Spatio-temporal changes in annual accumulated temperature in China and the effects on cropping systems, 1980s to 2000

Climate Research

Jiyuan Liu¹  Junbang Wang¹  Xinliang Xu¹  Jinwei Dong¹  Fulu Tao¹ 

关键词: Agriculture;    Accumulated temperature;    Climate change;    Cropping system;    China;    Cultivated land;    Land-use change;   

DOI  :  10.3354/cr00823

来源: Inter-Research Science Publishing

【 摘 要 】

ABSTRACT: Change in thermal conditions can substantially affect crop growth, cropping systems, agricultural production and land use. In the present study, we used annual accumulated temperatures >10°C (AAT10) as an indicator to investigate the spatio-temporal changes in thermal conditions across China from the late 1980s to 2000, with a spatial resolution of 1 × 1 km. We also investigated the effects of the spatio-temporal changes on cultivated land use and cropping systems. We found that AAT10 has increased on a national scale since the late 1980s. Particularly, 3.16 × 10⁵ km² of land moved from the spring wheat zone (AAT10: 1600 to 3400°C) to the winter wheat zone (AAT10: 3400 to 4500°C). Changes in thermal conditions had large influences on cultivated land area and cropping systems. The areas of cultivated land have increased in regions with increasing AAT10, and the cropping rotation index has increased since the late 1980s. Single cropping was replaced by 3 crops in 2 years in many regions, and areas of winter wheat cultivation were shifted northward in some areas, such as in the eastern Inner Mongolia Autonomous Region and in western Liaoning and Jilin Provinces.

【 授权许可】

Unknown