不同施氮水平對山東褐土煙田供氮狀況及烤煙質(zhì)量的影響

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

摘要: 通過田間試驗,，在臨沂煙區(qū)褐土煙田中，設(shè)置了不施氮肥（N0）,、施氮82.5 kg/hm²（N1）和施氮105 kg/hm²（N2）3個處理,，研究不同施氮水平對植煙土壤供氮狀況及烤煙質(zhì)量的影響。結(jié)果表明,，隨著施氮水平的增加,，土壤中的硝態(tài)氮和銨態(tài)氮相應(yīng)升高，煙株的干物質(zhì)積累量相應(yīng)增加,。在煙株的整個生育期內(nèi),，煙株的含氮量呈下降趨勢，隨施氮水平的增加,，下降趨勢漸緩,。上部葉煙堿隨施氮水平增加而增加，中部葉和下部葉中的煙堿則下降,。

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.