施氮量对香料烟干物质积累及氮利用率的影响

以香料烟品种云香巴斯马一号为材料,研究了不同氮肥用量对香料烟干物质积累量、积累强度、产量、产值及氮素利用率的影响.结果表明:随施氮量的增加,香料烟各器官中干物质积累量呈增加的趋势；干物质积累强度均表现为先上升后下降的趋势；各器官干物质在生长期间分配规律一致；产量、产值呈逐渐上升的趋势,增产率为80.43％～140.23％,增值率为66.90％～116.20％；氮素收获指数呈上升趋势；氮肥农艺利用率、氮肥表观利用率、氮肥生理利用率呈先上升后下降的趋势；氮肥偏生产力、土壤氮素依存率呈下降的趋势.

Effects of different nitrogen on dry matter accumulation and nitrogen use efficiency of oriental tobacco

The effect of amount nitrogen-fertilizer applied on accumulation of dry matter,intensity of accumulation,root shoot ratio,yield,economic characters and nitrogen use efficiency inoriental tobacco was studied.The results indicated that the accumulation of dry matter of organs and dry weight of the whole plant was increased with the quantity of inorganic nitrogen fertilizer being added;Intensity of accumulation were raised first and then dropped down.The distributions of dry matter of organs were crepancy thro...