The nitrogen deposition experiments on Cinnamomum camphora plantation of Hunan provincial botanical garden were simulated from June the 7th to October the 7th,2010,the nitrogen deposition levels was respectively as control(CK, 0 g·m~(-2) a~(-1)),low nitrogen(LN,5 g·m~(-2) a~(-1)),medium nitrogen(MN,15 g·m~(-2) a~(-1)) and high nitrogen(HN, 30 g·m ~(-2) a~(-1)).The soil respiration speed and soil surface temperature and the surface water content of the soil were determined by LI-8100 measuring instrument.The results show that the average values of soil respiration speed were CK (4.09±0.66μmol·m~(-2) s~(-1)),LN(2.39±029μmol·m~(-2) s~(-1)), MN(2.18±0.19μmol·m~(-2)s~(-1)),HN (2.28±0.25μmol·m~(-2) s~(-1)),and the treatment of the CK was obviously higher than the other three treatments(P<0.01).With different nitrogen concentrations deposition treatments,the Q_(10) (temperature sensitivity coefficients) for soil respiration of CK,LN,MN and HN treatments were 1.84,1.71,1.83 and 1.56.It was positive correlation between the respiration speed and the surface(≤10 cm) temperature of tested soil.It was negative correlation between the respiration speed and the surface(≤5 cm) water content of tested soil(P>0.05).Volumetric water content of 5-cm soil was between 0.266 6-0.294 4(m~3·m~(-3)), and the monthly content did not vary too much during the research period(1.8%-9.4%).The findings suggest that the initial stage of nitrogen deposition obviously influenced the soil respiration of C.camphora plantation. The nitrogen deposition experiments on Cinnamomum camphora plantation of Hunan provincial botanical gardens were simulated from June the 7th to October the 7th, 2010, the nitrogen deposition levels were as as CK (0 g · m -2 a - 1), low nitrogen (LN, 5 g · m -2 a -1), medium nitrogen (MN, 15 g · m -2 a -1) and high nitrogen (HN, 30 g · m -2 a -1) .The soil respiration speed and soil surface temperature and the surface water content of the soil were determined by LI-8100 measuring instrument.The results show that the average values ​​of soil respiration speed were CK (4.09 ± 0.66μmol · m -2 s -1), LN (2.39 ± 029μmol · m -2 s -1), MN 2.18 ± 0.19μmol · m -2 s -1, HN 2.28 ± 0.25μmol m -2 s -1, and the treatment of the CK was obviously higher than that the other three treatments (P <0.01) .With different nitrogen concentrations deposition treatments, the Q_ (10) (temperature sensitivity coefficients) for soil respiration of CK, LN, MN and HN treatments were 1.84, 1.71, 1.83 and It was positive correlation between the respiration speed and the surface (≤10 cm) temperature of tested soil. It was negative correlation between the respiration speed and the surface (≤5 cm) water content of tested soil (P> 0.05). Volumetric water content of 5-cm soil was between 0.266 6-0.294 4 (m -3 m -3), and the monthly content did not vary too much during the research period (1.8% -9.4%). The findings suggest that the initial stage of nitrogen deposition obviously influenced the soil respiration of C. camphora plantation.