Paper · 2021 · Annals of Plant and Soil Research

Chlorophyll content and spad value of rice (Oryza sativa l.) under different sowing windows and nutrient management practices

B.P. PATRA

15
claims
30
verbatim quotes
2
citations
2
research areas
✓
Open access

Abstract

The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice using two dates of planting (10th july, 25th july) in main plot and three nutrient management practices (STBFR (Soil test based fertilizer recommendation), STBFR+GM, STBFR+FYM) in sub plot in a split plot design with four replications. Chlorophyll content as well as SPAD values of the crop measured at different growth stages of rice at 30 days interval revealed that chlorophyll a, chlorophyll b, total chlorophyll as well as SPAD values of the crop increased till 60 DAP and thereafter decreased. Early planting recorded higher chlorophyll a value of 2.36 mg g-1 of fresh leaf, chlorophyll b value of 1.26 mg g-1, total chlorophyll value of 3.62 mg g-1 and SPAD value of 44.73, while STBFR + GM treatment registered higher Chlorophyll a value of 2.55 mg g-1, Chlorophyll b value of 1.38 mg g-1, total chlorophyll value of 3.99 mg g-1 and SPAD value of 46.87. Leaf N content as well as grain yield is also found higher in early planting (2.58 %, 5008 kg ha-1) and STBFR + GM (2.74 %, 5015 kg ha-1). Significant positive linear relationship was observed between leaf N content and SPAD value of the crop which ultimately influences grain yield of the crop.

Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 15

Associationobservedoriginal resultmeasured

Claim · model-written summary

Chlorophyll a, chlorophyll b and total chlorophyll of rice increased until 60 DAP and decreased thereafter.

Organ / stage
different growth stagese1
Outcome
chlorophyll a, chlorophyll b, total chlorophylle1
Direction
increasede1
Qualifier
thereafter decreasede1

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e1

“Chlorophyll content as well as SPAD values of the crop measured at different growth stages of rice at 30 days interval revealed that chlorophyll a, chlorophyll b, total chlorophyll as well as SPAD values of the crop increased till 60 DAP and thereafter decreased”

✓ located verbatim in the source · abstract, characters 350–612 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

SPAD values of rice increased until 60 DAP and decreased thereafter.

Organ / stage
different growth stagese1
Outcome
SPAD valuese1
Direction
increasede1
Qualifier
thereafter decreasede1

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e1

“Chlorophyll content as well as SPAD values of the crop measured at different growth stages of rice at 30 days interval revealed that chlorophyll a, chlorophyll b, total chlorophyll as well as SPAD values of the crop increased till 60 DAP and thereafter decreased”

✓ located verbatim in the source · abstract, characters 350–612 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early planting gave higher chlorophyll a in rice (2.36 mg g-1) than the comparison.

Treatment
Early plantinge2
Outcome
chlorophyll a valuee2
Direction
highere2
Value
2.36 mg g-1e2

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e2

“Early planting recorded higher chlorophyll a value of 2.36 mg g-1 of fresh leaf, chlorophyll b value of 1.26 mg g-1, total chlorophyll value of 3.62 mg g-1 and SPAD value of 44.73”

✓ located verbatim in the source · abstract, characters 614–793 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early planting gave higher chlorophyll b in rice (1.26 mg g-1) than the comparison.

Treatment
Early plantinge2
Outcome
chlorophyll b valuee2
Direction
highere2
Value
1.26 mg g-1e2

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e2

“Early planting recorded higher chlorophyll a value of 2.36 mg g-1 of fresh leaf, chlorophyll b value of 1.26 mg g-1, total chlorophyll value of 3.62 mg g-1 and SPAD value of 44.73”

✓ located verbatim in the source · abstract, characters 614–793 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early planting gave higher total chlorophyll in rice (3.62 mg g-1) than the comparison.

Treatment
Early plantinge2
Outcome
total chlorophyll valuee2
Direction
highere2
Value
3.62 mg g-1e2

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e2

“Early planting recorded higher chlorophyll a value of 2.36 mg g-1 of fresh leaf, chlorophyll b value of 1.26 mg g-1, total chlorophyll value of 3.62 mg g-1 and SPAD value of 44.73”

✓ located verbatim in the source · abstract, characters 614–793 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early planting gave a higher SPAD value in rice (44.73) than the comparison.

Treatment
Early plantinge2
Outcome
SPAD valuee2
Direction
highere2
Value
44.73e2

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e2

“Early planting recorded higher chlorophyll a value of 2.36 mg g-1 of fresh leaf, chlorophyll b value of 1.26 mg g-1, total chlorophyll value of 3.62 mg g-1 and SPAD value of 44.73”

✓ located verbatim in the source · abstract, characters 614–793 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

STBFR + GM treatment gave higher chlorophyll a in rice (2.55 mg g-1) than the comparison.

Treatment
STBFR + GM treatmente3
Outcome
Chlorophyll a valuee3
Direction
highere3
Value
2.55 mg g-1e3

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e3

“while STBFR + GM treatment registered higher Chlorophyll a value of 2.55 mg g-1, Chlorophyll b value of 1.38 mg g-1, total chlorophyll value of 3.99 mg g-1 and SPAD value of 46.87”

✓ located verbatim in the source · abstract, characters 795–974 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

STBFR + GM treatment gave higher chlorophyll b in rice (1.38 mg g-1) than the comparison.

