Adv. Clim. Change Res., 2010, 6 2 123J129 123.nullnonmarkingreturn “.null6.null.null2.null2010.null3.null ADVANCES IN CLIMATE CHANGE RESEARCHVo l. 6 No. 2March 2010.nullnonmarkingreturn “1673-1719 2010 02-0123-07.nullnonmarkingreturn “.nullnonmarkingreturn.nullnonmarkingreturn “ wheat middle panels; corn bottom panels planting areas in 1980J2007.nullnonmarkingreturn “.nullnonmarkingreturn “.nullnonmarkingreturn “.null.nullnonmarkingreturn “.nullnonmarkingreturn “.nullnonmarkingreturn “ the paddy rice planting proportion changed in opposite trends in northernand southern China, and its change has become slower; the corn planting proportion continued to increase, itschange was enlarging; the planting structure of the three main grain crops paddy rice, wheat and corn all changedin 2000 with different increasing/declining trends. Furthermore, the crops ripe system and the multiple croppingindex also changed obviously; the north boundary of crops planting has continuously moved northward. The winterwheat planting area in northern China in 2007 moved northward by nearly 100 km compared with the 1960s. Thepaddy rice planting area has greatly expanded in Heilongjiang Province, where the paddy rice has dominated in theoriginal corn planting areas.Key words climate change; planting structure; wheat; corn; paddy rice[4][5][6].null.nullnonmarkingreturn “[J]. .nullnonmarkingreturn “, 2001, 20 3 254J261.nullnonmarkingreturn , .nullnonmarkingreturn , .nullnonmarkingreturn . .nullnonmarkingreturn “*,-./.nullnonmarkingreturn 50.nullnonmarkingreturn “[J]. .nullnonmarkingreturn “, 2004 1 13J15.nullnonmarkingreturn , .nullnonmarkingreturn “50.nullnonmarkingreturn “20.nullnonmarkingreturn “[D]nullnonmarkingreturn .nullnonmarkingreturn “. 2004 32J33.nullnonmarkingreturn , .nullnonmarkingreturn . .nullnonmarkingreturn “*,-[J]. .nullnonmarkingreturn .nullnonmarkingreturn , 2007, 3 4 229J233.nullnonmarkingreturn , .nullnonmarkingreturn , .nullnonmarkingreturn, .null. .nullnonmarkingreturn “20.nullnonmarkingreturn “.nullnonmarkingreturn “[J]. .nullnonmarkingreturn “, 2005, 20 5 697J705.nullnonmarkingreturn, .nullnonmarkingreturn , .nullnonmarkingreturn , .null. .nullnonmarkingreturn “*,-..null[J]. .nullnonmarkingreturn , 2008, 28 3 1210J1218.nullnonmarkingreturn . .nullnonmarkingreturn20.nullnonmarkingreturn “*,-./0123.nullnonmarkingreturn “[D]. .nullnonmarkingreturn .nullnonmarkingreturn “, 2004 44.nullnonmarkingreturn. .nullnonmarkingreturn “.null.nullnonmarkingreturn “[D]. .null.null .nullnonmarkingreturn “, 2008 17.nullnonmarkingreturn, .nullnonmarkingreturn , .nullnonmarkingreturn , .null. .nullnonmarkingreturn “*,-..null[J]. .nullnonmarkingreturn , 2005, 27 1 121J127.nullnonmarkingreturn , .nullnonmarkingreturn, .nullnonmarkingreturn , .null. .nullnonmarkingreturn “*,-..nullnonmarkingreturn[J]. .nullnonmarkingreturn , 2008, 28 8 3760J3768.nullnonmarkingreturn . .nullnonmarkingreturn “[J]. .nullnonmarkingreturn “, 1998 186J89.nullnonmarkingreturn . .nullnonmarkingreturn “[M]. .nullnonmarkingreturn .nullnonmarkingreturn “, 1961 70J84.nullnonmarkingreturn , .nullnonmarkingreturn , .nullnonmarkingreturn . .nullnonmarkingreturn “[J]. .nullnonmarkingreturn .nullnonmarkingreturn , 2001, 22 2 53J57.nullnonmarkingreturn . .nullnonmarkingreturn “[M]. .nullnonmarkingreturn .nullnonmarkingreturn “, 1996 870J884.nullnonmarkingreturn , .nullnonmarkingreturn , .nullnonmarkingreturn, .null. .nullnonmarkingreturn “ [J]. .nullnonmarkingreturn.nullnonmarkingreturn, 2008, 34 3 12J17[7][8][9][14][15][16][17][12][13][11][10]