JOURNAL OF NATURAL RESOURCES ›› 2012, Vol. 27 ›› Issue (3): 413-421.doi: 10.11849/zrzyxb.2012.03.007

• Resources Ecology • Previous Articles     Next Articles

Main Crops Structural Change and Its Climate Background in Gansu Province during the Past Two Decades

WANG He-ling1, WANG Run-yuan1, ZHANG Qiang1, LIU De-xiang2, PU Jin-yong3   

  1. 1. Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climate Change and Reducing Disaster, Key Laboratory of Arid Climate Change, CMA, Lanzhou 730020,China;
    2. Lanzhou Regional Climatic Center, Lanzhou 730020, China;
    3. Agrometeorological Experimental Station of Tianshui, Tianshui 741020, China
  • Received:2011-03-03 Revised:2011-05-11 Online:2012-03-20 Published:2012-03-20

Abstract: Global warming during the 20th century, especially the impacts of the global warming in the past two decades has been paid much attention worldwide. A case study is made in this paper on the relationship between change of main crops structure and global warming in Gansu Province of Northwest China based on the statistical data of agriculture and ground based climate data during 1985 to 2005. The results showed that in the past 20 years, especially in 1990s, in Hexi Corridor corn and cotton sown area expanded obviously, the proportion of cotton and corn sown area increased significanly, but the proportion of the spring wheat dropped rapidly and retreat extensively to the Qilian shallow mountain region, corn and cotton gradually replaced the wheat in Hexi Corridor and became the main crops. In the central region, the sown area of spring wheat reduced year by year, and winter wheat planting area expanded, the proportion of maize increased year by year also, potato planting scale increased gradually; in the southeastern region, winter wheat and spring wheat planting area decreased year after year, but corn, winter oilseed rape and other cash crops increased year by year. Under global warming, it is proved that temperature change has influenced human society to a certain extent and people began to adapt to the new environment by transferring the land use patterns.

Key words: Gansu Province, global warming, crops, planting structure, K-Means

CLC Number: 

  • S162.5