Paper · 2012 · Journal of Hebei Agricultural Sciences

Study on the Photosynthetic Characteristics of Intercropping System of Maize and Soybean

Zhongkuan Liu

15
claims
15
verbatim quotes
3
citations
2
research areas
—
Not open access

Abstract

Intercropping was a kind of planting mode which could intensively use light,heat,fertilizer,water and other natural resources.Different intercropping modes had different influence on the light energy utilization rate of crop group.Under the maize-soybean intercropping mode of 2∶ 2,2∶ 3 and 2∶ 4,taking single cropped maize and single cropped soybean as the control,the effects of different planting modes on the photosynthetic characteristic indexes of maize and soybean were studied.The results showed that intercropping could improve the light energy utilization rate of maize.The photosynthetic rate,chlorophyll content and leaf area index of intercropped maize increased by 22.4%-24.7%,9.2%-12.0% and 0.9%-3.5%,respectively than single cropped maize,and the photosynthetic rate and chlorophyll content differences were significant.Intercropping decreased the light energy utilization rate of soybean.The photosynthetic rate,chlorophyll content and leaf area index of intercropped soybean decreased by 3.5%-12.6%,1.6%-4.0% and 0.3%-0.5%,respectively than single cropped soybean,while the differences were all not significant.In maize and soybean intercropping system,with the increasing of large row spacing of maize,the chlorophyll content and leaf area index of maize increased,the photosynthetic rate of maize increased at first and decreased later,it was the highest in the intercropping system of 2∶ 3,and the photosynthetic rate,chlorophyll content and leaf area index of soybean increased,while the differences in the photosynthetic characteristics indexes among three intercropping modes were all not significant.The light energy utilization rate of maize and soybean intercropping system of 2∶ 3 was the highest.

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Claims 15

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Intercropping improved light energy utilization in maize.

Taxon
maizeZea mayse0
Treatment
intercroppinge0
Outcome
light energy utilization ratee0
Direction
improvee0

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

“intercropping could improve the light energy utilization rate of maize”

✓ located verbatim in the source · abstract, characters 509–579 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Intercropped maize had increased photosynthetic rate by 22.4%-24.7%.

Taxon
maizeZea mayse0
Treatment
intercropped maizee0
Outcome
photosynthetic ratee0
Direction
increasede0
Value
22.4%-24.7%e0
Comparator
single cropped maizee0

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

“The photosynthetic rate,chlorophyll content and leaf area index of intercropped maize increased by 22.4%-24.7%,9.2%-12.0% and 0.9%-3.5%,respectively than single cropped maize,and the photosynthetic rate and chlorophyll content differences were significant.”

✓ located verbatim in the source · abstract, characters 580–836 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Intercropped maize had increased chlorophyll content by 9.2%-12.0%.

Taxon
maizeZea mayse0
Treatment
intercropped maizee0
Outcome
chlorophyll contente0
Direction
increasede0
Value
9.2%-12.0%e0
Comparator
single cropped maizee0

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

“The photosynthetic rate,chlorophyll content and leaf area index of intercropped maize increased by 22.4%-24.7%,9.2%-12.0% and 0.9%-3.5%,respectively than single cropped maize,and the photosynthetic rate and chlorophyll content differences were significant.”

✓ located verbatim in the source · abstract, characters 580–836 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Intercropped maize had increased leaf area index by 0.9%-3.5%.

Taxon
maizeZea mayse0
Treatment
intercropped maizee0
Outcome
leaf area indexe0
Direction
increasede0
Value
0.9%-3.5%e0
Comparator
single cropped maizee0

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

“The photosynthetic rate,chlorophyll content and leaf area index of intercropped maize increased by 22.4%-24.7%,9.2%-12.0% and 0.9%-3.5%,respectively than single cropped maize,and the photosynthetic rate and chlorophyll content differences were significant.”

✓ located verbatim in the source · abstract, characters 580–836 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping decreased soybean light energy utilization.

