基于“土类—土地利用类型”权重法的白城地区近50年土壤有机碳动态变化研究
hange of Land Soil Organic Carbon in Baicheng District of Western Jilin during the last 50 years using the method of
本研究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1950s到2000s近50年来土壤有机碳密度（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均随时间持续降低；但不同时期泥炭土SOD均为最高，盐碱土均为最低。②近50年来，白城地区的SOD从92.22±21.13t/hm2减少至68.01±10.76 t/hm2，减少约28.25%，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6.2×107t，各县市SOC呈逐年降低态势，且表现为洮南市＞镇赉县＞通榆县＞大安市＞洮北区的变化规律。该区正在进行的土地整理工作将借引嫩等水利工程扩大水田面积，以达到改良盐碱土地、提高土壤有机碳储量的目的。
aking 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 (1950s ~2000s). 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±21.13t/hm2 in 1950s to 68.01±10.76 t/hm2 in 2000s) which dropped from north to south, from west to east. ③SOC has descended 6.2×107t 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.
许鑫、毛子龙、汤洁、李昭阳、李娜
农业科学研究环境科学基础理论环境污染、环境污染防治
土壤评价白城地区土壤有机碳密度（SOD）土壤有机碳储量（SOC）GIS
Soil AssessmentBaicheng DistrictSoil Organic Carbon Density (SOD)Soil Organic Carbon Storage (SOC)GIS
许鑫,毛子龙,汤洁,李昭阳,李娜.基于“土类—土地利用类型”权重法的白城地区近50年土壤有机碳动态变化研究[EB/OL].(2010-11-24)[2025-06-19].http://www.paper.edu.cn/releasepaper/content/201011-552.点此复制
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