近30年中国东北地区玉米种植体系的时空动态分析(英文)

编号 zgly0001584929

文献类型 期刊论文

文献题名 近30年中国东北地区玉米种植体系的时空动态分析(英文)

作者 谭杰扬  杨鹏  刘珍环  吴文斌  张莉  李志鹏  游良志  唐华俊  李正国 

作者单位 KeyLaboratoryofAgri-informatics  MinistryofAgriculture/InstituteofAgriculturalResourcesandRegionalPlanning  ChineseAcademyofAgriculturalSciences  GeographyandPlanningSchoolofSunYat-senUniversity  EnvironmentandProductionTechnolo 

母体文献 Journal of Geographical Sciences 

年卷期 2014年03期

年份 2014 

分类号 S513 

关键词 springmaize  spatialproductionallocationmodel  spatio-temporalpattern  NortheastChina 

文摘内容 Understanding crop patterns and their changes on regional scale is a critical requirement 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 spatio-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, especially 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.