Taxon
soybeanGlycine maxe0
Treatment
Intercroppinge0
Outcome
light energy utilization ratee0
Direction
decreasede0

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“Intercropping decreased the light energy utilization rate of soybean”

✓ located verbatim in the source · abstract, characters 836–904 · show in text ↑
Intervention effectobservedoriginal resultnegativenot significant (as stated)measured

Claim · model-written summary

Intercropped soybean had decreased photosynthetic rate by 3.5%-12.6%, without a significant difference.

Taxon
soybeanGlycine maxe0
Treatment
intercropped soybeane0
Outcome
photosynthetic ratee0
Direction
decreasede0
Value
3.5%-12.6%e0
Comparator
single cropped soybeane0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“The photosynthetic rate,chlorophyll content and leaf area index of intercropped soybean decreased by 3.5%-12.6%,1.6%-4.0% and 0.3%-0.5%,respectively than single cropped soybean,while the differences were all not significant.”

✓ located verbatim in the source · abstract, characters 905–1129 · show in text ↑
Intervention effectobservedoriginal resultnegativenot significant (as stated)measured

Claim · model-written summary

Intercropped soybean had decreased chlorophyll content by 1.6%-4.0%, without a significant difference.

Taxon
soybeanGlycine maxe0
Treatment
intercropped soybeane0
Outcome
chlorophyll contente0
Direction
decreasede0
Value
1.6%-4.0%e0
Comparator
single cropped soybeane0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“The photosynthetic rate,chlorophyll content and leaf area index of intercropped soybean decreased by 3.5%-12.6%,1.6%-4.0% and 0.3%-0.5%,respectively than single cropped soybean,while the differences were all not significant.”

✓ located verbatim in the source · abstract, characters 905–1129 · show in text ↑
Intervention effectobservedoriginal resultnegativenot significant (as stated)measured

Claim · model-written summary

Intercropped soybean had decreased leaf area index by 0.3%-0.5%, without a significant difference.

Taxon
soybeanGlycine maxe0
Treatment
intercropped soybeane0
Outcome
leaf area indexe0
Direction
decreasede0
Value
0.3%-0.5%e0
Comparator
single cropped soybeane0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“The photosynthetic rate,chlorophyll content and leaf area index of intercropped soybean decreased by 3.5%-12.6%,1.6%-4.0% and 0.3%-0.5%,respectively than single cropped soybean,while the differences were all not significant.”

✓ located verbatim in the source · abstract, characters 905–1129 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Increasing maize large row spacing increased maize chlorophyll content.

Taxon
maizeZea mayse0
Treatment
increasing of large row spacing of maizee0
Outcome
chlorophyll contente0
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

“with the increasing of large row spacing of maize,the chlorophyll content and leaf area index of maize increased,the photosynthetic rate of maize increased at first and decreased later,it was the highest in the intercropping system of 2∶ 3,and the photosynthetic rate,chlorophyll content and leaf area index of soybean increased,while the differences in the photosynthetic characteristics indexes among three intercropping modes were all not significant.”

✓ located verbatim in the source · abstract, characters 1171–1625 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Increasing maize large row spacing increased maize leaf area index.

Taxon
maizeZea mayse0
Treatment
increasing of large row spacing of maizee0
Outcome
leaf area indexe0
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

“with the increasing of large row spacing of maize,the chlorophyll content and leaf area index of maize increased,the photosynthetic rate of maize increased at first and decreased later,it was the highest in the intercropping system of 2∶ 3,and the photosynthetic rate,chlorophyll content and leaf area index of soybean increased,while the differences in the photosynthetic characteristics indexes among three intercropping modes were all not significant.”

✓ located verbatim in the source · abstract, characters 1171–1625 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Maize photosynthetic rate first rose then fell as large row spacing increased, peaking at 2∶ 3.

Taxon
maizeZea mayse0
Treatment
increasing of large row spacing of maizee0
Outcome
photosynthetic ratee0
Direction
increased at first and decreased latere0
Value
2∶ 3e0

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

“with the increasing of large row spacing of maize,the chlorophyll content and leaf area index of maize increased,the photosynthetic rate of maize increased at first and decreased later,it was the highest in the intercropping system of 2∶ 3,and the photosynthetic rate,chlorophyll content and leaf area index of soybean increased,while the differences in the photosynthetic characteristics indexes among three intercropping modes were all not significant.”

