不同施氮量对烟草生长及产量的影响

Effects of Different Nitrogen Application Rate on the Growth and Yield of Tobacco

为探明不同施氮量对烟草云烟87生长发育、产量及经济效益的影响,为贵州省黔东南州烟草种植区烟草氮肥的合理施用提供科学依据。采用田间小区试验,设置CK、M、N0、N1、N2和N3这6个施肥处理,调查各处理烟草生育期内烟株主要的农艺性状、病害发生情况、烘烤后烟叶的经济性状和各处理烟叶产量。结果表明:与其他施肥处理相比,N2处理烟草大田长势好,农艺性状好,抗病能力强,可相对提高产量和经济效益。在贵州省黔东南州烟区烟草最佳施氮量为120 kg/hm2,建议在黔东南州烟区推广应用,同时可为相近地区烟草施肥提供参考。

In order to explore the effects of different nitrogen application rates on the growth,yield and economic benefits of tobacco Yunyan 87,and to provide scientific basis for rational application of nitrogen fertilizer in tobacco growing areas of the southeast Guizhou state,field plot experiments were conducted to investigate the growth period of tobacco treated with CK,M,N0,N1,N2 and N3 fertilizer treatments.The main agronomic traits of tobacco plants,occurrence of diseases,economic traits of tobacco leaves after curing and yield of tobacco leaves under different treatments were studied.The results showed that compared with other fertilization treatments,N2 treatment had better field growth,better agronomic traits and disease resistance,and could increase yield and economic benefits.The optimum nitrogen application rate of tobacco in the southeast Guizhou state is 120 kg/hm2.It is suggested that the application of nitrogen in tobacco areas of the southeast Guizhou state should be popularized,and it can provide reference for tobacco fertilization in similar areas.