耕地地力演变及其与种植业结构关系分析

本文以辽宁省西部典型低山丘陵区阜新蒙古族自治县(简称阜蒙县)为研究区,以2011年土地变更调查数据库中耕地图斑为评价单元,研究1980~2011年30年来耕地地力时间和空间的变化情况,并探讨其与种植业结构变化的关系。结果表明:地力演变为提升型、衰退型和平衡型的耕地面积分别占耕地总面积的50.70%、18.77%和30.53%;地力演变总体呈现东部和中部升高,南部和西部降低的趋势,并且与种植业结构关系密切;优化玉米和花生的种植业结构有助于耕地地力的提升;针对当地实际情况,提出耕地地力提升的措施。

Evolution of Cultivated Land Productivity and Its Relationship with Planting Structure

Taking cultivated land in western typical low mountains and hills region-Fuxin Mongolian autonomous county (Fumeng County) in Liaoning Province as study area,the spatial-temporal changes of cultivated land productivity from 1980 to 2011 were investigated as well as its relationship with planting based on GIS.Cultivated land patches from land survey database of Fumeng County in 2011 were used as basic evaluation units.The results showed that the area percentage of productivity improved,balanced (± 5％) and declined type accounted for 50.70％,30.53％ and 18.77％,respectively.The cultivated land productivity increased in the eastern and middle zones and decreased in the southern and western zones.There was a close relationship between cultivated land productivity and planting structure.Cultivated land productivity was promoted by the optimized planting structure of maize and peanut.This paper also proposed a few promotion measures according to local actual conditions in Fumeng County.