柬埔寨耕地复种指数时空格局分析研究

Spatial-temporal Pattern of Farmland Multiple Cropping Index in Cambodia

利用柬埔寨2010—2012年农业统计年鉴数据提取各个省级行政单元3年的平均复种指数,结果显示:海拔不高于50m的区域面积占所在省份土地总面积的比例与年度耕地复种指数之间的相关性为0.751,达到极显著相关关系;雨季时的农作物播种面积平均占全年的87.1%.研究表明:柬埔寨农业开发在很大程度上受地形限制,主要分布在海拔较低、地势平坦的洞里萨湖区、洞里萨河两岸和湄公河在其境内的后半段.此外,柬埔寨的农业开发受气候条件制约严重,农作物种植和生长主要集中在雨季,耕地复种指数具有明显的季节性差异.

The agricultural statistical data of Cambodia from 2010 to 2012 was used to extract the average multiple cropping index of each provincial administrative unit in three years. The results indicated that the agriculture development in Cambodia was restricted by terrain geography, which was distributed in Tonle Sab Lake district, Tonle Sab River coast and the latter part of Mekong River in Cambodia. There was an obviously significant correlation between farmland multiple cropping index and the ratio of the areas where were no higher than 50 meter above sea level by the total land areas in each province, and the correlation coefficient was 0. 751. The crop planting areas in rainy season occupied 87. 1 percent of the total areas. In addition, the agriculture development was seriously restricted by climatic conditions. The planting and growth of crops mainly occured in rainy season. The farmland multiple cropping index had clear seasonal differences between rainy and dry seasons in Cambodia.