Revegetation of marginal saline rangelands of southern Tunisia using pastoral halophytes uri icon

abstract

  • Revegetation of marginalised rangelands using pastoral halophytes is considered an appropriate scientific and environmental approach to rehabilitation.Atriplex halimusL. (Amaranthaceae),A. mollisDesf. (Amaranthaceae),Cenchrus ciliarisL. (Poaceae) andLotus creticusL. (Fabaceae) are promising species for arid rangeland rehabilitation, because of their adaptation and palatability. Dry biomass,in vitrodigestibility, ash, nitrogen, neutral detergent fibre, acid detergent fibre and lignin of 50% aboveground biomass (upper half of tufts assumed to be the firstly consumed parts by livestock) of these species were evaluated in the Sidi Makhlouf region of southern Tunisia, during December 2015, June 2016 and December 2016. Digestibility increased with nitrogen content and both of these variables are decreasing when the dry matter and fibre contents increased. Four groups of species were obtained, based on digestibility and nitrogen and lignin contents.A. halimusandL. creticusharvested in the winter of 2015 have superior forage quality.A. molliswas better able to regenerate after winter harvest. Forage quality ofC. ciliarisandL. creticusdecreased with seasonal variation. The rehabilitation of marginal saline dryland remains possible with local pastoral halophytes that produce good forage quality and may provide many economic and environmental benefits for local users.

publication date

  • 2020
  • 2020