不同施氮水平对山东褐土烟田供氮状况及烤烟质量的影响

Effects of Nitrogen Rates on Brown Soil Nitrogen Status of Tobacco Fields and Tobacco Quality in Shandong

摘要: 通过田间试验，在临沂烟区褐土烟田中，设置了不施氮肥（N0）、施氮82.5 kg/hm²（N1）和施氮105 kg/hm²（N2）3个处理，研究不同施氮水平对植烟土壤供氮状况及烤烟质量的影响。结果表明，随着施氮水平的增加，土壤中的硝态氮和铵态氮相应升高，烟株的干物质积累量相应增加。在烟株的整个生育期内，烟株的含氮量呈下降趋势，随施氮水平的增加，下降趋势渐缓。上部叶烟碱随施氮水平增加而增加，中部叶和下部叶中的烟碱则下降。

Abstract: The effect of different nitrogen rates on soil nitrogen status for planting tobacco and quality of flue-cured tobacco were studied. The experiment were carried out in a very fertile field of Linyi tobacco growing areas with three nitrogen rate, including non-nitrogen (N0), 82.5 kg/ha (N1) and 105 kg/ha (N2). The results showed that the soil NO3ˉ- N and NH4+- N contents and dry matter accumulation in tobacco plants were enhanced with the increase of nitrogen rates. In the whole growing stage of tobacco, the nitrogen content of tobacco plants declined, and the downward trend appeared slowly with the increase of nitrogen rates. The upper leaves exhibited increased nicotine content with the increase of nitrogen rates, while the middle and lower leaves appeared the opposite.