Arid
DOI10.2989/10220119.2013.772539
Rangeland degradation in semi-arid Swaziland: effects of dip-tanks on herbaceous vegetation and soil properties
Tefera, Solomon
通讯作者Tefera, Solomon
来源期刊AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE
ISSN1022-0119
EISSN1727-9380
出版年2013
卷号30期号:3页码:127-140
英文摘要

This study investigated dip-tank use effects on herbaceous vegetation and soil, and relationships between environmental and species variables. Eight dip-tanks, three each in sandy (DPBS) and loamy (DYRL) soils, and two in stony (ROSG) soils were used. Data were collected at 50, 100, 150, 300, 500, 700 and 900 m from each dip-tank. In DPBS, phosphorus and potassium contents were highest (P < 0.05) on approaching dip-tanks. In all soils, forb and perennial grass abundances showed significant differences but there were no significant trends with distance. These variables are not sufficiently sensitive to form gradients or the gradient is diminished with heavy grazing. In DPBS, the canonical correspondence analysis showed negative correlation of distance with bareness, the abundance of Aristida rhiniochloa and Cynodon dactylon, which may suggest these variables may respond to grazing gradients around dip-tanks, but this pattern was not established on the other soil types. Therefore, caution is required in drawing conclusions of the piosphere effect around focal points. The abundance of highly palatable species was low except for Panicum maximum in DPBS. It is concluded that vegetation and soil changes are driven by abiotic (site and soil) and biotic (livestock) factors that have different influences at different scales. Therefore, any rangeland utilisation and management program should consider these drivers.


英文关键词bare patch forbs grass highly palatable Lowveld
类型Article
语种英语
国家South Africa
收录类别SCI-E
WOS记录号WOS:000327079500002
WOS关键词LAND-USE ; MANAGEMENT-SYSTEMS ; CHIHUAHUAN DESERT ; SOUTH-AFRICA ; GRADIENTS ; BOTSWANA ; WATER ; NONEQUILIBRIUM ; WATERPOINTS ; SHRUBLANDS
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/175541
作者单位(1)Univ Ft Hare, Dept Livestock & Pasture Sci, ZA-5700 Alice, South Africa
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Tefera, Solomon. Rangeland degradation in semi-arid Swaziland: effects of dip-tanks on herbaceous vegetation and soil properties[J],2013,30(3):127-140.
APA Tefera, Solomon.(2013).Rangeland degradation in semi-arid Swaziland: effects of dip-tanks on herbaceous vegetation and soil properties.AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE,30(3),127-140.
MLA Tefera, Solomon."Rangeland degradation in semi-arid Swaziland: effects of dip-tanks on herbaceous vegetation and soil properties".AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE 30.3(2013):127-140.
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