Rice area change in Northeast China and its correlation with climate change.

doi:10.13287/j.1001-9332.201608.036

Abstract

Abstract: Based on the time-series map of rice area, a spatial production allocation model (SPAM) which has been applied for mapping the global level crop allocation datasets was deve-loped to simulate the spatio-temporal dynamics of rice area in Northeast China during 1980-2010 within 5′×5′ grid cells. The spatio-temporal variations of rice area with temperature and precipita-tion during past 30 years were explored. The results indicated that the rice area expanded significantly northwards to46° N before 2000. After that, the increased sown area mainly occurred in the northern parts of Northeast China. Meanwhile, rice area also expanded eastwards to 131° E and toward the higher elevation regions (above 200 m). Due to a northward movement of accumulated temperature belts, the new rice area mainly appeared in the regions with an annual accumulated temperature (AAT) between 2800 and 3400 ℃·d. The trend of precipitation during the study period increased before 2000 and decreased afterwards. The increased rice area was found mainly in the regions with precipitation range from 300 mm to 600 mm.

Key words: spatial response, rice, climate change, Northeast China., crop spatial allocation model

CHEN Hao, LI Zheng-guo, TANG Peng-qin, HU Ya-nan, TAN Jie-yang, LIU Zhen-huan, YOU Liang-zhi, YANG Peng. Rice area change in Northeast China and its correlation with climate change.[J]. Chinese Journal of Applied Ecology, 2016, 27(8): 2571-2579.

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