✓ located verbatim in the source · abstract, characters 1171–1625 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Soybean photosynthetic rate increased with wider maize rows, without a significant difference among modes.

Taxon
soybeanGlycine maxe0
Treatment
increasing of large row spacing of maizee0
Outcome
photosynthetic ratee0
Direction
increasede0

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“with the increasing of large row spacing of maize,the chlorophyll content and leaf area index of maize increased,the photosynthetic rate of maize increased at first and decreased later,it was the highest in the intercropping system of 2∶ 3,and the photosynthetic rate,chlorophyll content and leaf area index of soybean increased,while the differences in the photosynthetic characteristics indexes among three intercropping modes were all not significant.”

✓ located verbatim in the source · abstract, characters 1171–1625 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Soybean chlorophyll content increased with wider maize rows, without a significant difference among modes.

Taxon
soybeanGlycine maxe0
Treatment
increasing of large row spacing of maizee0
Outcome
chlorophyll contente0
Direction
increasede0

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“with the increasing of large row spacing of maize,the chlorophyll content and leaf area index of maize increased,the photosynthetic rate of maize increased at first and decreased later,it was the highest in the intercropping system of 2∶ 3,and the photosynthetic rate,chlorophyll content and leaf area index of soybean increased,while the differences in the photosynthetic characteristics indexes among three intercropping modes were all not significant.”

✓ located verbatim in the source · abstract, characters 1171–1625 · show in text ↑
Intervention effectobservedoriginal resultpositivenot significant (as stated)measured

Claim · model-written summary

Soybean leaf area index increased with wider maize rows, without a significant difference among modes.

Taxon
soybeanGlycine maxe0
Treatment
increasing of large row spacing of maizee0
Outcome
leaf area indexe0
Direction
increasede0

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“with the increasing of large row spacing of maize,the chlorophyll content and leaf area index of maize increased,the photosynthetic rate of maize increased at first and decreased later,it was the highest in the intercropping system of 2∶ 3,and the photosynthetic rate,chlorophyll content and leaf area index of soybean increased,while the differences in the photosynthetic characteristics indexes among three intercropping modes were all not significant.”

✓ located verbatim in the source · abstract, characters 1171–1625 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The 2∶ 3 intercropping system had the highest light energy utilization rate.

Taxon
maizeZea mayse0
Treatment
intercropping system of 2∶ 3e0
Outcome
light energy utilization ratee0
Direction
higheste0

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

“The light energy utilization rate of maize and soybean intercropping system of 2∶ 3 was the highest.”

✓ located verbatim in the source · abstract, characters 1625–1725 · show in text ↑

Zea mays · physiology: photosynthesis · Glycine max (soybean)Positive and negative results

5 papers: 3 positive, 2 negative or no effect

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

  1. negative
  2. no effect
  3. positive

1 paper more in this group

See all 5 papers →

Zea mays · growth · Glycine max (soybean)Positive and negative results

19 papers: 16 positive, 3 negative or no effect

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

  1. negative
  2. negative
  3. no effect

15 papers more in this group

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intercropping · physiology: pigments · Glycine max (soybean)Results differ

10 papers: 6 positive, 4 negative or no effect

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

  1. positive
  2. positive
  3. positive

6 papers more in this group

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intercropping · physiology: pigments · Zea mays (maize)Results differ

23 papers: 17 positive, 6 negative or no effect

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

  1. no effect
  2. no effect
  3. negative

19 papers more in this group

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intercropping · physiology: photosynthesis · Glycine max (soybean)Results differ

25 papers: 8 positive, 17 negative or no effect

16 papers in the same direction as this paper · 8 in the opposite direction

  1. positive
  2. positive
  3. positive

21 papers more in this group

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intercropping · growth · Glycine max (soybean)Results differ

66 papers: 38 positive, 28 negative or no effect

27 papers in the same direction as this paper · 38 in the opposite direction

  1. positive
  2. positive
  3. positive

62 papers more in this group

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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

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density · physiology: pigments · Glycine max (soybean)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. no effect
  2. positive
  3. positive
See all 4 papers →

8 of 14 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.