Allelopathic Effects of Some Selected Tree Species on the Germination and Growth of Cowpea (Vigna unguiculata L. Walp.)


The allelopathic effect of three tree species (Azardiracta indica, Vitellaria paradoxa, and Parkia bi-globosa) on germination and growth of cowpea was investigated in the Southern Guinea Savannah agro ecological zone of Nigeria. The experiment was laid out in Randomized Complete Block Design (RCBD) with three (3) replicates. Data were collected on germination, plant height, stem diameter, number of leaves, number of branches, root length, the above grand biomass and the below grand biomass and were subjected to statistical analysis using Analysis of Variance (ANOVA) while the significant mean was separated using Duncan’s Multiple Range Test (DMRT) at 5% possibility level. Results showed that the tree species brought about considerable inhibition in the germination of cowpea seeds and in its growth parameters. The statistical germination value of the cowpea seeds under the tree species had decreased value thus indicating that growth inhibitions were seriously felt. It was apparent that Parkia biglobosa (53.33) and Vitellaria paradoxa (60.00) had more inhibitory effect on cowpea seeds germinability than that of Azardiracta indica. (63.33) while all the treatments are lower than that of control (100). The tree species had similar inhibition capability in the cowpea plant height, stem circumference, number of leaves, above grand biomass and below grand biomass. However, in all treatment, statistic showed that there is no significant difference (p < 0.05) among the means.

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Aleem, M. , Alamu, L. and Olabode, O. (2014) Allelopathic Effects of Some Selected Tree Species on the Germination and Growth of Cowpea (Vigna unguiculata L. Walp.). Open Journal of Forestry, 4, 310-315. doi: 10.4236/ojf.2014.44037.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Ashrafi, Z., Mashhadi, H. R., & Sadeghi, S. (2007). Allelopathic Effects of Barley (Hordeum vulgare) on Germination and Growth of Wild Varley (Hordeum spontaneum). Pakistan Journal of Weed Science Research, 13, 99-112.
[2] Ashrafi, Z., Mashhadi, H. R., Sadeghi, S., & Alizade, H. M. (2008). Effects Allelopathical of Sunflower (Helianthus annuus) on Germination and Growth of Wild Varley (Hordeum spontaneum). Journal of Agricultural Technology, 4, 219-229.
[3] Boffa, J. M. (1999). Agroforestry Parkland Systems in Sub-Saharan Africa: FAO Conservation Guide 34. Rome: Food and Agriculture Organization of the United Nations.
[4] Bokhari, M. H., & Aslam, K. M. (1985). Neem (Melia Azadirachta A. Juss). A Useful Tree in Northern Nigeria. Annals of Borno, II, 83-86.
[5] Booth, F. E. M., & Wickens, G. E. (1988). Non-Timber Uses of Selected Arid Zone Trees and Shrubs in Africa. FAO Conservation Guide 19. Rome: Food and Agriculture Organization of the United Nations, 103-109.
[6] Davis, D. W., Oelke, E. A., Oplinger, E. S., Doll, J. D., Hanson, C. V., & Putnam, D. H. (1991). Cowpea. Alternative Field Crops Manual. University of Wisconsin-Extension, Cooperative Extension University of Minnesota: Center for Alternative Plant and Animal Products and the Minnesota Extension Service.
[7] Einhelling, F. A. (1996). Interactions Involving Allelopathy in Cropping Systems. Agronomy Journal, 88, 886-893.
[8] Gross, D., & Paritheir, B. (1994). Novel Natural Substances Acting in Plant Growth Regulation. Journal of Plant Growth Regulation, 13, 93-114.
[9] Hall, J., Aebischer, D., Tomlinson, H., Osei-Amaning, E., & Hindle, J. (1996). Vitellaria Paradoxa: A Monograph. School of Agriculture and Forest Sciences Publication Number 8. Bangor, Wales: University of Wales.
[10] Hopkins, H. C. (1983). The Taxonomy, Reproductive Biology and Economic Potential of Parkia (Leguminosae: Mimosoideae) in Africa and Madagascar. Botanical Journal of the Linnean Society, 87, 135-137.
[11] Inderjit, I. (1996). Plant Phenolies in Allelopathy. Botanical Review, 62, 186-202.
[12] Inderjit, N., & Dakshini, K. M. (1992). Formation 7-O Glucoside (Ononin), an Additional Growth Inhibitor in Soils Associated with the Weed, Pluchea Lanceolata (DC). Clarke (Asteraceae). Journal of Chemical Ecology, 18, 713-718.
[13] Kohli, R. K., Batish, D., & Singh, H. P. (1998). Allelopathy and Its Implications in Agroecosystems. Journal of Crop Production, 1, 169-202.
[14] Maranz, S., Wiesman, Z., Bisgaard, J., & Bianchi, G. (2004). Germplasm Resources of Vitellariaparadoxa Based on Variations in Fat Composition across the Species Distribution Range. Agroforestry Systems (in Cooperation with ICRAF), 60, 71.
[15] Mertz, O., Lykke, A. M., & Reenberg, A. (2001). Importance and Seasonality of Vegetable Consumption and Marketing in Burkina Faso. Economic Botany, 55, 276-289.
[16] Olaniyi, J. O. (2006). Influence of Nitrogen and Phosphorus Fertilizer on Seed Yield and Quality of Egusi Melon (Citrullus lanatus (Thunb) Mansf.) in Ogbomoso, Sourthwestern Nigiera. PhD Thesis, Ibadan: University of Ibadan, 199.
[17] Putnam, A. R. (1985). Weed Allelopathy. In Duke, S. O. (Ed.), Weed Physiology. Reproduction and Ecophysiology (Volume 1, pp. 131-155). CRC Press.
[18] Rice, L. E. (1984). Allelopathy. New York, London: Academic Press, 309-316.
[19] Seligler, D. S. (1996). Chemistry and Mechanism of Allelopathic Interactions. Agronomy Journal, 88, 876-885.
[20] Shaukat, S. S., & Siddiqui, I. A. (2001). Lantana Camara in the Soil Changes the Fungal Community Structure and Reduces Impact of Meloidogyne Javanica on Mungbean. Phytopathology Mediterranean, 40, 245-252.
[21] Singh, B. B., Chambliss, O. L., & Sharma, B. (1997). Recent Advances in Cowpea Breeding. 30-49 in Advances in Cowpea Research.
[22] Von Maydell, H. (1990). Butyrospermum parkii (G. Don) Kotschy 202-207. Trees and Shrubs of the Sahel: Their Characteristics and Uses. English Text Revised J. Brase. Eschborn: Deutsche Gesellschaft fur Technische Zusammenarbeit (GTZ).
[23] Von Maydell, H. J. (1986). Trees and Shrubs of the Sahel, Their Characteristics and Uses. Eschborn.

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