Can Shifting Cultivation on Acid Soils in the Southeast Asia Be Sustainable in the Future? A Case Study in Northern Laos

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概要

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• Sustainability of the local shifting cultivation practice in the mountainous region of Northern Laos was investigated. Due to low fertility of the soils derived from shale and its strongly weathered and acidic nature in the eastern side of the Nam Khan River watershed, shortening of the fallow period to produce enough amount of upland rice for the local population would not be sustainable any more. On the other hand, the eroded materials from limestone range were added to the soils in the western side of watershed which made the soil more fertile. Based on the calculated population capacity by Carneiro's equation, a system with 2- or 3-year fallow for 1-year cultivation can be the maximum to afford the current population. To make the shifting cultivation system more sustainable, introduction of fallow system with a tree species, paper mulberry (Broussonetia papyrifera) could be a good option to be proposed.

• 社団法人日本土壌肥料学会の論文

著者

• SAKURAI Katsutoshi

  Faculty of Agriculture, Kochi University

• Tanaka Sota

  Kochi Univ. Kochi Jpn

• Tanaka S

  Graduate School Of Kuroshio Science Kochi University

• Tanaka S

  Faculty Of Agriculture Kochi University

• Tanaka Sota

  Faculty of Agriculture, Kochi University

• Nouanthasing Lasay

  Soil Survey and Land Classification Center, National Agriculture and Forestry Research Institute,Min

• Sakurai Katsutoshi

  Faculty Of Agriculture Kochi University

• OKABAYASHI Yukoh

  Faculty of Agriculture, Kochi University

• BOONYANUPHAP Jaruntorn

  The United Graduate School of Agriculture Science, Ehime University

• BOONYANUPHAP Jaruntorn

  United Graduate School of Agricultural Sciences, Ehime University

• Watanabe Etsuko

  United Graduate School of Agricultural Science, Ehime University

• Nouanthasing Lasay

  Soil Survey And Land Classification Center National Agriculture And Forestry Research Institute Mini

• Tanaka Sota

  Faculty Of Agriculture Kochi University

• Sakurai Katsutoshi

  Kochi Univ. Nankoku Jpn

• Watanabe Etsuko

  United Graduate School Of Agricultural Science Ehime University

• Okabayashi Yukoh

  Faculty Of Agriculture Kochi University

• Boonyanuphap Jaruntorn

  The United Graduate School Of Agriculture Science Ehime University

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