Effect of Planting Tobacco under Long-term Fertilizer Application Systems on Soil Properties

A potted tobacco experiment under different long- term fertilizer application systems on soil properties was conducted. The results showed that the soil became hard and bad for the growth of tobacco root with non- fertilizer or chemical fertilizer only, while the soil with organic fertilizer or combined application of organic and inorganic fertilizer helped the growth of tobacco plant. Especially, for the combined application of organic and inorganic fertilizer application, the upper leaf- opening was entire, and the ratio of upper to middle and to lower leaf was suitable, and the enzymes activity in leaf was high. In the tobacco plant, the range of the N, P, and K content in underground part was NK2OP2O5, while K2ONP2O5 in above groud part. The range of N, P, and K content in different organs was leafstalkroot. The range of N and P content in leaf was middleupperlower, while the K content was middlelowerupper. The P and K uptake amount followed the order: MNPKMNPKCK, while the N uptake amount followed the order: MNPKNPKMCK.