以东北地区为例,结合监测数据和农业统计数据,利用GIS技术分别开展耕地数量变化对粮播面积的影响分析、高中低产田内部各县粮食单产变化趋势分析、高中低产田内部耕地数量变化对粮食总产的影响以及粮食作物种植结构变化对粮食生产能力的影响评价与分析。结果表明:①东北地区耕地数量增加了188.8×104hm2,总体呈北增南减趋势;②粮播面积增加了162.67×104hm2,高产区的粮食单产多呈上升趋势,中产区的粮食单产稳中有升,低产区各县的粮食单产有增有减,但多数仍呈上升趋势;③高产田的粮食单产和低产田作物种植面积扩大促进了东北地区粮食总产的增加;④东北地区玉米生产进一步向吉林省集中,大豆、水稻、小麦向黑龙江集中,粮食生产的专业化、区域化趋势明显。
To research the changing patterns of current regional cultivated land and explore its impact on grain productivity is of great significance.Taking Northeast China as a study area,this paper analyzed the impact of the cultivated land change on grain sown area,per unit grain yield and total grain yield,and also the impact of the change of main crop planting structure on grain yield.The result shows: ⑴The cultivated land increased 188.8×104ha with a general trend of increase in the northern part and decrease in the southern part in view of the spatial distribution.⑵The grain sown area has increased 162.67×104ha.Per unit grain yield in most high-yield cultivated land presented an increase trend;per unit grain yield in mid-yield cultivated land presented a steady-going trend and furthermore with little increase in a few places;the changing trend of per unit grain yield in most low-yield cultivated land presented an increase trend.⑶The area of high-yield cultivated land,mid-yield cultivated land and low-yield cultivated land increased by 34.44×104ha,12.57×104ha and 141.83×104ha respectively,but their increase amount of grain yield was 305.04×104t,14.25×104t and 122.88×104t respectively.This shows the increase of both per unit grain yield in high-yield cultivated land and area of low-yield cultivated land promoted the increase of total grain yield in Northeast China.⑷The grain yield of four major crops in Northeast China presented different changing trends: the corn presented an "increase-decrease-increase" trend,the rice and wheat presented an "increase-decrease" trend and the bean yield increased continuously.The grain sown area of the four major crops presented a fluctuated changing trend: the corn presented an "increase-decrease-increase" trend,the bean sown area increased continuously,the rice sown area presented little increase and wheat presented an "increase-decrease" trend.In view of the regional difference,the corn production in Northeast China was further concentrated in Jilin province while that of bean,rice and wheat production further concentrated in Heilongjiang province.In a word,the grain production in Northeast China presented an obvious specialization and regionalization trend.
[1] B row n Lester. W hoW illFeed Ch ina? Wake-Up C all for a Sma llP lan et[M] . W W Norton for theW orldW atch Inst itu te, N ew York, 1995.
[2] 何艳芬, 张柏, 马超群. 吉林省耕地动态变化及其对粮食生产的影响[J] . 资源科学, 2004, 26 (4): 119～125. [HE Y an-fen, ZHANG B a,i MA C hao-qun. Dynam ic change of cu lt ivated land and its im pact on grain production in J ilin prov-in ce. Resources S cience, 2004, 26(4): 119-125.]
[3] 邵晓梅. 区域土地利用变化及其对粮食生产影响分析——以山东省为例[J] . 地理科学进展, 2003, 22 (1): 30～37. [SHAO X iao-m e.i An analysis on the ef fect of regional land use change on gra in produ ct ion-A case study in Shandong p rov ince. P rogress in Geography, 2003, 22 (1): 30-37.]
[4] 陈佑启. 我国耕地利用变化及其对粮食生产的影响[J] . 农业工程学报, 2000, 16 (6): 29～32. [CH EN Y ou-q.i Ara-b le-land u se change and its effects on the grain p roduction in Ch ina. T ransac tions of th eCh in ese S ociety of Agricu ltura lEng i-neering, 2000, 16(6): 29-32.]
[5] 陈佑启, PeterH V erburg, 唐华俊. 我国土地利用变化及其对粮食生产影响的建模分析[J] . 中国土地科学, 2000, 14 (4): 22～26. [CH EN You-q ,i PeterH Verburg, TANG H ua-jun. Modeling analysis of land use change and its effects on th e grain produ ct ion. Ch ina L and Sc ience, 2000, 14(4): 22-26.]
[6] 陈百明, 周小萍. 中国近期耕地资源与粮食综合生产能力的变化态势[J] . 资源科学, 2004, 26(5): 38~ 45. [CHEN Ba i-m ing, ZHOU X iao-p ing. Changes of agriculture resources and grain com prehens ive p roduct ive capacity of Ch ina in re-cen t years. R esources S cience, 2004, 26 (5): 38-45.]
[7] 周小萍, 卢艳霞, 陈百明. 中国近期粮食生产与耕地资源变化的相关分析[J]. 北京师范大学学报(社会科学版) , 2005, (5): 122~ 127. [ZHOU X iao-p ing, LU Yan-xia, CH EN Ba i-m ing. C orrelation of grain p roduction and cu ltivation land resources changes in recen t Ch ina. Journa l of B eijingN orma l Un iv ersity, 2005, (5): 122-127.]
[8] 傅泽强, 蔡运龙, 杨友孝, 等. 中国粮食安全与耕地资源变化的相关分析[J] . 自然资源学报, 2001, 16 (4): 313~ 319. [FU Ze-q iang, CA IYun-long, YANG You-xiao, et a.l Research on the relat ionsh ip of cult ivated land change and food se-curity in Ch ina. Jou rnal ofN a tura l Resources, 2001, 16 (4): 313-319]
[9] 俞海, 黄季焜, Scot tRozelle, 等. 中国东部地区耕地土壤肥力变化趋势研究[J] . 地理研究, 2003, 22 (3): 380～388. [YU H a,i HUANG J i-kun, S cottRozelle, et a.l Soil fert ility changes of cu ltivated land in eastern Ch ina. Geog raph ica lR e-search, 2003, 22 (3): 380-388.]
[10] 司成兰, 濮励杰. 广西土地利用变化及对粮食生产的影响[J] . 农村生态环境, 2004, 20 (2): 12～15. [S I C heng-lan, PU L i-jie. E ffect of region al land use change on grain produ ct ion-A case study ofGuangx iAutonom ou sRegion. Ru ral Eco-env ironm ent, 2004, 20(2): 12-15.]
[11] 赵翠薇, 濮励杰. 贵州省50 年来耕地资源数量变化特征及其与粮食产量的关系研究[J] . 南京大学学报(自然科 学) , 2005, 41(1): 105~ 112. [ZHAO Cu i-w e,i PU L i-jie. R elationsh ip betw een the arab le land change and the gra in p roduction inGu izhou p rov ince during th e past 50 years. Jou rnal of N an jing University (Na tural Sc iences) , 2005, 41 (1): 105-112.]
[12] 程叶青, 张平宇. 东北商品粮基地粮食生产的区域分异[J]. 自然资源学报, 2005, 20(6): 925～931. [CH ENG Y e-q ing, ZHANG P ing-yu. Region ald ifferen tiat ion of grain produ ct ion of comm od ity grain b ases inN orth eastCh in a. Jou rnal ofN a tura l Resources, 2005, 20(6): 925-931.]
