Worldwide savannas and arid grasslands are mainly used for livestock grazing, providing livelihood to over a billion people. While normally dominated by perennial C4 grasses, these rangelands are increasingly affected by the massive spread of native, mainly woody legumes. The consequences are often a repression of grass cover and productivity, leading to a reduced carrying capacity. While such ...

We evaluated the effects of livestock grazing on C content of the plant-soil system (to 60 cm) of two semi-arid grasslands: a mixed-grass prairie (grazed 12 years), and a short-grass steppe (grazed 56 years). Grazing treatments included season-long grazing at heavy and light stocking rates, and non-grazed exclosures. Significantly higher soil C (0-30cm) was measured in grazed pastures compared ...

Camels are getting increasingly important for pastoral livestock systems in arid and semi-arid rangelands of East Africa that adversely affected by climate change. Cattle more susceptible to drought than camels rely on grass, while primarily browsers. Diet selection can influence the quality milk, especially milk fat. Little is known about differences fatty acid profile compared cattle, under f...

abstract this paper presents a quantitative account of vegetation–environmental factor relationships in arid rangelands. vegetation cover was recorded using braun-blanquet combined abundance-cover scale in each quadrat. within each quadrat, one profile was dug and soil samples being taken at 0-20cm and 20-100cm depths. under study physical-chemical characteristics included texture, lime, organi...

carbon is the most important greenhouse element which sequestrates by photosynthesis procedure and is the easiest and cheapest way of decreasing atmospheric gas level. the vegetation cover that has woody texture is more capable for carbon sequestration. the most plant species of arid rangelands are the shrub growth forms. the purpose of this research was to assess carbon sequestration potential...

a major part of the rangelands of iran are located in arid and semi-arid regions. in this climate, rainfall fluctuation is an important factor which affects vegetation and forage production. in dry years that rainfall decreases, surface vegetation and forage production is damaged. this study was conducted on semi-steppic rangelands of ardebil over nine years (1999-2007), to study of vegetation ...

This study evaluated the bromatological and histological features of native African grasses under grazing in Brazilian semi-arid rangelands. An experimental grid design was used a randomised sampling method for four replicate samples three grasses. The were: Cenchrus ciliaris L., Digitaria pentzii Stent. Megathyrsus maximus (Jacq.). traits analysed included dry matter (DM), crude protein (CP), ...

The aim of this study was to assess the impact short grazing periods with high-stocking density on vegetation during weather conditions favorable plant growth. Continuous is widely practiced in Tunisian arid rangelands and across most drylands deserts Middle East North Africa. In early 1990s, government combined a variety incentives restrictions rangeland practices initiated national strategy f...