comparator
C. juncea and with C. ensiformise0

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗
Mucuna pruriens var. utilis
Mucuna pruriens var. utilis · Interactor · picture of the speciesDinesh Valke from Thane, India · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The corn in intercropping with M. aterrima resulted in smaller plants at 70 d.a.e. It also presented a greater tenor of molybdenum and lower tenor of nickel when compared to intercroppings with C. juncea and with C. ensiformis.”

✓ located verbatim in the source · abstract, characters 850–1077 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Corn with Crotalaria juncea grew more at 30 and 70 d.a.e. than corn with C. ensiformis.

Treatment
intercropping with Crotalaria junceae0
Interactor
Crotalaria junceaCrotalaria junceae0other
Outcome
growthe0
Direction
highere0
Comparator
intercropping with C. ensiformise0

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗
Crotalaria juncea
Crotalaria juncea · InteractorA16898 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The corn plants in a intercropping with Crotalaria juncea presented higher growth at 30 and 70 d.a.e. and greater tenors of molybdenum when compared to the plants in intercropping with C. ensiformis.”

✓ located verbatim in the source · abstract, characters 1078–1277 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Corn with Crotalaria juncea had more molybdenum than corn with C. ensiformis.

Treatment
intercropping with Crotalaria junceae0
Interactor
Crotalaria junceaCrotalaria junceae0other
Outcome
tenors of molybdenume0
Direction
greatere0
Comparator
intercropping with C. ensiformise0

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗
Crotalaria juncea
Crotalaria juncea · InteractorA16898 · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The corn plants in a intercropping with Crotalaria juncea presented higher growth at 30 and 70 d.a.e. and greater tenors of molybdenum when compared to the plants in intercropping with C. ensiformis.”

✓ located verbatim in the source · abstract, characters 1078–1277 · show in text ↑

Mucuna pruriens var. utilis · growth · Zea mays (maize)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

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

  1. negative
  2. positive
See all 3 papers →

Mucuna pruriens var. utilis · nutrient: content · Zea mays (maize)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

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

  1. negative
  2. positive
See all 3 papers →

Crotalaria juncea · growth · Zea mays (maize)Positive and negative results

9 papers: 6 positive, 3 negative or no effect

5 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. no effect
  3. no effect

5 papers more in this group

See all 9 papers →

Crotalaria juncea · nutrient: content · Zea mays (maize)Results agree

5 papers: 5 positive, 0 negative or no effect

4 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

intercropping · growth · Zea mays (maize)Results differ

184 papers: 138 positive, 46 negative or no effect

137 papers in the same direction as this paper · 40 in the opposite direction · 6 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. negative

180 papers more in this group

See all 184 papers →

potassium · physiology: pigments · Zea mays (maize)Positive and negative results

22 papers: 20 positive, 2 negative or no effect

19 papers in the same direction as this paper · 2 in the opposite direction

  1. no effect
  2. negative
  3. positive

18 papers more in this group

See all 22 papers →

phosphorus · physiology: pigments · Zea mays (maize)Positive and negative results

27 papers: 22 positive, 5 negative or no effect

21 papers in the same direction as this paper · 5 in the opposite direction

  1. negative
  2. no effect
  3. negative

23 papers more in this group

See all 27 papers →

nitrogen · physiology: pigments · Zea mays (maize)Positive and negative results

126 papers: 112 positive, 14 negative or no effect

111 papers in the same direction as this paper · 13 in the opposite direction · 1 reporting no difference from an alternative

  1. negative
  2. negative
  3. no effect

122 papers more in this group

See all 126 papers →

8 of 11 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.