Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/jare.2000.0734 |
Growth performance of exotic and indigenous tree species in saline soils in Turkana, Kenya | |
Oba, G; Nordal, I; Stenseth, NC; Stave, J; Bjora, CS; Muthondeki, JK; Bii, WKA | |
通讯作者 | Oba, G |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS
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ISSN | 0140-1963 |
出版年 | 2001 |
卷号 | 47期号:4页码:499-511 |
英文摘要 | In the arid zone of central Turkana, north-western Kenya, where soil salinity affects 15-20% of the rangelands, growth performances of trees planted in saline soil rehabilitation trials have not been evaluated. Tree-planting trials have emphasised exotic species over indigenous ones. However, advantages and disadvantages of promoting exotic tree species have not been examined. The current study was aimed at evaluating growth performance of seven exotic and nine indigenous tree species used in saline soil rehabilitation trials. The tree species were established from 6-month-old saplings using microcatchments (FT1) from 1988 through 1990 and Fitting treatment (FT2) from 1989 through 1992. The soils in FT1 and FT2 treatments were moderately to highly saline. The exotic tree species produced greater cover and volume during the first year (FT1) but by the second year, production was not sustained due to greater mortality (FT1 8r FT2). The indigenous species in general had higher survival rates. Relative growth rates (RGR) of exotic and indigenous species did not differ (FT1 gr FT2). Tree mortality was negatively correlated with RGR for exotic species in FT1 but not for indigenous ones. However, changes in plant performance were not in response to salinity alone. Rather, water scarcity superimposed on soil salinity might have influenced plant growth performance. Greater water and salinity stress and subsequently greater mortality in exotic species provided a more convincing reason for promotion of indigenous tree species. In the future, knowledge of salinity distribution and selection of indigenous species to match this will be a better way of rehabilitating sires affected by soil salinity in the arid zone of central Turkana, north-western Kenya. (C) 2001 Academic Press. |
英文关键词 | Kenya microcatchments pitting range rehabilitation relative growth rates soil salinity tree growth performance tree mortality tree planting water harvesting |
类型 | Article |
语种 | 英语 |
国家 | Norway ; Kenya |
收录类别 | SCI-E |
WOS记录号 | WOS:000168338400007 |
WOS关键词 | AGROFORESTRY |
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/2XILL650/141059 |
作者单位 | (1)Agr Univ Norway, Ctr Int Environm & Dev Studies, N-1432 As Nlh, Norway;(2)Univ Oslo, Dept Biol, Div Bot & Plant Physiol, N-0316 Oslo, Norway;(3)Univ Oslo, Dept Biol, Div Zool, N-0316 Oslo, Norway;(4)Kenya Forestry Res Inst, KEFRI, Lodwar, Kenya |
推荐引用方式 GB/T 7714 | Oba, G,Nordal, I,Stenseth, NC,et al. Growth performance of exotic and indigenous tree species in saline soils in Turkana, Kenya[J],2001,47(4):499-511. |
APA | Oba, G.,Nordal, I.,Stenseth, NC.,Stave, J.,Bjora, CS.,...&Bii, WKA.(2001).Growth performance of exotic and indigenous tree species in saline soils in Turkana, Kenya.JOURNAL OF ARID ENVIRONMENTS,47(4),499-511. |
MLA | Oba, G,et al."Growth performance of exotic and indigenous tree species in saline soils in Turkana, Kenya".JOURNAL OF ARID ENVIRONMENTS 47.4(2001):499-511. |
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