東南アジア研究
Online ISSN : 2424-1377
Print ISSN : 0563-8682
ISSN-L : 0563-8682
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21 巻, 4 号
選択された号の論文の8件中1～8を表示しています
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論文
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  • Ayut'ia Men in the Service of Burmese Kings, 16th & 17th Centuries
    Than Tun
    1984 年 21 巻 4 号 p. 400-408
    発行日: 1984/03/31
    公開日: 2018/05/31
    DOIhttps://doi.org/10.20495/tak.21.4_400
    ジャーナル フリー
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  • 東南アジア低湿地の土地利用
    福井 捷朗
    1984 年 21 巻 4 号 p. 409-436
    発行日: 1984/03/31
    公開日: 2018/05/31
    DOIhttps://doi.org/10.20495/tak.21.4_409
    ジャーナル フリー
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    This is a review paper on the present use and the future potential of swamp land in insular Southeast Asia. Though most swamp areas have been unutillzed or underutilized, they have some uses, traditional as well as recent. These include the starch extraction from sago palm in Irian Jaya and other islands, the pineapple cultivation on peats in Peninsular Malaysia, and the rice cultivation by tidal irrigation in Sumatra and Kalimantan. In this paper, the land conditions, technology employed, the economy of production, the population involved and their social background, and the limitations and potentials of future development of these uses are first described and discussed. Next, various experimental works on peat soil are reviewed, which include studies of both annual and perennial crops.
     Based on these, several perspective views are presented. They are as follows:
     (a) the equatorial swamp is so unique an ecosystem that efforts should be directed to devising similarly unique farming systems adapted to it rather than to bringing in systems evolved elsewhere by drastically modifying the land conditions;
     (b) the deep peat swamps, of which the underlying mineral layer is so low that gravity drainage would eventually become impossible due to subsidence, should be left untouched given the present state of the art;
     (c) lowland rice could be planted in some parts, but production of surplus rice in any significant amount seems unlikely due to the inherently low labor, if not land, productivity of swampy areas; and
     (d) the low productivity per unit area of swamp land would not itself deter its use, and, therefore, such farming systems that might be low in terms of land productivity but high in terms of labor productivity should be sought.
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  • 東南アジア低湿地の地形
    古川 久雄
    1984 年 21 巻 4 号 p. 437-461
    発行日: 1984/03/31
    公開日: 2018/05/31
    DOIhttps://doi.org/10.20495/tak.21.4_437
    ジャーナル フリー
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    This review paper aims to describe the geographical features of coastal swamp lands in Insular Southeast Asia, mainly in the Indonesian Archipelago. The first of its three chapters is related to the recovery of the paleo-geography of the Sunda Sea. The eustatic submersion of the Sunda Land, which was proposed by Molengraaf and Weber, is considered to give the framework of the natural geography of the area. Modifying findings made more recently by radiocarbon dating and detailed boring studies are also reviewed.
     The second chapter describes the ecological features of the two main environments which predominate the area, namely, mangrove and peat swamp. The peculiar practices of the rice cultivation therein are also described as indicators of the specificity of the environment.
     The third chapter comprises case studies which, based on historical sources, try to indicate the growth and vicissitudes of the coastal lands in the historical period.
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  • 東南アジアの低湿地林
    3. 淡水湿地林
    山田 勇
    1984 年 21 巻 4 号 p. 462-487
    発行日: 1984/03/31
    公開日: 2018/05/31
    DOIhttps://doi.org/10.20495/tak.21.4_462
    ジャーナル フリー
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    Freshwater swamp forest occurs between mangrove/littoral forests and peat swamp/inland forests. This type is usually submerged permanently or temporarily by eutrophic fresh water. The vegetation change from mangrove to fresh-water swamp is gradual; the beginning of fresh-water swamp is marked by the appearance of the palm Oncosperma in most parts of the Malaysian region. The highest trees reach 50m, and many have peculiar root systems, such as buttress, prop, and aerial roots. Although this forest type has been the least surveyed in the tropics, many sites are disappearing with the present lowland development. Species composition, phenology, vegetation types and current development patterns of the freshwater swamp are reviewed.
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