Evaluation of Land Fragmentation and Spatial Dispersion of Paddy Fields on Hilly Terrain in Yunnan, China

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  • 中国雲南省山間地における圃場アクセスが水稲生産に与える影響
  • 中国雲南省山間地における圃場アクセスが水稲生産に与える影響 : 農家/圃場GISデータセットを用いた空間計量経済分析
  • チュウゴク ウンナンショウ サンカンチ ニ オケル ホジョウ アクセス ガ スイトウ セイサン ニ アタエル エイキョウ : ノウカ/ホジョウ GIS データセット オ モチイタ クウカン ケイリョウ ケイザイ ブンセキ
  • Spatial Econometric Analysis Using an Integrated Dataset of Household Survey Data and GIS Data
  • ー農家／圃場GISデータセットを用いた空間計量経済分析ー

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Abstract

<p>Hani rice terraces, the rice terraces in Yunnan, China, are internationally appreciated. However, due to decreasing labor with the outflow of migrant workers, the rice terraces have deteriorated. To achieve sustainable agricultural production, improving productivity is necessary. The rice terraces stretch in the mountainous area with heterogeneous, fragmented, and poor access farmland. Previous studies have pointed out that land fragmentation and poor access to the fields reduces productivity; however, these spatial distributions and heterogeneity can cause estimation bias. The spatial effects cannot be ignored; however, they have not been explicitly addressed. We used GPS/GIS and spatial econometric models to control the household attributes and spatial correlations. We estimated the effect of field access on yield per unit. As a result, yield per unit was significantly reduced in the difficult-to-access fields. A series of estimation results imply that poor access to the fields lowers land productivity by increasing the required labor input.</p>

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