1978年以来广西耕地数量变化及其驱动因子分析

利用广西历年统计资料分析了1978—2005年广西耕地变化过程,耕地总量波动递减,人均耕地明显持续下降.耕地减少构成主要是建设占用耕地、农业结构调整占用耕地、生态退耕、灾毁以及其它;人均耕地面积逐年减少;个别年份耕地面积减少幅度很大;水田面积逐年减少,旱地面积逐年增加并趋于稳定,两者在耕地面积中所占的比例发生较大变化;农作物总播种面积呈上升态势,粮食作物播种面积总体上呈下降趋势,年际间有起伏.并分析了耕地变化的驱动因子,最后提出了耕地保护的措施建议.

An Analysis of Dynamic Change and Driving Forces of Cultivated Land in Guangxi since 1978

We analyzed the dynamic change process of cultivated land from 1978 to 2005 in Guangxi using the Guangxi statistical data of all previous years.The total area of cultivated land undulates and decreases progressively,the per capita area of cultivated land decreases obviously and continuously.The reduction of cultivated land includes the construction taking the farmland,the agricultural structure adjustment,the ecology,and the disaster destroys the farmland and others;The per capita cultivated area reduces year by year;The reduction scope of cultivated area of individual year is very large;The paddy field area reduces year by year while the arid land area increases year by year and tends to stabilize;The total sown area of crops assumes the rise trend overall whereas the sown area of grain crops assumes the drop tendency,which has the fluctuation near the year border.we also analyzed the driving forces of the farmland change,finally put forward the measure and proposal of farmland protection.