中国农田表土有机碳含量变化探讨——基于中文期刊网论文资料的统计分析

发布时间：2018-11-04 20:30

【摘要】：检索获取了中国期刊网收录的1980—2009年间土壤研究文献,提取了其中研究样品的有机质含量信息并形成数据库,统计评价了我国农田表土有机碳含量变化情况。结果表明:1985年以前文献土壤样品有机碳含量平均为(12.88±7.86)g·kg-1,1985—1992年则为(11.26±6.30)g·kg-1,1993—2002年为(11.67±5.11)g·kg-1,而2003—2009年为(11.72±7.15)g·kg-1;显示,1985年以来农田表土有机碳含量呈现总体上升趋势,支持了我们对土壤监测资料的分析结果。土地利用方式显著影响土壤样品的有机碳含量水平,水田总是高于旱地(P0.05),不随时间变化而改变;旱地土壤样品的有机碳含量以1985年前为最高,而水田样品2003—2009年期间含量高于1985年前水平。同时分析表明,旱地农田表土有机碳含量区域差异明显,近30年来,旱地农田表土有机碳含量在华北、华东、西北增加显著(P0.05);而在东北显著降低(P0.05);华南、西南有机碳含量变化不明显(P0.05)。这些结果支持了已有的土壤监测资料和调查资料研究中中国土壤固碳趋势及其地理区域分异的认识。
[Abstract]:The soil research literature collected from 1980 to 2009 was retrieved and the information of organic matter content of the research samples was extracted and a database was formed. The change of organic carbon content in farmland topsoil in China was evaluated statistically. The results showed that the average content of organic carbon in soil samples before 1985 was (12.88 卤7.86) g / kg-1,1985-1992 and (11.26 卤6.30) g / kg-1,1993-2002 / year was (11.67 卤5.11) g / kg-1, respectively. Compared with (11.72 卤7.15) g kg-1; in 2003-2009 The results show that the organic carbon content of farmland surface soil has been increasing since 1985, which supports our analysis of soil monitoring data. The level of organic carbon in soil samples was significantly affected by land use patterns, and paddy fields were always higher than those in drylands (P0.05), which did not change with time. The organic carbon content of dryland soil samples was the highest before 1985, while the content of paddy field samples from 2003 to 2009 was higher than that before 1985. The results showed that the organic carbon content of surface soil increased significantly in North China, East China and Northwest China (P0.05), but decreased significantly in Northeast China (P0.05). There was no significant change in organic carbon content in South China and Southwest China (P0.05). These results support the understanding of soil carbon sequestration trends and geographic regional differentiation in China based on the available soil monitoring data and investigation data.
【作者单位】：南京农业大学农业资源与生态环境研究所;内蒙古民族大学农学院;
【基金】：财政部CDM基金“中国农业农村温室气体减排潜力评估研究”(0810010)
【分类号】：S153.6

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