中国北西部・乾燥地域における綿花経営者の技術効率性と技術非効率性の要因 : 甘粛省民勤県における事例分析から Technical Efficiency of Cotton Farmers and Sources of Technical Inefficiency in Arid Areas of Northwest China : A Case Study in Minqin County, Gansu Province

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Author(s)

    • 柯 福艶 KE Fuyan
    • 筑波大学大学院生命環境科学科 Graduate School of Life & Environmental. Sciences, University of Tsukuba

Abstract

中国北西部の(半)乾燥地域において,綿花は相対的に付加価値率の高い現金収入作物であり,節水型作物であることから,この地域の基幹作物として位置づけられている。本研究は,中国北西部に位置し,典型的な乾燥地域である甘粛省民勤県の綿花生産を分析対象として,確率的フロンティア生産関数(SFPF)の計測から技術効率性(TE)を推計し、技術非効率性(TIE)に影響を及ぼしている要因を明らかにした.現地調査から圃場レベルのデータを収集した.計測結果から次のことが言える。第一に,限界費用タームで比較すると,灌漑水が綿花生産量に及ぼす最も重要な慣行投入要因であった.第二に,技術非効率性は圃場属性によって影響を受けていたが,経営者属性には影響を受けてなかった.本研究からの示唆として、綿花の技術効率性を改善する余地があり、これによって節約された灌漑水を綿花生産面積の拡大に仕向けることが可能になる.

Northwest China, a large arid area, is experiencing a serious water shortage. Almost 90% of the water is consumed by the agricultural sector. By improving the technical efficiency of water-saving crops, farmers are hopeed to enlarge these crops' cultivation areas and support sustainable development. The stochastic frontier production function (SFPF) is applied to measure the technical efficiency (TE) and the sources of technical inefficiency (TIE) of cotton farmers by a case study in Minqin, Gansu Province. Based on our plot-level survey data, the estimation results showed that 1) the expenditures of electricity powers on pumping the groundwater for irrigation played the most important role in improving the cotton yield when cost was considered; 2) TIE was closely related to the plot-specific characteristics; 3) the attributes of the farm manager, such as his age, education level, and whether or not he was a full-time farmer, did not affect his technical efficiency. The implications are that 1) there is still a room to improve the technical efficiencies of cotton farmers and 2) there is also a room to enlarge the cultivation areas of cotton to substitute for water-intensive crops in arid areas, such as Minqin County.

Journal

  • Journal of the Japanese Society of Agricultural Technology Management

    Journal of the Japanese Society of Agricultural Technology Management 15(3), 172-179, 2009

    Japanese Society of Agricultural Technology Management

References:  11

Codes

  • NII Article ID (NAID)
    110007161155
  • NII NACSIS-CAT ID (NCID)
    AA11646210
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    1341-0156
  • Data Source
    CJP  NII-ELS  J-STAGE 
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