Abstract
A 2-year field study was conducted to compare the productivity of intercropped and monoculture maize and cowpea as influenced by the height of maize in the intercrop. During the 1994 and 1995 cropping seasons, IT 84E-124, a semi-erect, early-maturing, and photoperiod-insensitive cowpea cultivar, was planted with “Afo”, a short (1.2 m), early maturing, less vegetative, and AMRSR-Y, a tall (1.5 m), improved open-pollinated and of medium maturity group maize cultivars in a row intercropping. Yield components and grain yield of maize and cowpea were lower under intercropping than in monoculture systems. Intercropped cowpea yields were decreased by 29 and 26 per cent, respectively, under the short and tall maize varieties, while the yields of intercropped maize were reduced by 11 and 33 per cent for the short and tall varieties, respectively, across the two seasons. Land equivalent ration (LER) was, however, greater with the shorter maize variety than with the taller variety (1.60 vs 1.41), and was greater with the intercrops than with the monocultures (1.51 vs 1.00) across the two seasons. The results of this study indicate that although intercropping may result in decreases in the yield of one or both of the component crops in a maize-cowpea mixture, the productivity of a unit land area is higher with intercropping than with monoculture. The higher LER with the shorter maize variety in this study suggests that intercropping may be more remunerative when short and less vegetative cereal varieties are used in mixtures with legume crops. Influence de la taille de variété de maïs sur la productivité de maïs (Zea mays L.) semé en lignes alternantes de dolique (Vigna unguiculata (L.) Walp) Résumé Une étude de 2 années sur le champ s'est déroulée pour comparer la productivité de deux cultures et monoculture de maïs et dolique comme influencée par la taille de maïs semé en lignes alternantes de l'autre culture. Pendant les saisons des semailles de 1994 et 1995 IT 84E-124, une variété de dolique, de semi-debout, de maturation tôt et de photopériode insensitive était semé avec "Afo" une variété courte (1.2 m) de maïs, de maturation tôt et moins végétatif et avec DMRSR-Y une variété haute (1.5 m) de maïs amélioré de pollinisation libre et de groupe de maturation moyenne, en lignes alternantes. Les composants de rendement et le rendement de grain de maïs et de dolique tous deux étaient plus basses sous les semailles en lignes alternantes que dans les systèmes de monoculture. Les rendements de dolique semé entre les lignes d'une autre culture diminuaient par 29 et 26 pour cent respectivement sous la variété courte et haute de maïs, alors que les rendements de maïs semé entre les lignes d'une autre culture réduisaient par 11 et 33 pour cent respectivement pour les variétés courtes et hautes au cours des deux saisons. La proportion de l'iquivalent de terre (PET) était, cependant, plus grande avec la variété courte de maïs qu' avec la variété haute (1.60 vs 1.41) et plus grande avec les deux cultures en lignes alternantes qu' avec les monocultures (1.51 vs 1.00) au cours des deux saisons. Les résultats de cette étude indiquent que malgré le fait que les semailles en lignes alternantes puissent mener aux diminutions en rendement de l'une ou de toutes deux cultures composantes dans le mélange de maïs-dolique, la productivité d'une unité de superficie de terre est plus élevée avec les deux cultures alternantes qu' avec les monocultures. PET plus élevée avec la variété plus courte de maïs comme obtenue dans l'étude en question suggérait que les semailles en lignes alternantes pourraient être plus rémunératrices lorsque les variétés de céréale moins végétatives et courtes sont utilisées dans les mélanges avec les cultures légumineuses. Ghana Jnl agric. Sci. Vol.33(2) 2000: 199-206
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Claims 9
Claim · model-written summary
Intercropped cowpea yields were decreased by 29 per cent under the short maize variety.
- Taxon
- cowpea
Vigna unguiculatae1 - Treatment
- Intercroppede1
- Outcome
- cowpea yieldse1
- Direction
- decreasede1
- Value
- 29e1
- Qualifier
- shorte1
- Comparator
- monoculture systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monoculture systems”
e1“Intercropped cowpea yields were decreased by 29 and 26 per cent, respectively, under the short and tall maize varieties”
Claim · model-written summary
Intercropped cowpea yields were decreased by 26 per cent under the tall maize variety.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- Intercroppede1
- Outcome
- cowpea yieldse1
- Direction
- decreasede1
- Value
- 26e1
- Qualifier
- talle1
- Comparator
- monoculture systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monoculture systems”
e1“Intercropped cowpea yields were decreased by 29 and 26 per cent, respectively, under the short and tall maize varieties”
Claim · model-written summary
Intercropped maize yields were reduced by 11 per cent with the short variety.
- Treatment
- intercroppede2
- Outcome
- yields of intercropped maizee2
- Direction
- reducede2
- Value
- 11e2
- Qualifier
- shorte2
- Comparator
- monoculture systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monoculture systems”
e2“while the yields of intercropped maize were reduced by 11 and 33 per cent for the short and tall varieties, respectively, across the two seasons”
Claim · model-written summary
Intercropped maize yields were reduced by 33 per cent with the tall variety.
- Treatment
- intercroppede2
- Outcome
- yields of intercropped maizee2
- Direction
- reducede2
- Value
- 33e2
- Qualifier
- talle2
- Comparator
- monoculture systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“monoculture systems”
e2“while the yields of intercropped maize were reduced by 11 and 33 per cent for the short and tall varieties, respectively, across the two seasons”
Claim · model-written summary
Land equivalent ratio was higher with the shorter maize variety than with the taller variety (1.60 vs 1.41).
- Treatment
- shorter maize varietye3
- Outcome
- LERe3
- Direction
- greatere3
- Value
- 1.60 vs 1.41e3
- Comparator
- taller varietye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Land equivalent ration (LER) was, however, greater with the shorter maize variety than with the taller variety (1.60 vs 1.41)”
Claim · model-written summary
Land equivalent ratio was higher for intercrops than for monocultures (1.51 vs 1.00).
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Land equivalent ration (LER) was, however, greater with the shorter maize variety than with the taller variety (1.60 vs 1.41)”
e4“and was greater with the intercrops than with the monocultures (1.51 vs 1.00) across the two seasons”
Claim · model-written summary
Productivity per unit land area was higher with intercropping than with monoculture.
- Taxon
- maize and cowpeaVigna unguiculata
Zea mayse0 - Treatment
- intercroppinge5
- Outcome
- productivity of a unit land areae5
- Direction
- highere5
- Comparator
- monoculturee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield components and grain yield of maize and cowpea”
e5“the productivity of a unit land area is higher with intercropping than with monoculture”
Claim · model-written summary
Yield components and grain yield of maize and cowpea were lower under intercropping than under monoculture.
- Taxon
- maize and cowpeaVigna unguiculataZea mayse0
- Treatment
- intercroppinge0
- Outcome
- Yield components and grain yielde0
- Direction
- lowere0
- Comparator
- monoculture systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield components and grain yield of maize and cowpea were lower under intercropping than in monoculture systems”
Claim · model-written summary
Intercropping may be more remunerative when short, less vegetative cereal varieties are used with legume crops.
Verbatim
e6“intercropping may be more remunerative when short and less vegetative cereal varieties are used in mixtures with legume crops”
The same questions in other papers
intercropping · yield · Vigna unguiculata (cowpea)Results differ
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- negative
- negative
- no effect
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See all 103 papers →intercropping · yield · Zea mays (maize)Positive and negative results
612 papers in the same direction as this paper · 181 in the opposite direction · 40 reporting no difference from an alternative
- negative
- positive
- no effect
830 papers more in this group
See all 834 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.