Abstract:Because of the oversupply of nitrogen in high-fertility soil, the flue-cured tobacco couldn‘t mature promptly which caused the decrease of quality of flue-cured tobacco. The effects of different interplanting patterns on nitrogen absorption for flue-cured tobacco were studied in this paper. The forage, cabbage or potato were selected to interplant with tobacco to reduce the nitrogen absorption of tobacco because the competitive relationship among different crops. The inter plant crops decreased the supply of nitrogen to tobacco at later stage and stimulated the leaf‘s maturity. At four stages of tabacco, which were budding, lower leaf maturity, middle leaf maturity and upper leaf maturity stage separately, NO3--N content was lower in the selected patterns[tobacco interplanting with forage, cabbage and potato (1.15mg/kg-3.47 mg/kg) than that of no interplanting. However, NO3--N content of tobacco-vegetable bean pattern (2.29 mg/kg-4.32 mg/kg) is higher than that of tobacco interplanting with vegetable bean] than that of no interplanting. The effects of different interplanting patterns on NH4+-N were similar to that of NO3--N. The effects of interplanting on organic matter was not significant at the four stages; however the content of Ca,Mg,K,P,S,B, Cu,Fe,Mn and Zn decreased to varying ranges. In addition, interplanting decreased soil water content by 3.24%-7.35% .The effect of interplanting on yield of tobacco was not significant, but extremely significant on its output. Interplanting with cabbage, potato and forage, the yield of tobacco increased 33.20% , 13.73% and 32.32% , respectively, while interplanting with vegetable bean, the yield decreased 11.86 % . We concluded that interplanting patterns except interplanting with vegetable bean could balance chemical compositions in tobacco and enhance evaluating scores of tobacco leaf.