陕北农牧交错带耕地变化及驱动因子分析

根据陕北农牧交错带社会经济统计资料、土地利用调查数据等 ,对该区 5 0年来的耕地变化及驱动因子进行了分析。结果发现 ,耕地变化态势表现为耕地面积总量减少 ,有效灌溉面积和水田比重大大提高 ,旱地比重明显下降 ;粮食作物面积比重有所上升 ,而经济作物、其他作物比重下降 ;耕地投入增加 ;耕地质量趋于下降。造成耕地变化的主要因素是 :人口增长、城市扩张、工矿与交通建设、农业用地内部结构调整、畜牧业发展及退耕还林还草等。最后 ,提出了合理开发利用资源的战略措施

Driving force analysis of farmland use change in agriculture and pasturage interlaced zone of Northern Shaanxi

As one of the environment critical zone and an important chemical and industrial base,agricul ture and pasturage interlaced zone of Northern Shaanxi has been developing fast since the founding of the Peopleps Republic of China.As a result,economy got drastic development,but farmland sharply declined.According to socio-economic statistical data and land use survey data,the paper analyzed farm land change and driving force in the last 50 years.The trend of farm land change is:total area of farm land declined,paddy field increased as well as dry land decreased,proportion of crop land raised as well as economical crop and other land fallen,devotion to farmland increased,farmland quality declined.Themajor driving forces that affect farm land change include:increase of population, urbanization,mine and traffic construction restructuring of agriculture and land conversion from farm land to forest or grassland.