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以河南省目前种植面积较大的中烟100为试验材料,研究氮肥不同施用措施对烟叶产量、含氮化合物及氮肥利用效率的影响。结果表明,与不施氮处理相比,施氮显著提高了烟叶产量、产值和含氮化合物含量,烟叶产量和产值分别增加10.0%～56.7%、11.6%～43.1%。在相同施氮量条件下,随着追施氮比例增加,烟叶产量和含氮化合物、氮肥利用效率增加,烟叶产值在施氮37.5 kg/hm2水平随着氮肥追施比例增加而增加,而在施氮60kg/hm2和82.5 kg/hm2水平均以氮基施75%、追施25%处理最高。在氮基追比例相同条件下,烟叶产量和含氮化合物及氮肥贡献率随着施氮量增加而增加,氮肥偏生产力随着施氮量增加而降低,氮肥吸收利用率和烟叶产值均以N 60 kg/hm2处理最高。从烟叶产量和含氮化合物适宜,提高烟叶产值和氮肥利用率方面综合分析,在本试验中,以施氮60.0 kg/hm2,氮50%～75%基施、25%～50%追施处理表现最优。
In this paper, the current planting area of Zhongyan 100 in Henan Province was used as the experimental material to study the effects of different application measures of nitrogen fertilizer on the yield, nitrogenous compounds and nitrogen use efficiency of tobacco leaves. The results showed that nitrogen application significantly increased the yield, yield and nitrogenous compounds content of tobacco leaves. The yield and value of tobacco increased 10.0% -56.7% and 11.6% -43.1%, respectively. Under the same nitrogen application rate, with the increase of topdressing nitrogen ratio, the yield of tobacco leaves and nitrogenous fertilizer and nitrogen use efficiency increased, while the output value of tobacco increased at the nitrogen application rate of 37.5 kg / hm2, Nitrogen application rates of 60 kg / hm2 and 82.5 kg / hm2 were highest with 75% nitrogen and 25% topdressing. Under the same condition of nitrogen recovery rate, the yield of tobacco leaves and the contribution of nitrogenous compounds and nitrogen fertilizer increased with the increase of nitrogen application rate. The partial productivity of nitrogen fertilizer decreased with the increase of nitrogen application rate. The nitrogen use efficiency and yield of tobacco were N 60 kg / hm2 highest treatment. Based on the comprehensive analysis of tobacco yield and nitrogenous compounds, and the improvement of tobacco production and nitrogen use efficiency, the basal application of 60.0 kg / hm2 nitrogen, 50% -75% nitrogen and 25% ~ 50% Best performance.