从西吉县梯田建设看山坡地资源的更新

On Renewal of Slope-Land Resources in the View of Construction of land Terracing at Xiji County

山坡地资源是丘陵区重要的农业基础资源，因受自然因素和人为因素的影响，资源流失和退化严重，本文根据坡改梯对生态环境的保护功能及其生产力动态变化，初步提出了丘陵山区坡地资源的更新措施。

The slope-land resources are importantly basic ones of agriculture in hilly area,but it lost and degenerated heavily due to the influence of both natural and human factors. According to the abilities of protecting ecological environment and dynamic changes of productive forces caned by turning slope-land into terraced land,this paper put forward a measure of renewing slope-land resources in hilly area.