作　　者： ; ; ; ; ; ;

机构地区： 吉林大学环境与资源学院

出　　处： 《生态环境学报》 2011年第5期865-868,共4页

摘　　要： 基于白城地区第一次、第二次全国土壤普查和野外现场采样共217个土壤剖面数据,利用"土类-土地利用类型"权重方法,估算白城地区11个土类从20世纪50年代至2009年近50年的土壤有机碳密度(SOD)和碳储量(SOC),分析SOD变化规律,探讨其时空演化特征,结果表明,①近50年来,除水稻土和栗钙土SOD随时间增加外,其余各土类SOD随时间持续降低;但不同时期泥炭土SOD均最高,盐碱土均为最低。②近50年来,白城地区的SOD从92.22±21.13 t.hm-2减少至68.01±10.76 t.hm-2;表现为自北向南、自西向东降低的空间分布规律。③近50年来,白城地区SOC减少了6.2×107 t,各县市SOC呈逐年降低态。 Taking Baicheng district, western Jilin as a case, change of soil organic carbon density （SOD） and soil organic carbon storage （SOC） of 11 soil types in this area is estimated and analyzed in the last 50 years （1950 s -2000 s）. By referencing the data and sampling location of 193 soil profiles in the first and second national soil surveys in Baicheng district, additional 24 soil profiles were sampled in the county in 2009. By calculating the SOD of 11 soil types, certain phenomenon can be listed as follows. ①SOD in paddy soil and chestnut soil has ascended in the last 50 years while others has descended. The top and lowest SOD are retained which are peat soil and saline-alkali soil. ②SOD in this district has descended 28.25% （from 92.22±21.13 t·hm^-2 in 1950s to 68.01±10.76 t·hm^-2 in 2000 s） which dropped from north to south, from west to east. ③SOC has descended 6.2×10^7t in the last 50 years while ones in each county were steady declining. The rank of SOC in each county is Taonan〉Zhenlai〉Tongyu〉Da＇an〉Taobei. Building irrigation works and expanding area of paddy field should be taken to stabilize and increase SOD in this area.

关 键 词： 土壤评价 白城地区 土壤有机碳密度 土壤有机碳储量

领　　域： [农业科学] [农业科学]