农牧交错带典型偏农区土地利用变化及其原因分析——以奈曼旗尧勒甸子村为例

中国北方农牧交错带东部农业以种植业为主。土地利用变化对农业的可持续发展具有深刻的影响。勒甸子村是农牧交错带典型的偏农区，50a来土地利用发生很大变化。其变化表现出明显的阶段性，20世纪80年代前后明显不同。本文主要分析了农业用地和沙漠化土地的变化，并从国家政策、土地产权制度、人口、牲畜、系统结构等方面的变化探讨了其土地利用变化的原因。

Land Use Changes and Its Causes in Typical Agricultural Region of Agri-Grazing-Ecotone--A Case Study in Village Yaoledianzi, Naiman Banner in Inner Mongolia

Planting is dominant in the east of ecotone between agriculture and animal husbandry in Northern China. Land use changes have profound influences on the sustainable development of agriculture. Village Yaoledianzi lies in the agri\|grazing\|ecotone and inclines to agriculture. There has happened great changes during the past 50 years in its land uses and the course of changes can be divided into two phases by 1980s. This paper emphasizes the changes of farmlands and desertification lands. Before 1980s the area of tilth and desertification lands increased, that of meadow decreased, there was no woodland, and all of the tilthes were drylands. After 1980s the area of desertification lands decreased, that of meadow and woodland increased, and irrigated lands became the large proportion in tilth. And the paper discusses the causes of land use change from national policy, property right of land, population, livestock and system structure. Key words: agricultural region in agri\|grazing\|ecotone; village Yaoledianzi; land use change; causes; Naiman Banner