Abstract
Intercropping studies usually focus on yield advantage and interspecific interactions but few quantify temporal niche differentiation and its relationship with intercropping yield advantage. A field experiment conducted in northwest China in 2013 and 2014 examined four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato) and the corresponding monocultures. Total dry matter data collected every 20 d after maize emergence were fitted to logistic models to investigate the temporal dynamics of crop growth and interspecific interactions. All four intercropping systems showed significant yield advantages. Temporal niche complementarity between intercropped species was due to differences in sowing and harvesting dates or the time taken to reach maximum daily growth rate or both. Interspecific interactions between intercropped species amplified temporal niche differentiation as indicated by postponement of the time taken to reach maximum daily growth rate of late-maturing crops (i.e. 21 to 41 days in maize associated with oilseed rape or potato). Growth trajectories of intercropped maize or soybean recovered after the oilseed rape harvest to the same values as in their monoculture on a per plant basis. Amplified niche differentiation between crop species depends on the identity of neighboring species whose relative growth rate is crucial in determining the differentiation.
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Claims 11
Claim · model-written summary
oilseed rape/maize intercropping showed significant yield advantage.
- Taxon
- oilseed rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Treatment
- intercropping systemse0
- Outcome
- yield advantagese0
- Direction
- advantagese0
- Qualifier
- oilseed rape/maizee0
- Comparator
- corresponding monoculturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato) and the corresponding monocultures. Total dry matter data collected every 20 d after maize emergence were fitted to logistic models to investigate the temporal dynamics of crop growth and interspecific interactions. All four intercropping systems showed significant yield advantages”
Claim · model-written summary
oilseed rape/soybean intercropping showed significant yield advantage.
- Taxon
- oilseed rapeBrassica napuse0
- Treatment
- intercropping systemse0
- Outcome
- yield advantagese0
- Direction
- advantagese0
- Qualifier
- oilseed rape/soybeane0
- Comparator
- corresponding monoculturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato) and the corresponding monocultures. Total dry matter data collected every 20 d after maize emergence were fitted to logistic models to investigate the temporal dynamics of crop growth and interspecific interactions. All four intercropping systems showed significant yield advantages”
Claim · model-written summary
potato/maize intercropping showed significant yield advantage.
- Taxon
- potato
Solanum tuberosume0 - Treatment
- intercropping systemse0
- Outcome
- yield advantagese0
- Direction
- advantagese0
- Qualifier
- potato/maizee0
- Comparator
- corresponding monoculturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato) and the corresponding monocultures. Total dry matter data collected every 20 d after maize emergence were fitted to logistic models to investigate the temporal dynamics of crop growth and interspecific interactions. All four intercropping systems showed significant yield advantages”
Claim · model-written summary
soybean/potato intercropping showed significant yield advantage.
- Taxon
- soybean
Glycine maxe0 - Treatment
- intercropping systemse0
- Outcome
- yield advantagese0
- Direction
- advantagese0
- Qualifier
- soybean/potatoe0
- Comparator
- corresponding monoculturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato) and the corresponding monocultures. Total dry matter data collected every 20 d after maize emergence were fitted to logistic models to investigate the temporal dynamics of crop growth and interspecific interactions. All four intercropping systems showed significant yield advantages”
Claim · model-written summary
Temporal niche complementarity was attributed to sowing or harvesting date differences or timing of maximum growth rate.
- Taxon
- oilseed rapeBrassica napuse1
- Outcome
- Temporal niche complementaritye0
- Qualifier
- differences in sowing and harvesting dates or the time taken to reach maximum daily growth rate or bothe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temporal niche complementarity between intercropped species was due to differences in sowing and harvesting dates or the time taken to reach maximum daily growth rate or both”
e1“four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato)”
Claim · model-written summary
Interspecific interactions amplified temporal niche differentiation and postponed maximum growth rate in late maturing crops.
- Taxon
- oilseed rapeBrassica napuse1
- Treatment
- Interspecific interactionse0
- Outcome
- temporal niche differentiatione0
- Direction
- amplifiede0
- Qualifier
- postponement of the time taken to reach maximum daily growth rate of late-maturing cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interspecific interactions between intercropped species amplified temporal niche differentiation as indicated by postponement of the time taken to reach maximum daily growth rate of late-maturing crops”
e1“four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato)”
Claim · model-written summary
Maximum daily growth rate timing in maize associated with oilseed rape was postponed by 21 to 41 days.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“postponement of the time taken to reach maximum daily growth rate of late-maturing crops (i.e. 21 to 41 days in maize associated with oilseed rape or potato)”
Claim · model-written summary
Maximum daily growth rate timing in maize associated with potato was postponed by 21 to 41 days.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“postponement of the time taken to reach maximum daily growth rate of late-maturing crops (i.e. 21 to 41 days in maize associated with oilseed rape or potato)”
Claim · model-written summary
After oilseed rape harvest, intercropped maize growth trajectories recovered to monoculture values per plant.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth trajectories of intercropped maize or soybean recovered after the oilseed rape harvest to the same values as in their monoculture on a per plant basis”
Claim · model-written summary
After oilseed rape harvest, intercropped soybean growth trajectories recovered to monoculture values per plant.
- Taxon
- soybeanGlycine maxe0
- Outcome
- Growth trajectoriese0
- Direction
- recoverede0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth trajectories of intercropped maize or soybean recovered after the oilseed rape harvest to the same values as in their monoculture on a per plant basis”
Claim · model-written summary
Amplified niche differentiation depended on neighboring species identity and its relative growth rate.
- Taxon
- oilseed rapeBrassica napuse1
- Outcome
- niche differentiatione0
- Qualifier
- identity of neighboring speciese0
Not reportedTreatmentDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amplified niche differentiation between crop species depends on the identity of neighboring species whose relative growth rate is crucial in determining the differentiation”
e1“four intercropping systems (oilseed rape/maize, oilseed rape/soybean, potato/maize, and soybean/potato)”
The same questions in other papers
intercropping · yield · Brassica napus (oilseed rape)Results differ
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- no effect
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See all 30 papers →intercropping · yield · Solanum tuberosum (potato)Positive and negative results
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See all 54 papers →intercropping · yield · Glycine max (soybean)Positive and negative results
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See all 218 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.