Treatment
STBFR + GM treatmente3
Outcome
Chlorophyll b valuee3
Direction
highere3
Value
1.38 mg g-1e3

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e3

“while STBFR + GM treatment registered higher Chlorophyll a value of 2.55 mg g-1, Chlorophyll b value of 1.38 mg g-1, total chlorophyll value of 3.99 mg g-1 and SPAD value of 46.87”

✓ located verbatim in the source · abstract, characters 795–974 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

STBFR + GM treatment gave higher total chlorophyll in rice (3.99 mg g-1) than the comparison.

Treatment
STBFR + GM treatmente3
Outcome
total chlorophyll valuee3
Direction
highere3
Value
3.99 mg g-1e3

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e3

“while STBFR + GM treatment registered higher Chlorophyll a value of 2.55 mg g-1, Chlorophyll b value of 1.38 mg g-1, total chlorophyll value of 3.99 mg g-1 and SPAD value of 46.87”

✓ located verbatim in the source · abstract, characters 795–974 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

STBFR + GM treatment gave a higher SPAD value in rice (46.87) than the comparison.

Treatment
STBFR + GM treatmente3
Outcome
SPAD valuee3
Direction
highere3
Value
46.87e3

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e3

“while STBFR + GM treatment registered higher Chlorophyll a value of 2.55 mg g-1, Chlorophyll b value of 1.38 mg g-1, total chlorophyll value of 3.99 mg g-1 and SPAD value of 46.87”

✓ located verbatim in the source · abstract, characters 795–974 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early planting gave higher leaf N content in rice (2.58 %) than the comparison.

Treatment
early plantinge4
Outcome
Leaf N contente4
Direction
highere4
Value
2.58 %e4

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e4

“Leaf N content as well as grain yield is also found higher in early planting (2.58 %, 5008 kg ha-1) and STBFR + GM (2.74 %, 5015 kg ha-1)”

✓ located verbatim in the source · abstract, characters 976–1113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Early planting gave higher grain yield in rice (5008 kg ha-1) than the comparison.

Treatment
early plantinge4
Outcome
grain yielde4
Direction
highere4
Value
5008 kg ha-1e4

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e4

“Leaf N content as well as grain yield is also found higher in early planting (2.58 %, 5008 kg ha-1) and STBFR + GM (2.74 %, 5015 kg ha-1)”

✓ located verbatim in the source · abstract, characters 976–1113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

STBFR + GM gave higher leaf N content in rice (2.74 %) than the comparison.

Treatment
STBFR + GMe4
Outcome
Leaf N contente4
Direction
highere4
Value
2.74 %e4

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e4

“Leaf N content as well as grain yield is also found higher in early planting (2.58 %, 5008 kg ha-1) and STBFR + GM (2.74 %, 5015 kg ha-1)”

✓ located verbatim in the source · abstract, characters 976–1113 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

STBFR + GM gave higher grain yield in rice (5015 kg ha-1) than the comparison.

Treatment
STBFR + GMe4
Outcome
grain yielde4
Direction
highere4
Value
5015 kg ha-1e4

Not reportedComparator

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e4

“Leaf N content as well as grain yield is also found higher in early planting (2.58 %, 5008 kg ha-1) and STBFR + GM (2.74 %, 5015 kg ha-1)”

✓ located verbatim in the source · abstract, characters 976–1113 · show in text ↑
Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Leaf N content and SPAD value of rice are positively and linearly related.

Organ / stage
leafe5
Outcome
leaf N content and SPAD valuee5
Direction
positivee5

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

Oryza sativa
Oryza sativa · Taxon · picture from its Wikimedia Commons categoryDesmanthus4food · CC BY-SA 3.0 us · Wikimedia Commons ↗

Verbatim

e0

“The field experiment was conducted during kharif seasons of 2018 and 2019 in Agronomy research farm ,OUAT on rice”

✓ located verbatim in the source · abstract, characters 0–113 · show in text ↑
e5

“Significant positive linear relationship was observed between leaf N content and SPAD value of the crop”

✓ located verbatim in the source · abstract, characters 1115–1218 · show in text ↑

transgenic · physiology: pigments · Oryza sativa (rice)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 →

sowing time · physiology: pigments · Oryza sativa (rice)Positive and negative results

4 papers: 3 positive, 1 negative or no effect

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

  1. negative
  2. positive
  3. positive
See all 4 papers →

sowing time · nutrient: content · Oryza sativa (rice)Positive and negative results

9 papers: 7 positive, 2 negative or no effect

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

  1. negative
  2. negative
  3. positive

5 papers more in this group

See all 9 papers →

transgenic · nutrient: content · Oryza sativa (rice)Positive and negative results

30 papers: 25 positive, 5 negative or no effect

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

  1. no effect
  2. no effect
  3. no effect

26 papers more in this group

See all 30 papers →

transgenic · yield · Oryza sativa (rice)Positive and negative results

102 papers: 81 positive, 21 negative or no effect

80 papers in the same direction as this paper · 18 in the opposite direction · 3 reporting no difference from an alternative

  1. no effect
  2. negative
  3. negative

98 papers more in this group

See all 102 papers →

sowing time · yield · Oryza sativa (rice)Positive and negative results

193 papers: 123 positive, 70 negative or no effect

122 papers in the same direction as this paper · 68 in the opposite direction · 2 reporting no difference from an alternative

  1. no effect
  2. negative
  3. no effect

189 papers more in this group

See all 193 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.