摘要
为了研究连续多年施用有机肥、化肥后设施土壤N2O排放通量特征,设不施肥(T0)、有机无机配施(T1)、单施有机肥(T2)、单施化肥(T3)等4个处理,采用密闭式静态箱-气相色谱法测定了长期不同施肥处理对设施菜地N2O排放通量的影响。结果表明,设施菜田土壤有机肥和氮肥基施均会显著增加土壤N2O排放,追施氮肥后0~3 d也会出现明显的排放高峰。各处理在种植季内土壤N2O排放总量的次序是:T2(N 5.72~5.85 kg/hm^2)>T1(N 4.06~4.21 kg/hm^2)>T3(N 3.08~3.68 kg/hm^2)>T0(N 0.53~0.76 kg/hm^2)。可见,有机肥的施用可以增加设施菜地N2O排放,在氮素总量投入相同的前提下,连续10年有机无机配施后,土壤N2O的排放量比单独施用有机肥低,但比单独施用化肥高,因此,合理施用有机肥是减少温室气体N2O排放的重要措施。
In order to study the N2O emission flux characteristics of greenhouse soil after applying organic fertilizer and chemical fertilizer for many years,four treatments were set up,including control treatment(T0),combined application of inorganic fertilizer and organic fertilizer(T1),organic fertilizer(T2)and chemical fertilizer(T3).The static chamber-gas chromatograph technique was used to identify the effects of long-term fertilization on N2O emission flux from greenhouse soil.Results showed that the application of organic fertilizer and nitrogen fertilizer as base fertilizer significantly increased N2O emission.The emission peak of N2O generally occurred at 0-3 days after nitrogen topdressing.During the whole growing period,total N2O emission followed the order of T2(N 5.72-5.85 kg/hm^2)>T1(N 4.06-4.21 kg/hm^2)>T3(N 3.08-3.68 kg/hm^2)>T0(N 0.53-0.76 kg/hm^2).The application of organic fertilizer can increase soil N2O emission.Under the premise of the same total nitrogen input,the N2O emission in the treatment of T1 for ten years was higher than that in the treatment of T3,but lower than that in the treatment of T2.Therefore,rational application of organic fertilizer is an important measure to reduce N2O emission.
作者
颜芳
刘继培
王伊琨
张蕾
赵凯丽
王维瑞
王胜涛
YAN Fang;LIU Ji-pei;WANG Yi-kun;ZHANG Lei;ZHAO Kai-li;WANG Wei-rui;WANG Sheng-tao(Beijing Soil and Fertilizer Extension Service Station, Beijing 100029, China;Daxing Soil and Fertilizer Station, Beijing 102600, China)
出处
《江苏农业学报》
CSCD
北大核心
2020年第4期949-954,共6页
Jiangsu Journal of Agricultural Sciences
基金
北京市农业科技项目(20180206)。
