长期施肥下鄱阳湖区双季稻田土壤有机碳演变  

Evolution of Soil Organic Carbon under Long-term Fertilization in a Double Cropping Rice Field in Poyang Lake Region of Jiangxi Province

作　　者：胡明芳[1] 

机构地区：[1]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011

出　　处：《土壤通报》2016年第5期1190-1194,共5页Chinese Journal of Soil Science

基　　金：国家自然基金(31460544);农业部公益性行业专项(201203030);国家支撑计划(2012BAD05B05)资助

摘　　要：以江西鄱阳湖区双季稻田施肥效应和土壤肥力变化长期定位试验为对象,研究了长期施肥条件下鄱阳湖区双季稻田土壤有机碳(SOC)的变化规律。结果表明,不施肥或缺施N、P处理均造成SOC含量显著降低,而有机无机肥配施均促进SOC含量显著提高,且SOC含量随有机肥配施比例提高而增加;土壤有机碳储量随着外源有机碳投入的增加而增加,且随着试验年限延长,土壤有机碳储量逐渐升高;土壤有机碳储量年均变化量与外源碳年均投入量呈显著正相关关系。说明外源碳的投入有利于促进土壤有机碳含量和储量的提升。Evolution of soil organic carbon （SOC） under long-term fertilization in a double cropping rice field in Poyang Lake Region of Jiangxi Province was studied. The results showed that no fertilizer or the fertilizer lack of N and P decreased significantly the content of SOC. While combined application of organic manure and chemical fertilizer increased significantly the content of SOC. The content of SOC increased with the proportion of organic manure added. The storage of SOC increased with the increase of the amount of exogenous organic carbon input and the extension of fertilization time. Annual variation of SOC storage was significantly positively correlated with annual average mass of exogenous organic carbon input. It indicated that exogenous carbon input was helpful to promote the increase of SOC content and storage.

关 键 词：长期施肥 有机无机肥配施 双季稻田 土壤有机碳 

分 类 号：S158.5[农业科学—土壤学]