干旱区生态环境知识资源中心(Arid): Short-term grazing exclusion impacts using brush packs on soil and grass layers in degraded communal rangelands of semi-arid South Africa and implications for restoration and pasture utilization

Arid

DOI	10.17138/TGFT(8)220-233
	Short-term grazing exclusion impacts using brush packs on soil and grass layers in degraded communal rangelands of semi-arid South Africa and implications for restoration and pasture utilization
	Kwaza, Ayanda; Tefera, Solomon; Mlambo, Victor; Keletso, Mopipi
通讯作者	Tefera, S
来源期刊	TROPICAL GRASSLANDS-FORRAJES TROPICALES
ISSN	2346-3775
出版年	2020
卷号	8 期号:3 页码:220-233
英文摘要	Brush packs from very thorny tree branches were used to simulate grazing exclosures to measure differences in herbaceous vegetation and soil characteristics over 2 years on small ungrazed plots and large continuously grazed communal rangelands on 3 semi-arid soil types [shallow, red stony ground (SRSG); shallow, dark sandy loam (SDSL); and deep, dark clay-loam (DCL)]. Pasture presentation yields within exclosures exceeded those on continuously grazed areas for all soil types by: 98% (SRSG), 128% (SDSL) and 152% (DCL). Herbage samples harvested from the exclosures contained higher acid detergent fiber (P<0.001) and acid detergent lignin (P<0.05) concentrations than those from the grazed areas. In SRSG and SDSL soils, herbage samples harvested from the exclosures were deficient in phosphorus (P) for all livestock species. Depending on soil type(s), soil magnesium, organic carbon, nitrogen, P and manganese concentrations were significantly higher within exclosures than in continuously grazed areas (P<0.05). Any response from nutrients supplied by leaf drop from the brush packs could not be separated from response due to absence of grazing, and this deserves further investigation. Our results indicate that grazing exclusion for short periods (2 years) on these semi-arid rangelands allowed pastures to produce significant growth, demonstrating that pastures were still productive. Our experiences highlighted the difficulties in erecting and retaining conventional fences to exclude livestock from given areas because of theft. Grazing immediately after vegetation recovery may necessitate judicious nutritional intervention with protein, energy and mineral supplementation to get effective utilization of the available forage.
英文关键词	Exclosure grass biomass herbage land degradation organic carbon pasture composition
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000576792700007
WOS关键词	CARBON SEQUESTRATION ; LAND-USE ; VEGETATION ; SAVANNA ; MANAGEMENT ; ECOSYSTEM ; DYNAMICS ; STEPPE
WOS类目	Agriculture, Dairy & Animal Science ; Agronomy ; Plant Sciences
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326722
作者单位	[Kwaza, Ayanda; Tefera, Solomon; Keletso, Mopipi] Univ Ft Hare, Dept Livestock & Pasture Sci, Private Bag X1314, ZA-5700 Alice, South Africa; [Mlambo, Victor] Univ Mpumalanga, Sch Agr Sci, Siyabuswa, South Africa
推荐引用方式 GB/T 7714	Kwaza, Ayanda,Tefera, Solomon,Mlambo, Victor,et al. Short-term grazing exclusion impacts using brush packs on soil and grass layers in degraded communal rangelands of semi-arid South Africa and implications for restoration and pasture utilization[J],2020,8(3):220-233.
APA	Kwaza, Ayanda,Tefera, Solomon,Mlambo, Victor,&Keletso, Mopipi.(2020).Short-term grazing exclusion impacts using brush packs on soil and grass layers in degraded communal rangelands of semi-arid South Africa and implications for restoration and pasture utilization.TROPICAL GRASSLANDS-FORRAJES TROPICALES,8(3),220-233.
MLA	Kwaza, Ayanda,et al."Short-term grazing exclusion impacts using brush packs on soil and grass layers in degraded communal rangelands of semi-arid South Africa and implications for restoration and pasture utilization".TROPICAL GRASSLANDS-FORRAJES TROPICALES 8.3(2020):220-233.