Evaluation of yield stability of cowpea under sole and intercrop management in Nigeria

Blade, S. F.; Mather, D. E.; Singh, B. B.; Smith, Donald L.

doi:10.1007/bf00039658

Cited by 16 publications

(11 citation statements)

References 10 publications

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“…Although several studies on cowpea/maize intercropping undertaken elsewhere have been reported with varied intercrop advantages (Blade et al, 1992;Ezumah and Ikorgu, 1992;Singh and Ajeigbe, 2007;Katsaruware and Manyanhaire, 2009), emphasis on the use of short duration cowpea varieties has been negligible. In Southern Guinea Savanna region of Nigeria, there is dearth of documented information on cowpea/maize intercropping involving extra-early-and earlymaturing varieties of cowpea.…”

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confidence: 99%

Evaluation of some extra-early- and early-maturing cowpea varieties for intercropping with maize in southern Guinea Savanna of Nigeria

Egbe¹,

Alibo²,

Nwueze³

2010

ABJNA

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Two field experiments were undertaken between 2008 and 2009 at the Teaching and Research Farm of the University of Agriculture,Makurdi and at the National Root Crops Research Institute Sub-Station, Otobi (both located in Southern Guinea Savanna agro ecological zone of Nigeria) to evaluate fourteen improved extra-early-and early-maturing cowpea varieties in sole and in intercropping systems. The work aimed at assessing the productivity of these cowpea varieties and competitive interactions with the maize component as well as the profitability of cowpea/maize intercropping systems. The first experiment was laid out in randomized complete block design with three replications in each of the two locations. IT04K-221-1, IT03K-316-1,IT03K-324-9,IT03K-351-1,IT00K-1217, IT98K-692, IT99K-377-1, IT03K-378-4 cowpea varieties proved superior to the Ife Brown(check) in number of pods produced per plant, dry pod weight and grain yield, and therefore were selected for further investigation under intercropping .Grain yield advantage of IT04K-221-1 over Ife Brown was370.69%.The selected cowpea varieties, along with the Ife Brown(check), were intercropped with maize in split-plot experiment laid out in randomized complete block design with three replications at Otobi for two seasons.. Intercropping depressed the number of branches per plant and the dry grain yield of cowpea but did not influence the number of pods per plant, number of seeds per pod and the pod length of cowpea. Maize grain yield reductions resulting from intercropping varied from 49.26% to 72.41%, depending on the cowpea variety. Intercrop advantages measured by land equivalent ratio, area x time equivalency ratio; land equivalent coefficient indicated that IT04K-221-1, IT03K-316-1, IT03K-324-9, IT98K-692 and IT00K-2117 proved most productive under intercropping. Competitive indices (competitive ratio and aggressivity) showed that cowpea was the more competitive component of the intercropping. Sole cowpea had a mean net benefit of-N560.00/ha, while intercropped cowpea gave a mean value of N 11330.00/ha, implying that growing extraearly-and early-maturing cowpea in sole systems would result in losses. Intercropped IT04K-221-1 produced the largest net benefit (N 42425.00/ha), while IT03K-378-4 gave the lowest (-N 16300.00/ha).

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confidence: 99%

Evaluation of some extra-early- and early-maturing cowpea varieties for intercropping with maize in southern Guinea Savanna of Nigeria

Egbe¹,

Alibo²,

Nwueze³

2010

ABJNA

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“…Stability of mixtures may be due to the positive effects of compensation, like production of more pods or heavier grains by a vigorous plant neighbouring a nonvigorous plant or reduced interaction with the environment [8][9][10]. Among nine cowpea breeding lines grown in 13 environments in Nigeria under different management regimes, Blade et al [15] noted that the stability of a given line was influenced more by the predictable effects of the treatments like cropping system and insecticide application than by the unpredictable variation among the environments.…”

Section: Discussionmentioning

confidence: 99%

“…Grain yields of two of four cowpea mixtures tested were more stable than those of their pure lines [14]. Blade et al [15] observe that the more stable cowpea lines tended to be low-yielding in both low-and high-yielding environments while the least stable lines out-yielded other lines in all except the poor environments.…”

