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(一)早春烟—稻—稻耕作制的提出及其效果大埔县地处粤东,毗邻福建,是一个地形地貌复杂的山区县,在气候划分上,属于中亚热带向南亚热带过渡性地区,年有效积温(大于12℃)3000—3200℃,年降雨量约1440毫米,受海洋性气候影响为主。在我县地理环境的限制下,其所形成的基本格局是“八山一水半亩地”。尽管我县历史上在村区、半村区实行稻—稻—麦、稻—薯—麦、稻—稻—冬烟,在高海拔地区提高粮食作物的复种指数,以增加粮食总产。但粮食问题,仍未得到解决,
(I) Early spring tobacco-rice-rice farming system put forward and its effect Dapu County is located in eastern Guangdong Province, adjacent to Fujian, is a mountainous terrain complex, in the division of climate, belonging to the sub-tropical transition to the subtropical region , The annual effective accumulated temperature (greater than 12 ℃) 3000-3200 ℃, the annual rainfall of about 1440 mm, mainly due to the impact of maritime climate. Under the limitation of the geographical environment in our county, the basic pattern formed by it is “Ba Shan water and a half mu of land.” Although the county has historically implemented paddy-rice-wheat, rice-potato-wheat, rice-rice-winter tobacco in the village and semi-village areas, it will increase the multiple cropping index of grain crops at high altitude to increase the total grain output. However, the food issue has not been solved yet.