Abstract
Cowpea [ Vigna unguiculata (L.) Walp.] is a vital component of traditional cropping systems in the subtropics and tropics, grown both for high‐protein grain and nutritious fresh leaves. The objectives of this study were to determine the effects of (i) cropping regime and (ii) leaf harvesting initiation time and frequency on yield and yield components of dual‐purpose cowpea. Studies were conducted at the Kenya National Dry land Research Center–Katumani over four seasons. Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize. Leaf harvesting was initiated at 2, 3, or 4 wk after emergence (WAE) and thereafter done at 7‐ or 14‐d intervals. Control plants remained intact with no leaf harvesting. The number of lateral stems per plant, pods per plant, seeds per pod, unit seed weight, and vegetable and grain yields were monitored throughout each season, and plant productivity was found to be lower in intercropped than in monocropped cowpea. Leaf harvesting reduced all yield components. Initiating leaf harvesting at 3 and 4 WAE resulted in the highest leaf and grain yields, respectively. Harvesting leaves at a 7‐d interval was associated with higher leaf yield, while a 14‐d interval led to higher grain yield. Overall, yields were highest under treatments with no leaf harvest and lowest when leaf harvesting was initiated 2 WAE. Results of this study can help dual‐purpose cowpea growers optimize yields according to their production goals.
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Claims 7
Claim · model-written summary
Cowpea intercropped with maize had lower plant productivity than monocropped cowpea.
- Taxon
- cowpea
Vigna unguiculatae1 - Material
- K80e2
- Treatment
- intercropped with maizee2
- Outcome
- plant productivitye1
- Direction
- lowere1
- Comparator
- monocropped cowpeae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“plant productivity was found to be lower in intercropped than in monocropped cowpea”
e2“Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize”
Claim · model-written summary
Leaf harvesting reduced all yield components of cowpea.
- Taxon
- CowpeaVigna unguiculatae2
- Material
- K80e2
- Treatment
- Leaf harvestinge3
- Outcome
- yield componentse3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize”
e3“Leaf harvesting reduced all yield components”
Claim · model-written summary
Initiating leaf harvesting at 3 and 4 WAE gave the highest leaf and grain yields, respectively.
- Taxon
- CowpeaVigna unguiculatae2
- Material
- K80e2
- Treatment
- Initiating leaf harvesting at 3 and 4 WAEe4
- Outcome
- highest leaf and grain yieldse4
- Direction
- higheste4
- Qualifier
- respectivelye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize”
e4“Initiating leaf harvesting at 3 and 4 WAE resulted in the highest leaf and grain yields, respectively”
Claim · model-written summary
Harvesting leaves at a 7‐d interval was associated with higher leaf yield.
- Taxon
- CowpeaVigna unguiculatae2
- Material
- K80e2
- Treatment
- 7‐d intervale5
- Outcome
- leaf yielde5
- Direction
- highere5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize”
e5“Harvesting leaves at a 7‐d interval was associated with higher leaf yield”
Claim · model-written summary
A 14‐d harvesting interval was associated with higher grain yield.
- Taxon
- CowpeaVigna unguiculatae2
- Material
- K80e2
- Treatment
- 14‐d intervale6
- Outcome
- grain yielde6
- Direction
- highere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize”
e6“while a 14‐d interval led to higher grain yield”
Claim · model-written summary
Yields were highest under treatments with no leaf harvest.
- Taxon
- CowpeaVigna unguiculatae2
- Material
- K80e2
- Treatment
- no leaf harveste7
- Outcome
- yieldse7
- Direction
- higheste7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize”
e7“Overall, yields were highest under treatments with no leaf harvest and lowest when leaf harvesting was initiated 2 WAE”
Claim · model-written summary
Yields were lowest when leaf harvesting was initiated at 2 WAE.
- Taxon
- CowpeaVigna unguiculatae2
- Material
- K80e2
- Treatment
- leaf harvesting was initiated 2 WAEe7
- Outcome
- yieldse7
- Direction
- loweste7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Cowpea cultivar ‘K80’ was grown as a monocrop or intercropped with maize”
e7“Overall, yields were highest under treatments with no leaf harvest and lowest when leaf harvesting was initiated 2 WAE”
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