Section: Introductionmentioning

confidence: 94%

Potential of Cowpea Variety Mixtures to Increase Yield Stability in Subsistence Agriculture: Preliminary Results

Okonya

Maass

2014

International Journal of Agronomy

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CowpeaVigna unguiculata(L.) Walp. is an important leafy vegetable and grain legume in Uganda. Unlike in commercial agriculture, where variety mixtures are known to give higher and more stable yields, the performance of cowpea variety mixtures in subsistence agriculture is little known. Mixtures containing up to four cowpea varieties were subjected to all possible 2-way, 3-way, and 4-way combinations. These cowpea varieties and mixtures were grown at three locations in Soroti and Kumi districts in order to assess the relative mixture effect, defined as: Mixture effect (%) = (mixture yield − pure line component average)/pure line component average × 100. Yield data was subjected to one-way ANOVA using the GLM procedure of SYSTAT. PLABSTAT was used to generate ecovalence (Wi) values as a measure of stability with low ecovalence values indicating higher stability. The total cowpea dry matter (DM) yield was in the range of 3.7–6.7 g/m2(leaf) and 12.1–36.7 g/m2(grain), respectively. Mixture effects were between −9.3–14.0% (leaf) and −30.3–21.9% (grain). Yield stability spanned Wi= 0.06–5.30 (leaf) andWi= 4.45–894.84 (grain). The results suggested that yields of cowpea variety mixtures grown in marginal environments were more stable than of single varieties but not all mixtures yielded more than single varieties.

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“…The production of more leaves under monocropping and rotational cowpea means higher light interception and more photo-assimilate production (Babaji et al, 2011;Kouyate et al, 2012). Blade et al (1992) reported that cowpea growth was severely depressed by competition with other plants. The higher number of nodules per plant on cowpea planted at Taung may have been attributed to sandy soil on that site.…”

Section: Discussionmentioning

confidence: 99%

Influence of Management Practices on Selected Cowpea Growth Attributes and Soil Organic Carbon

Sebetha

Modi²

2016

JAS

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Cowpea is a multi-purpose nitrogen fixing crop that can be grown as a vegetable, grain legume and a fodder. The objectives of this study were to investigate the growth response of cowpea to different cropping systems at different locations and determine nitrogen fertilization on cowpea growth and soil organic carbon content. Three cropping systems were used, namely, maize-cowpea rotation, cowpea monocropping and maize-cowpea intercropping at three locations (Potchefstroom, Taung, and Rustenburg) in South Africa during 2011/12 and 2012/13 planting seasons. Nitrogen fertilizer was applied at two rates where no application was the control at all locations and application according to soil analysis recommendation for maize requirement was applied at each location. The variables measured for cowpea growth were days to 100% flowering and physiological maturity, number of leaves and nodules per cowpea plant. Soil organic carbon was determined for each treatment. The results showed that, maize-cowpea rotation and monocropping reached days to 100% flowering and maturity significantly earlier compared to intercropping. Cowpea planted at Potchefstroom and Rustenburg reached days to 100% flowering and physiological maturity significantly earlier than cowpea planted at Taung. Cowpea planted at Taung had significantly higher number of nodules per plant than cowpea planted at Potchefstroom and Rustenburg. There was also a positive correlation between soil organic carbon and cowpea growth. It is concluded that the positive effect of cowpea in agronomic systems is enhanced by the correct cropping system, although it is affected by location.

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Evaluation of yield stability of cowpea under sole and intercrop management in Nigeria

Cited by 16 publications

References 10 publications

Evaluation of some extra-early- and early-maturing cowpea varieties for intercropping with maize in southern Guinea Savanna of Nigeria

Evaluation of some extra-early- and early-maturing cowpea varieties for intercropping with maize in southern Guinea Savanna of Nigeria

Potential of Cowpea Variety Mixtures to Increase Yield Stability in Subsistence Agriculture: Preliminary Results

Influence of Management Practices on Selected Cowpea Growth Attributes and Soil Organic Carbon

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