Environmental and Anthropogenic Factors Driving Changes in Paddy Soil Organic Matter: A Case Study in the Middle and Lower Yangtze River Plain of China

GUO Naijia; SHI Xuezheng; ZHAO Yongcun; XU Shengxiang; WANG Meiyan; ZHANG Ganlin; WU Jinshui; HUANG Biao; KONG Chao

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Environmental and Anthropogenic Factors Driving Changes in Paddy Soil Organic Matter: A Case Study in the Middle and Lower Yangtze River Plain of China

机译：导致稻田土壤有机质变化的环境和人为因素-以长江中下游平原地区为例

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Changes in soil organic matter (SOM) can affect food security,soil and water conservation,and climate change.However,the drivers of changes in SOM in paddy soils of China are not fully understood because the effects of agricultural management and environmental factors are studied separately.Soil,climate,terrain,and agricultural management data from 6 counties selected based on representative soil types and cropping systems in China were used in correlation analysis,analysis of variance,and cforest modeling to analyze the drivers of changes in SOM in paddy soils in the Middle and Lower Yangtze River Plain from 1980 to 2011.The aims of this study were to identify the main factors driving the changes in SOM and to quantitatively evaluate their individual impacts.Results showed that the paddy SOM stock in the study area increased by 12.5％ at an average rate of 0.023 kg m-2 year-1 over the 31-year study period.As a result of long-term rice planting,agricultural management practices had a greater influence than soil properties,climate,and terrain.Among the major drivers,straw incorporation,the most influential driver,together with fertilization and tillage practices,significantly increased the accumulation of SOM,while an increase in temperature significantly influenced SOM decomposition.Therefore,to confront the challenge of rising temperatures,it is important to strengthen the positive effects of agricultural management.Rational fertilizer use for stabilizing grain production and crop straw incorporation are promising measures for potential carbon sequestration in this region.

机译：土壤有机质（SOM）的变化会影响粮食安全，水土保持和气候变化。但是，由于研究了农业管理和环境因素的影响，中国水稻土中SOM变化的驱动因素尚未得到充分认识。根据中国代表性土壤类型和耕作制度，从6个县选出的土壤，气候，地形和农业管理数据进行了相关分析，方差分析和森林模型分析，分析了稻田土壤中SOM变化的动因。在1980年至2011年的长江中下游地区，本研究的目的是确定驱动SOM变化的主要因素并定量评价它们的个人影响。在为期31年的研究期内，平均每年0.023千克m-2年的收割率为12.5％。由于长期种植水稻，农业管理实践导致在主要的驱动因素中，秸秆掺入，最有影响力的驱动因素以及施肥和耕作方式一起显着增加了SOM的积累，而温度的升高则显着影响了SOM的分解。为应对气温上升的挑战，重要的是加强农业管理的积极作用。合理使用肥料稳定谷物生产和秸秆还田是该地区潜在固碳的有希望的措施。

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《土壤圈（英文版）》 |2017年第5期|926-937|共12页
作者
GUO Naijia; SHI Xuezheng; ZHAO Yongcun; XU Shengxiang; WANG Meiyan; ZHANG Ganlin; WU Jinshui; HUANG Biao; KONG Chao;
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作者单位

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

University of Chinese Academy of Sciences, Beijing 100049 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

University of Chinese Academy of Sciences, Beijing 100049 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

University of Chinese Academy of Sciences, Beijing 100049 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

University of Chinese Academy of Sciences, Beijing 100049 China;

Key Laboratory for Agro-Ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

University of Chinese Academy of Sciences, Beijing 100049 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

University of Chinese Academy of Sciences, Beijing 100049 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Environmental and Anthropogenic Factors Driving Changes in Paddy Soil Organic Matter: A Case Study in the Middle and Lower Yangtze River Plain of China

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