Selection of suitable ecotypes withinDigitaria erianthafor reclamation and restoration of disturbed areas in southern Africa

@article{Theunissen1997SelectionOS,
  title={Selection of suitable ecotypes withinDigitaria erianthafor reclamation and restoration of disturbed areas in southern Africa},
  author={J. D. Theunissen},
  journal={Journal of Arid Environments},
  year={1997},
  volume={35},
  pages={429-439}
}
  • J. Theunissen
  • Published 1 March 1997
  • Biology
  • Journal of Arid Environments
Abstract The gradual decline in the ecological condition of natural pastures as a result of over-utilization and the application of insufficient management decisions, coupled with the detrimental effects of long-term drought, has left extensive areas of high potential grazing land in southern Africa in urgent need of restoration. However, due to the limited number of grasses currently available for rehabilitating and restoring the vast number of different habitats encountered, an extensive… 
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References

SHOWING 1-10 OF 25 REFERENCES

An ecosystematic investigation of Eragrostis racemosa (Poaceae:Eragrostideae) in the semi-arid grasslands of southern Africa

Biomass production of different ecotypes of threegrass species of the semi-arid grasslands of southern Africa

Phenolic compounds in the leaves of ecotypes of three graminoides in the semi-arid grasslands of southern Africa

Results obtained clearly indicate that ecotypes of these species exhibit a significant degree of variation with regard to percentage PCC and total phenolics, which will assist rangeland ecologists in identifying functional ecotypes within grass species, thus facilitating the understanding and interpretation of vegetation dynamic models and rangelands condition assessments.

Influence of habitat differences on the ecological grouping of grass species on a grazing gradient

The ecological grouping (Decreaser and Increaser groups) of individual species was determined on two topographical units in the Highland Sourveld of the Orange Free State with special attention to fence‐line comparisons, vegetation at different distances from watering points and ungrazed vegetation.

Habitat preferences of twenty‐seven grasses

Abstract A statistical analysis of species/habitat data from 521 sites in the Orange Free State is presented with a view to establishing relationships for use in aerial photograph interpretation.…

Variation in important pasture grasses. II. Cytogenetic and reproductive variation.

The chromosome numbers and reproductive variation of seven important pasture grasses from South Africa are compared. This comparison indicates that all these species form polyploid complexes, all…

A NEW CLEARING-SQUASH TECHNIQUE FOR THE STUDY OF OVULE DEVELOPMENT IN ANGIOSPERMS'

A B S T R A C T The simple, efficient method described here for the study of ovule and megagametophyte development in angiosperms provides for the extension of investigation beyond the limits imposed…

Permanent odd polyploidy in a grass (Andropogon ternatus)

The results of interspecific crosses with a taxonomically related diploid species (A. selloanus) as well as the study of pollen grain development suggest that the grains carrying nuclei with 20 chromosomes (geno...

Studies on Digitaria (Poaceae) I. Enumeration of species and synonymy

  • P. Kok
  • Biology, Environmental Science
  • 1984

An ecosystematic investigation of two graminoids (Digitaria eriantha and Setaria sphacelata var

  • torta) in the semi-arid grasslands of southern Africa. Botanical Bulletin of Academia Sinica, 33: 123–132.
  • 1992