[目的]为了明确烤烟的营养特性和土壤养分供应特性.[方法]选用当前种植较广的云烟85、云烟87、K326为供试材料,对烤烟大田生长期对氮、磷、钾的吸收利用及土壤氮磷钾供应进行研究.[结果]不同品种氮、磷、钾吸收的主要吸收时期最大吸收出现的时间存在明显差异,烤烟氮、磷、钾累积总量也因品种不同而异；烤烟大田生长期氮磷钾吸收曲线与土壤速效氮、磷、钾供应曲线均呈低-高-低变化,但是烤烟氮磷钾吸收主要集中在移栽后50～90 d,土壤速效养分供应则主要集中移栽后20 ～50 d,早于烤烟吸收.[结论]在实际生产中,应根据不同品种烤烟的营养特性确定不同的施肥量、施肥时间,以满足烤烟对养分的需求.%[Objective]The research aimed to make clear the nutrient of different varieties of tobacco and nutrient supply of soil. [ Method] Absorption and utilization of nitrogen, phosphorus and potassium in three tobacco varieties (YUNYAN85, YUNYAN87, K326) cultured extensively and nutrient supply of nitrogen, phosphorus and potassium in the soil were studied. [Result] The main period of nitrogen, phosphorus and potassium accumulation and the time of absorbing peak reached were different in three tobacco varieties. The total accumulation of nitrogen , phosphorus and potassium at harvesting period were also varied with varieties. The nutrient uptake curve of tobacco and supply curve of soil both showed the low-high-low tendency after transplant. But nutrient absorption of tobacco was mainly concentrated in 50 - 90 days after transplant. However, supply of available nutrient in soil was mainly concentrated in 20 - 50 days after transplant which was earlier than that of tobacco absorption. [ Conclusion] Determining fertilizer rate and time should be based on the nutrient of different varieties of tobacco in practical production.
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