To improve the quality of tobacco and the utilization ratio of fertilizer, an experiment was conducted to study the effects of bio-organic-inorganic compound fertilizer on soil and nitrogen content of flue-cured tobacco. The results indicated that after adding chicken manure and bio-organic-inorganic compound fertilizer made from oil cake into the soil,the content change trends of ammonium nitrogen and nitrate nitrogen in treated soil featured by first increasing and then decreasing. Compared with the control, the highest content of ammonium nitrogen and nitrate nitrogen in soil appeared 28 d later; The dry matter accumulation increased by 15. 8~36. 4 g and the nutrient utilization rates of N increased by 1. 35% ~ 4. 5% ; The allocation proportion of nitrogen in tobacco leaves increased by 0. 71% ~4. 78%(the allocation proportion of nitrogen in middle leaves increased by 13. 06%~14. 79%,which was the highest), The nitrogen allocation proportions in root and stem decreased by 0. 39% ~ 2. 2%, 0. 31% ~ 2. 58% respectively.%为了提高烟叶品质和肥料利用率,进行了生物有机无机复混肥对土壤和烤烟氮素营养的影响试验.结果表明:土壤中加入鸡粪和油枯制作的不同养分的生物有机无机复混肥,各处理土壤中铵态氮、硝态氮含量变化趋势表现为先升高后降低,土壤中铵态氮、硝态氮含量最高峰值比对照延后28d；烤烟干物质积累量提高15.8～36.4g,对氮肥的利用率提高1.35～4.5百分点；氮在烟叶中的分配比例提高0.71～4.78百分点(分配比例以中部烟叶最高,提高13.06～14.79百分点),根系和茎秆中的氮分配比例分别降低0.39～2.2百分点和0.31～2.58百分点.
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