施肥对土壤呼吸的影响  

The Effect of Fertilization on Soil Respiration

作　　者：芦思佳[1,2] 韩晓增[1] 

机构地区：[1]中国科学院东北地理与农业生态研究所,黑龙江哈尔滨150081 [2]东北农业大学资源与环境学院,黑龙江哈尔滨150030

出　　处：《农业系统科学与综合研究》2011年第3期366-370,共5页System Sciemces and Comprehensive Studies In Agriculture

基　　金：国家重点基础研究发展计划(973计划)(2005CB121101);国家自然科学基金(40971152)

摘　　要：以中国科学院海伦农业生态实验站长期肥料定位试验为研究平台,研究玉米生长条件下,不同施肥处理对土壤呼吸和水溶性有机碳的影响。结果表明,玉米生长期间,各施肥处理的土壤呼吸速率变化趋势较为一致,变化范围（CO2-C）是43.86 mg.m-2.h-1~359.32 mg.m-2.h-1,在7月12日达到最大值。NPKOM处理的土壤呼吸速率以及累积呼吸量明显大于其它施肥处理。CK处理Q10最大,表明施肥降低了土壤呼吸对温度的敏感性。不同施肥处理（除PK处理）的Q10都呈现15 cm地温最高,地表温度最低。有机肥能够增加土壤水溶性有机碳的含量,氮肥会减少水溶性有机碳的含量。Effect of long-term fertilization on soil respiration and water dissolved organic carbon were investigated during the growth stages of maize at the Hailun Agricultural Ecology Station.The results showed：soil respiration with different fertilizations had the same regulation and reached the highest peak on the 12th of July,CO2-C changing from 43.86 mg·m-2·h-1to 359.32 mg·m-2·h-1.The rate and cumulation of soil respiration with the treatment of NPKOM were higher than other treatments obviously.Q10 of CK was the highest indicated that fertilization reduced the sensitivity of soil respiration to temperature.Q10 under different treatment（except PK treatment） had the highest relationship with 15cm underground temperature and had the lowest relationship with temperature of ground.The application of organic manure could increase the amount of water dissolved organic carbon,but nitrogenous fertilizer reduced the amount.

关 键 词：土壤呼吸 水溶性有机碳 长期定量施肥 

分 类 号：S153[农业科学—土壤学]