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基于作物空间分配模型的东北三省春玉米时空分布特征
Spatiotemporal changes of maize sown area and yield in Northeast China between 1980 and 2010 using spatial production allocation model

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谭杰扬 1   李正国 1 *   杨鹏 1   刘珍环 2   李志鹏 1   张莉 1   吴文斌 1   游良志 3   唐华俊 1  
文摘 利用1980-2010年东北三省分县玉米播种面积与产量统计、耕地分布、农业灌溉分布以及作物适宜性分布等多源数据,结合基于交叉信息熵原理的作物空间分配模型(Spatial Production Allocation Model, SPAM),在5'×5'的像元尺度模拟了春玉米种植面积与产量的时空分布,并重点分析了两者在纬向、经向,以及高程上的时空变化规律。结果显示:(1)玉米种植面积在2000年前向北扩展至北纬44°~48°间,2000年后在中南部出现大规模发展(北纬42°~44°),并进一步向东扩展至东经123°~127°间,同时还表现为向低海拔(高程100 m以下)和较高海拔(高程200~350 m)扩展的态势;(2)单产在纬向上的增加区主要集中在北纬42°~48°,经向上的单产增加则相对均匀,高程上单产提升区主要集中在海拔350 m以下。(3)像元内玉米种植比例整体上由中低种植比例为主逐步演变为中高比例占据主体,并且中高种植比例像元对应的玉米单产水平整体上较高,反映了市场经济驱动下的玉米种植集聚化和规模化的发展趋势。
其他语种文摘 Understanding crop patterns and their changes on a large scale is a critical requirement for projecting agro-ecosystem dynamics. However, tools and methods for analyzing crop sown area and yield on spatiotemporal variations are still insufficient currently. By the use of cross-entropy method, a Spatial Production Allocation Model (SPAM) was developed. Combined with geographic spatiotemporal analysis methods, a case study was further presented to analyze the spatial characteristics of maize sown area and yield in Northeast China during 1980-2010 within 5' × 5' grid cells. The results indicated the following: (1) Maize sown area mainly expanded northwards during 1980-2000 (located at 44° N-48° N) and then concentrated at central and southern in Northeast China on latitudinal variations in the following years. Also it moved eastwards (located at 123°E to 127°E) and lower elevation (below 100m) as well as higher elevation (mainly from 200 m to 350 m) region on longitudinal and altitudinal variations, respectively. (2) Maize yield which has been improved largely mainly located at 42°N to 48°N and concentrated at the region below the altitude of 350 m on latitudinal and altitudinal variations, respectively, while its increase is relatively homogeneous on longitudinal variations. (3) Additionally, dominant maize proportion on a pixel scale has developed to middle-high proportion gradually during 1980-2010, and maize yield located at the pixel of middle-high proportion seems higher, which reflected the trends of agglomeration and large-scale development of maize cultivation driven by market economy.
来源 地理学报 ,2014,69(3):353-364 【核心库】
DOI 10.11821/dlxb201403007
关键词 春玉米 ; 作物空间分配模型 ; 时空变化 ; 东北三省
地址

1. 中国农业科学院农业资源与农业区划研究所, 农业部农业信息技术重点实验室, 北京, 100081  

2. 中山大学地理科学与规划学院, 广州, 510275  

3. Environment and Production Technology Division, International Food Policy Research Institute, USA, Washington, 20006

语种 中文
文献类型 研究性论文
ISSN 0375-5444
学科 农学(农艺学);农作物
基金 国家自然科学基金项目 ;  国家973计划
文献收藏号 CSCD:5100787

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引证文献 12

1 张梦婷 气候变化背景下中国主要作物农业气象灾害时空分布特征[Ⅰ]:东北春玉米延迟型冷害 中国农业气象,2016,37(5):599-610
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2 徐慧 1980年以来中国大宗作物空间格局变化分析 长江流域资源与环境,2017,26(1):55-66
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