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题名: Mitigating soil erosion through farm-level adoption of soil and water conservation measures in Samanalawewa Watershed, Sri Lanka
作者: Udayakumara, E. P. N.1; Shrestha, R. P.2; Samarakoon, L.3; Schmidt-Vogt, D.4
刊名: ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE
关键词: Human-induced erosion ; land degradation ; logistic regression ; natural erosion ; soil conservation policy
英文摘要: Soil erosion by water is currently one of the most notable types of land degradation in Samanalawewa Watershed in Sri Lanka, creating copious environmental and socioeconomic impacts. Thus, with the aim of detecting and mapping the rates of human-induced soil erosion in the watershed, remote sensing and geographic information system based modelling and field experiments were carried out. The results of the assessment disclosed that the present rate of human-induced soil erosion varies from 0 to 289 t ha(-1) yr(-1) with the majority of the area exceeding the natural rate of soil erosion by 14 to 33 times at present. However, the average rate of human-induced soil erosion has declined dramatically from 19.8 to 4.3 t ha(-1) yr(-1) from 1986 to 2008. In order to analyse the significant determinants of farm-level adoption of soil and water conservation measures, binary logistic regression procedure was applied using the data collected through a household survey (n = 201). The most significant (p < 0.01) variables of the study were the farmers' perceptions of soil erosion problems, gender of the household head, training on soil and water conservation, and ascertained advice from agricultural extension officers while the variables regarding past awareness about soil conservation technologies and off-farm income were significant at p < 0.05. Furthermore, the study revealed that the majority (60.2%) of the farmers in the study area had been adopting different types of soil and water conservation measures for a prolonged period of time. Therefore, owing to the current decreasing rate of soil erosion, the soil and water conservation costs and the ratios of human-induced soil erosion vs natural soil erosion had declined significantly while the productivity of their lands had gone up.
出版日期: 2012
卷号: 62, 期号:3, 页码:273-285
DOI标识: 10.1080/09064710.2011.608708
语种: 英语
ISSN号: 0906-4710
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/10503
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Sabaragamuwa Univ Sri Lanka, Fac Sci Appl, Dept Nat Resources, Belihuloya, Sri Lanka
2.Asian Inst Technol, Sch Environm Resources & Dev, Pathum Thani 12120, Thailand
3.Asian Inst Technol AIT, Geoinformat Ctr, Pathum Thani 12120, Thailand
4.Chinese Acad Sci, Kunming Inst Bot, Heilongtan 650204, Kunming, Peoples R China

Recommended Citation:
Udayakumara, EPN; Shrestha, RP; Samarakoon, L; Schmidt-Vogt, D.Mitigating soil erosion through farm-level adoption of soil and water conservation measures in Samanalawewa Watershed, Sri Lanka,ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE,2012,62(3):273-285
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