2004年宁远县烤烟—水稻—蔬菜高效种植模式已推广 3 300hm2。这种模式是在双季稻改烟—稻的基础上增加了一季蔬菜。烟—稻模式属水旱轮作,有利于改善土壤结构,提高土壤肥力,减轻病虫害,能实现粮、经双丰收,一般比稻—稻模式可增加收入 1 2万~1 5万元 /hm2。在烟—稻模式基 In 2004 Ningyuan County flue-cured tobacco - rice - vegetable efficient planting mode has been promoted 3 300hm2. This model is in the double crop of rice to change the smoke - an increase of one season of vegetables on the basis of rice. The tobacco-rice model belongs to the rotation and hydroponics. It helps to improve the soil structure, improve the soil fertility, reduce the pests and diseases, and can achieve the dual harvest of grain. Generally, it can increase the income by 12,000 ~ 15,000 yuan / hm2 over the rice-rice model. In the smoke - rice model base