Advertisement

Agroforestry Systems

, Volume 54, Issue 2, pp 161–170 | Cite as

Weed seedbank characteristics of arable fields under different fallow management systems in the humid tropical zone of southeastern Nigeria

  • I. Okezie Akobundu
  • F. Ekeleme
Article

Abstract

The composition and pattern of weed flora in arable fields are determined by their seedbank structure; but the influence of fallow management practices on weed seedbank structure is presently unknown. The objective of this study was to investigate weed seedbank characteristics and weed population dynamics in arable fields in natural and planted-fallow systems. The study plots were at Mbaise, a densely populated area of southeastern Nigeria, where farmers regenerate their exhausted soils by maintaining planted fallows of Dactyladenia barteri (Hook. F. ex Oliv.) Prance & F. White, and at Umuahia, a less-densely populated area in the same region, where farmers depend on natural bush fallow for soil regeneration. The effect of three years of fallow on the weed flora of arable fields in the two fallow management systems differed remarkably. The first flush of weeds on fields that were cultivated after three years of planted D. barteri fallow (Mbaise) consisted of 80% broadleaf weeds, 7% grass weeds and 13% sedges. On the other hand, the first flush of weeds on the natural bush fallow fields (Umuahia) of the same fallow duration as the D. barteri fallow system consisted of 17% broadleaf weeds, 70% grasses and 13% sedges. Three years of planted fallow caused 36% decrease in weed seedbank at Mbaise relative to the cropped field while the same duration of natural bush fallow caused a 31% increase in weed seedbank at Umuahia. These results show that the planted D. barteri fallow system has a higher potential to reduce weed pressure in smallholder agriculture than the natural bush fallow system and may explain in part why farmers in this humid forest zone have adopted the practice.

Acioa barteri bush fallow Dactyladenia barteri humid tropics planted fallow 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Afolayan AA (1983) Population. In: Ogumtoyinbo JS, Areola OO and Filani M (eds) A Geography of Nigerian Development, pp 147-157. Heineman Educational Books, Nigeria Ltd, IbadanGoogle Scholar
  2. Akobundu IO (1987) Weed Science in the Tropics: Principles and Practices. John Wiley and Sons, Chichester, UK, 522 ppGoogle Scholar
  3. Akobundu IO (1992) Integrated weed management techniques to reduce soil degradation. In: Combellack JH, Levick KJ, Parsons J and Richardson RG (eds) Proceedings 1992 First International Weed Control Congress, Vol. 1, pp 278-288. Monash University, Melbourne, AustraliaGoogle Scholar
  4. Akobundu IO and Ekeleme F (1996) Potentials for Chromolaena odorata (L.) R.M. King and H. Robinson in fallow management in West and Central Africa. In: Prasad UK, Muniappan, R, Ferrar P, Aeschliman JP, and de Foresta H (eds) Distribution, Ecology and Management of Chromolaena odorata, pp 88-98. Proc. Third International Workshop on Biological Control and Management of Chromolaena odorata. Agric Expt. Stn. University of Guam, Publication No. 202Google Scholar
  5. Akobundu IO and Agyakwa CW (1998) A Handbook of West African Weeds. International Institute of Tropical Agriculture, Ibadan, Nigeria, 564 ppGoogle Scholar
  6. Akobundu IO, Ekeleme F and Agyakwa CW (1992) Effect of alley farming on weed infestation and floral composition. In: Kang BT, Osiname OA and Larbi A (eds) Alley Farming Research and Development, pp 137-143. Afneta, IITA, Ibadan, NigeriaGoogle Scholar
  7. Awero AO, Obe O and Ayanniyi OO (1992) Effects of shifting and continuous cultivation of cassava (Manihot esculenta) intercropped with maize (Zea mays) on forest alfisol in south-western Nigeria. Journal of Agricultural Science 118: 195-198CrossRefGoogle Scholar
  8. Cavers PB and Benoit DL (1989) Seedbanks in arable land. In: Leck MA, Parker VT and Simpson RL (eds) Ecology of Seedbanks, pp 309-328. Academic Press, San DiegoGoogle Scholar
  9. Dessaint F, Chadoeuf R and Barralis G (1991) Spatial pattern analyses of weed seeds in the cultivated soil seedbank. Journal of Applied Ecology 28: 721-730.CrossRefGoogle Scholar
  10. FDALR (1985). The reconnaissance soil survey of River State, Nigeria (1:250,000): Soil Report. Federal Department of Agriculture, Land Resources Soil Survey Team, Owerri, NigeriaGoogle Scholar
  11. Forcella F (1984) A species-area curve for buried viable seeds. Australian Journal of Agricultural Research 35: 645-652.CrossRefGoogle Scholar
  12. Olaoye, SOA. (1976) Litterfall and nutrient cycling in stands of Eupatorium odoratum Linn (Siam weed) in Nigeria. Proc Ann Conf Weed Sci Soc Nigeria 6: 26-37Google Scholar

Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  1. 1.International Institute of Tropical AgricultureIbadanNigeria

Personalised recommendations