The rates of desirable grazing plant species in rangelands : effect of different animal species and grazing pressures
2016
Uzun, F | Ocak, N | Şenel, M Z | Karadağ, Y
The objective of the study was to determine whether increased grazing pressure (GP) or introducing different grazing animal species (AS) such as a different class of stock (DCS), like sheep or goats into a cattle system in pasture communities might be associated with reduced desirables and pasture condition score or increased invaders in the aboveground vegetation. In this study, natural pasture communities grazed by cattle (C: 100 per cent) or by a mix of species (DCS: 41.7 per cent sheep, 15.2 per cent goats and 43.1 per cent cattle) were selected, and the GPs were classified as less than 0.30 (very low, VL), 0.31 to 0.60 (low, L), 0.61 to 0.90 (high, H) and 0.91 (less than) (very high, VH) livestock unit days ha-1. The percentages of shrubs and herbaceous invasive species were higher and lower for communities grazed by C than by DC, respectively. The L and VH showed higher values for decreasers compared to the VL and H. The percentage of shrubs in the communities under H was lower, whereas the percentages of herbaceous invasive species in the communities under VH were lower compared to the other GP. The interaction effects of grazing AS×GP on all studied parameters were significant. The results suggest that increasing GP depending on grazing AS prevents animals from grazing selectively and can contribute to the control of some weeds
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Эту запись предоставил Instituto Agronómico Mediterráneo de Zaragoza