黑龙江省大庆地区植被和土壤碳氮储量的最新估算

利用1978年MSS多光谱数据、2008年中国资源卫星数据和野外实验数据,对黑龙江省土壤退化典型地区大庆地区的植被和土壤碳氮储量进行了估算。结果表明:大庆地区的植被平均碳密度1978年为0.58 kgm-2,2008年为0.67 kgm-2;土壤平均碳氮密度分别为(8.18±1.65)kgm-3和(0.37±0.11)kgm-3,土地覆被平均土壤碳氮密度分别为(7.53±2.16)kgm-3和(0.33±0.16)kgm-3。1978和2008年植被碳储量分别为9.38×106 t和1.04×107 t,30年期间植被碳储量增加了1.02×106 t;全区土壤总碳量为(1.65±0.33)×108 t,总氮量为(7.55±2.15)×106 t;全区土地覆被土壤总碳量为(1.52±0.44)×108 t,总氮量为(6.74±3.32)×106t。大庆地区的植被和土壤平均碳密度都低于中国的平均水平,应加强土地保护,防止土壤的进一步退化。

New Estimating Vegetation and Soil Carbon/Nitrogen Storage in Daqing Region,Heilongjiang

Using the MSS Multi-spectral data in 1978,Chinese Resources Satellite Data in 2008 and field soil experiment data in 2009,the vegetation and soil carbon/nitrogen storages were estimated in Daqing-typical soil degradation region in Heilongjiang.The results showed that the average vegetation carbon densities were 0.58 kg m-2 in 1978 and 0.67 kg m-2 in 2008,respectively in Daqing.The average soil carbon and nitrogen densities were(8.18±1.65) kg m-3 and(0.37±0.11) kg m-3,average land cover soil carbon and nitrogen densities were(7.53±2.16) kg m-3 and(0.33±0.16) kg m-3,respectively.Vegetation carbon storage were 9.38×106 t in 1978 and 10.40×106 t in 2008 respectively,vegetation carbon storage increased 1.02×106 t in the past 30 years.Total soil carbon and nitrogen were(165.28±33.30)×106 t and(75.52±21.48)×105 t,total land cover soil carbon and nitrogen were(152.19±43.74)×106 t and(67.44±33.23)×105 t,respectively.Daqing's average vegetation and soil carbon densities were lower than China's average levels,land protection should be strengthened to prevent further soil degradation in Daqing.