棉 花 学 报 Cotton Science 2007，19(1)：64-68
Study of Comparative Advantage of Cotton Producting Counties in China Abstract：Based on the previous research on comparative advantage of crops，the unit yield， concentrated extent and integrated comparative advantage index were calculated from the data of more than 2000 counties nationwide in cotton production between 1997 and 1999. The information illustrated the distribution of comparative advantage of cotton production in China. The various comparative advantage category of the counties was expressed visually on the 1∶4000000 scale map with Arcview，a GIS software. It indicated that there were 665 counties of comparative advantage in unit yield，428 in concentrated extent and 426 in integrated advantage. The countries of unit yield comparative advantage were distributed primarily over Xinjiang，the neighboring part of Gansu and Inner Mongolia. The others were concentrated in the east. The regions of high value of unit yield comparative advantage index were mainly located in Xinjiang，Jiangxi，Hunan，Hubei and Shangdong，orderly. The distribution of concentrated extent comparative advantage counties was similar to those in integration，and it was more concentrated in region compared with that of the unit yield one. It indicated that the difference of advantage was mostly caused by the different plant area，but little by the unit yield. The countries of concentrated extent and integrated comparative advantage were concentrated in Xinjiang，the neighboring part of Gansu and Inner Mongolia. They were also scattered around northwest of Shandong，southeast of Hebei，east of Henan，Anhui，east of Jiangsu，east of Hubei and the southwest of Henan. Henan had the higher number of the concentrated extent and integrated comparative advantage countries，but lower value of the two advantage indexes. The region of the highest value was in Xinjiang，especially in the south edge of the Junggar Basin and the north edge of the Tarim Basin.
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