CAJ | 학술논문

利用紫色土养分循环长期定位研究平台，通过静态箱-气袋采气-化学发光氮氧化物分析仪观测了紫色土夏玉米-冬小麦轮作周期的NO周年排放特征。结果表明，施肥促发紫色土NO的峰值排放，玉米与小麦季的土壤NO排放峰值均出现在施肥后20 d内。常规夏玉米-冬小麦轮作条件下NO年累积排放通量为0.450 kg N·hm-2,其中玉米季的NO累积排放通量为0.200 kg N·hm-2，排放系数为0.13％，小麦季的NO累积排放通量为0.250 kg N·hm-2，排放系数为0.20％。玉米季的NO排放速率与土壤表层温度呈指数响应关系，小麦季与温度关系不明显。土壤湿度对于玉米季常规施肥条件下NO的排放有显著的响应关系。种植作物的土壤较裸地的NO排放通量都有不同程度的降低。
이용자색토양분순배장기정위연구평태，통과정태상-기대채기-화학발광담양화물분석의관측료자색토하옥미-동소맥륜작주기적NO주년배방특정。결과표명，시비촉발자색토NO적봉치배방，옥미여소맥계적토양NO배방봉치균출현재시비후20 d내。상규하옥미-동소맥륜작조건하NO년루적배방통량위0.450 kg N·hm-2,기중옥미계적NO루적배방통량위0.200 kg N·hm-2，배방계수위0.13％，소맥계적NO루적배방통량위0.250 kg N·hm-2，배방계수위0.20％。옥미계적NO배방속솔여토양표층온도정지수향응관계，소맥계여온도관계불명현。토양습도대우옥미계상규시비조건하NO적배방유현저적향응관계。충식작물적토양교라지적NO배방통량도유불동정도적강저。
Static-gas collection technique combined with chem-luminescent analyzer was used to measure NO emitted from agro-ecosystem of purple soil under summer maize-winter wheat rotation during June 2013 to May 2014. Long term synthetic NPK fertilizer(NPK)and no fertilizer treatments(CK)were used to calculate NO emission factor(EF)induced by N fertilization. Fertilization was the cause of NO emis-sions in both maize and wheat seasons. The NO emissions reached peak 20 days after fertilization, and then decreased and maintained at low fluxes during the rest period of the season. The cumulative NO emissions during whole maize-wheat rotation was 0.450 kg N·hm-2, of which the maize season accounted for 0.200 kg N·hm-2 with EF of 0.13%while the wheat season was 0.250 kg N·hm-2 with EF of 0.20%. There was significant relationship between NO emission flux and soil temperature and soil moisture in the maize season, whereas no relationship was found in the wheat season. This may imply complicated influencing factors of soil NO emissions. Plant growth reduced NO emissions compared to bare soil due to the N absorption by plants.