Spatio-temporal dynamics of maize cropping system in Northeast China between 1980 and 2010 by using spatial production allocation model

Understanding crop patterns and their changes on regional scale is a critical re- quirement for projecting agro-ecosystem dynamics. However, tools and methods for mapping the distribution of crop area and yield are still lacking. Based on the cross-entropy theory, a spatial production allocation mod...

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Bibliographic Details
Published in:Journal of geographical sciences 2014-06, Vol.24 (3), p.397-410
Main Authors: Tan, Jieyang, Yang, Peng, Liu, Zhenhuan, Wu, Wenbin, Zhang, Li, Li, Zhipeng, You, Liangzhi, Tang, Huajun, Li, Zhengguo
Format: Article
Language:English
Subjects:
Agricultural ecosystems
Agricultural production
Asia
Bgi / Prodig
Cereal crops
China
Corn
Crop yield
Cropping systems
Earth and Environmental Science
Ecosystem dynamics
Geographical Information Systems/Cartography
Geography
Nature Conservation
Physical Geography
Planting density
Remote Sensing/Photogrammetry
Zea mays
中国东北地区
作物系统
使用空间
分配模型
时空动态
玉米种植
生产
生态系统动力学
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Summary:Understanding crop patterns and their changes on regional scale is a critical re- quirement for projecting agro-ecosystem dynamics. However, tools and methods for mapping the distribution of crop area and yield are still lacking. Based on the cross-entropy theory, a spatial production allocation model （SPAM） has been developed for presenting spa- tio-temporal dynamics of maize cropping system in Northeast China during 1980-2010. The simulated results indicated that （1） maize sown area expanded northwards to 48~N before 2000, after that the increased sown area mainly occurred in the central and southern parts of Northeast China. Meanwhile, maize also expanded eastwards to 127°E and lower elevation （less than 100 m） as well as higher elevation （mainly distributed between 200 m and 350 m）; （2） maize yield has been greatly promoted for most planted area of Northeast China, espe- cially in the planted zone between 42°N and 48°N, while the yield increase was relatively homogeneous without obvious longitudinal variations for whole region; （3） maize planting density increased gradually to a moderately high level over the investigated period, which reflected the trend of aggregation of maize cultivation driven by market demand.
ISSN:1009-637X
1861-9568
DOI:10.1007/s11442-014-1096-0