| 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 |
| |
| 引用本文： | 邰继承,闫明,程琨,潘根兴.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[J].农业环境保护,2011(9):1816-1821. |
| |
| 作者姓名： | 邰继承 闫明 程琨 潘根兴 |
| |
| 作者单位： | [1]南京农业大学农业资源与生态环境研究所,南京210095 [2]内蒙古民族大学农学院,内蒙古通辽028042 |
| |
| 基金项目： | 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） |
| |
| 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（P〈0．05），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（P〈0．05）；而在东北显著降低（P〈0．05）；华南、西南有机碳含量变化不明显（P〉0．05）。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。
|
| 关 键 词： | 农田土壤 土壤有机碳 土地利用 文献研究 |
Change in Topsoil Organic Carbon Changes of China＇s Cropland：A Statistical Analysis of Sample Data in Chinese Literature from Available on CNCK Network |
| |
| TAI Ji-cheng,YAN Ming,CHENG Kun,PAN Gen-xing.Change in Topsoil Organic Carbon Changes of China＇s Cropland：A Statistical Analysis of Sample Data in Chinese Literature from Available on CNCK Network[J].Agro-Environmental Protection,2011(9):1816-1821. |
| |
| Authors: | TAI Ji-cheng YAN Ming CHENG Kun PAN Gen-xing |
| |
| Institution: | 1.Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095,China; 2.College of Agriculture, Inner Mongolia University for Nationalities, Tongliao 028042, China) |
| |
| Abstract: | In this study, data of SOC of the research samples were retrieved to form a database of cropland soil sample SOC dynamics from Chinese literature from CNCK journal network available during 1980 to 2009. Change in topsoil soil organic carbon（ SOC ） was analyzed under different land use types and in different sampling decades. While the SOC content on average was（ 12.88±7.86 ） g· kg^-1 for croplands sampled before 1985, it decreased to（11.26±6.30） g· kg^-1during 1985-1992 and increased slightly thereafter to（ 11.67±5.11 ） g· kg^-1 sampled during 1993-2002 and increased significantly to （11.72±7.15 ） g· kg^-1 during 2003-2009. Thus, an overall increasing trend of cropland topsoil SOC content was evidenced, supporting our previous study on soil monitoring data. Land use type had very remarkable impact on cropland SOC content as rice paddies had significantly higher SOC content than dry croplands, being regardless of sampling duration. The SOC contents of dry croplands were highest before 1985 while that of rice paddies peaked during 2003-2009.There existed much difference in mean SOC contents of drylands between the geographical regions of China, as SOC contents of croplands were found significantly increased from North, East and Northwest China for last 30 years （P〈0.05） but decreased from Northeast China （P〈0.05） and almost unchanged from Southwest China. These findings could further support the general increase in SOC in China＇s croplands, which varied with geographical conditions. |
| |
| Keywords: | China cropland soil organic carbon land use literature research |
| 本文献已被 维普 等数据库收录！ |
