长期化肥施用对双季稻田土壤有机碳的影响  

Effects of long-term chemical fertilizer application on soil organic carbon in double-cropping paddy fields

作　　者：张翔 魏文学[2] 陈安磊[2] ZHANG Xiang;WEI Wen-xue;CHEN An-lei(University of Chinese Academy of Sciences,Beijing 100049;Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha Hunan 410125)

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院亚热带农业生态研究所,湖南长沙410125

出　　处：《中国土壤与肥料》2022年第6期33-38,共6页Soil and Fertilizer Sciences in China

基　　金：科技部国家重点研发计划项目(2017YFD0301504)。

摘　　要：施用化肥是提高水稻产量的重要措施,但长期施用化肥对稻田土壤有机碳(SOC)含量影响的认识不清晰。依托中国科学院桃源农业生态试验站稻田长期施肥定位试验,系统研究了不施肥、仅施N肥、施NP肥和施NPK肥处理的水稻产量和SOC含量的变化规律。结果表明,长期施用化肥可以提高水稻土SOC含量,而且平衡施肥处理(施NPK肥)的SOC含量处于相对最高水平;SOC含量的变化与每年水稻根茬残留量显著相关。因此,长期施用化肥对SOC含量的影响主要取决于产量效益,合理施肥获得高产的同时也会增加SOC含量。The application of chemical fertilizers is an important measure to increase the rice yield,but the effect of longterm application of chemical fertilizers on the soil organic carbon(SOC)content of paddy soil is unclear.Based on the longterm fertilization experiment at the Taoyuan Agro-ecology Experimental Station of the Chinese Academy of Sciences,this paper systematically studied the changes in rice yields and SOC content of different treatments including no fertilization,only N fertilizer application,NP fertilizer application and NPK fertilizer application.The results showed that long-term application of chemical fertilizers increased the SOC content of paddy soil,and the SOC content of balanced fertilization treatment(NPK fertilizer application)was at the relatively highest level;the changes of SOC content was significantly related to the amount of rice stubble residue input in each year.Therefore,the effect of long-term application of chemical fertilizers on the content of SOC mainly depends on the yields benefit.Balanced fertilization will also increase the content of SOC while obtaining high yields.

关 键 词：长期施肥 稻田土壤 产量 

分 类 号：S511.42[农业科学—作物学] S153.6