【摘要】 在施用相同磷钾肥基础上,设5个氮肥施用量的田间试验,各处理在不同生育期采集有代表性烟株3～10株分根、茎、叶测定养分含量。结果表明,增施氮肥,烤烟增产39.54%～94.76%,每千克N增产烟叶4.8～13.9 kg,氮肥施用量与烤烟生物产量的相关方程为:Y=1580.9+22.106X-0.0932X2。烤烟吸收的氮、磷、钾、钙、镁、硫分别提高49.1%～176.3%、20.8%～40.7%、45.0%～96.0%、17.4%～70.3%、11.9%～68.8%、30.9%～57.1%;增加吸收的各养分大多累积在烟叶中。每生产100kg烟叶需要吸收N 3.08～5.53 kg,N∶P2O5∶K2O∶Ca∶Mg∶S=1∶0.40∶1.37∶1.44∶0.10∶0.27;对氮、磷、钾的吸收高峰均是在团棵至旺长期之间,过高的施氮量对磷吸收强度的提高有一定的抑制作用;増施45～90kg N,烟叶的含氮量、烟碱和蛋白质含量随施氮量增加而提高,而糖/碱比、施木克值随施氮量增加而降低,但过高的N肥施用量亦会抑制这种提高或降低的趋势。每公顷施用90kg N的烟叶化学品质较接近优质烟叶的化学品质指标。生产上适宜的氮肥推荐施用量为63.0～84.0 kg/hm2。更多还原

【Abstract】 Five levels of nitrogen fertilizer were set based on the same level of potassium and phosphorus fertilizer in order to determine nutrient content of representative 3-10 flue-cured tobacco plants in different growing stages.The results showed that the yield was increased by 39.54 %-94.76 % with the increasing of nitrogen applied rates.1 kg nitrogen could increase flue-cured tobacco yield of 4.8-13.9 kg.The relative equation between flue-cured tobacco biomass(Y) and N applied rates(X) was Y=1580.9+22.106X-0.0932X2.The absorption of nutrient all increased with the increasing of N applied rates,and increase ratios were N 49.1 %-176.3 %,P2O5 20.8 %-40.7 %,K2O 45.0 %-96.0 %,Ca 17.4 %-70.3 %,Mg 11.9 %-68.8 %,S 30.9 %-57.1 %.The increase of nutrient mainly cumulated in leaves.100 kg flue-cured tobacco was produced,it need to absorb of nutrient N 3.08-5.53 kg,N∶P2O5∶K2O∶Ca∶Mg∶S=1∶0.40∶1.37∶1.44∶0.10∶0.27.Nitrogen,nicotine and protein content in tobacco leaves were increased with the increasing of N applied rates in the range of 45-90 kg/hm2,while the sugar/alkali ratio and Schmuck’s value decreased.But the high level of N controlled this kinds of increasing or decreasing trends.The application of 90 N kg/hm2 could obtained high-quality tobacco leaf.The suitable N recommended rates for production were 63.0-84.0 kg/hm2.更多还原