African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 731

Full Length Research Paper

Seedbed preparation influence on morphometric characteristics of perennial grasses of a semi-arid rangeland in Kenya

F. E. O. Opiyo1,4, W. N. Ekaya2,4 D. M. Nyariki3,4 and S. M. Mureithi4*
1Welthungerhilfe e.V German Agro Action P. O. Box 38829-00623, Nairobi, Kenya. 2Regional Universities Forum for Capacity Building in Agriculture (RUFORUM), Plot 151 Garden Hill, Makerere University Main Campus. P.O. Box 7062, Kampala, Uganda. 3Department of Range and Wildlife Sciences, South Eastern University College (SEUCO), Kitui Campus. P.O. Box 170-90200, Kitui, Kenya. 4Department of Land Resource Management and Agricultural Technology, University of Nairobi P.O. Box 29053- 00625, Nairobi, Kenya.
Email: [email protected]

  •  Accepted: 15 June 2011
  •  Published: 31 August 2011


Semi-arid rangelands in Kenya are an important source of forage for both domestic and wild animals. However, indigenous perennial grasses notably Cenchrus ciliaris (African foxtail grass), Eragrostis superba (Maasai love grass) and Enteropogon macrostachyus(Bush rye grass) are disappearing at an alarming rate. Efforts to re-introduce them through restoration programs have often yielded little success. This can partly be attributed to failure of topsoil to capture and store scarce water to meet germination and plant growth requirements. A study was undertaken in the semi-arid environment of eastern Kenya to determine the effects of land treatment on morphometric characteristics of E. superba, C. ciliaris and E. macrostachyus. Seed viability of the grasses was estimated by germination tests. Land treatments involved soil ripping using a tractor and hand-clearing. Thirty-five plants were randomly selected per sub-plot and tagged for sampling. Morphometric characteristics of the grass species were measured weekly. Aboveground biomass was estimated by harvesting standing biomass three months after establishment. Seed viability tests showed significant differences (p<0.05) among the three grass species. This was attributed to intrinsic properties of the grass seeds such as dormancy and tegumental hardness. Seedling survival, foliage cover, plant height, leaf and tiller numbers, and aboveground biomass were significantly higher in ripped plots than hand-cleared plots. It was concluded that soil disturbance influences plant morphometric characteristics and plays an important role in the success rate of restoration attempts in semi-arid rangelands.


Key words: Perennial grasses, morphometric characteristics, hand-clearing, reseeding, ripping, semi-arid rangelands