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酸性土壤施适量石灰，有利于改善烟株根系生长的环境条件，促进烟株生长，增强烟株的抗病力，提高烟叶叶绿素含量和光合速率，有利于烟叶干物质积累，提高烟叶产质量．在土壤pH值为5．2的土壤中，大田每公顷施石灰750kg最适宜，上中等烟比例提高12．1个百分点，均价比对照提高0．77元·kg－1，每公顷产值增加2498．55元．
Applying lime in acidic soil is beneficial to improving the environmental conditions of tobacco root growth, promoting the growth of tobacco plants, enhancing the disease resistance of tobacco plants, increasing the chlorophyll content and photosynthetic rate of tobacco leaves, and facilitating the accumulation of dry matter of tobacco leaves and improving the quality of tobacco leaves. In soil with soil pH value of 5.2, 750kg of lime per hectare was the most suitable in the field and 12.1% of the upper middle-grade tobacco with an average price of 0.77 yuan · kg-1 higher than that of the control, with an increase in output per hectare 2498.55 yuan.