CAJ | 학술논문

为了探明无机肥和有机肥施用对板栗林地土壤CH4吸收通量动态的影响，探讨板栗林地土壤CH4通量与环境因子之间的关系，在浙江省临安市典型板栗林样地布置施肥试验。于2011年6月2012年6月期间，采用静态箱-气相色谱法测定了不施肥（CK）、无机肥（IF）、有机肥（OF）和有机无机混合肥（OIF）处理下土壤CH4吸收通量的全年动态变化，并测定了土壤温度、土壤水分、水溶性有机碳（WSOC）和微生物量碳（MBC）含量。结果表明，板栗林土壤CH4吸收通量呈现明显的季节性变化，最大值出现在9月，最小值出现在23月；施肥处理均显著抑制了土壤CH4的吸收，具体表现为IF、OF和OIF处理下土壤CH4年吸收量与CK处理[ CH43.09 kg/（ hm2· a）]相比分别减少了7.0％、1.6％和4.4％。此外，施肥显著增加了土壤WSOC和MBC含量（P＜0.05），且施肥使土壤碱解氮、铵态氮、硝态氮、全氮和有机质含量均有不同程度的增加。相关性分析表明，土壤CH4吸收通量与土壤表层5 cm处温度之间呈显著正相关（P＜0.05），但与土壤水分、MBC含量之间没有显著相关性；土壤CH4吸收与土壤WSOC含量之间（除CK处理外）均具有显著相关性（ P＜0.05）。因此，施肥引起土壤理化性质[如NH4＋-N、NO3--N、全氮（ TN）、有机碳（ SOC）等]和WSOC含量的改变可能是施肥显著抑制了板栗林土壤CH4排放的主要原因。
위료탐명무궤비화유궤비시용대판률임지토양CH4흡수통량동태적영향，탐토판률임지토양CH4통량여배경인자지간적관계，재절강성림안시전형판률림양지포치시비시험。우2011년6월2012년6월기간，채용정태상-기상색보법측정료불시비（CK）、무궤비（IF）、유궤비（OF）화유궤무궤혼합비（OIF）처리하토양CH4흡수통량적전년동태변화，병측정료토양온도、토양수분、수용성유궤탄（WSOC）화미생물량탄（MBC）함량。결과표명，판률림토양CH4흡수통량정현명현적계절성변화，최대치출현재9월，최소치출현재23월；시비처리균현저억제료토양CH4적흡수，구체표현위IF、OF화OIF처리하토양CH4년흡수량여CK처리[ CH43.09 kg/（ hm2· a）]상비분별감소료7.0％、1.6％화4.4％。차외，시비현저증가료토양WSOC화MBC함량（P＜0.05），차시비사토양감해담、안태담、초태담、전담화유궤질함량균유불동정도적증가。상관성분석표명，토양CH4흡수통량여토양표층5 cm처온도지간정현저정상관（P＜0.05），단여토양수분、MBC함량지간몰유현저상관성；토양CH4흡수여토양WSOC함량지간（제CK처리외）균구유현저상관성（ P＜0.05）。인차，시비인기토양이화성질[여NH4＋-N、NO3--N、전담（ TN）、유궤탄（ SOC）등]화WSOC함량적개변가능시시비현저억제료판률림토양CH4배방적주요원인。
To investigate the effects of inorganic and organic fertilizers on seasonal variation of CH 4 uptake flux in the soil of Chinese chestnut stands and to explore the relationships between the CH 4 uptake flux and various environmental factors , a field study including control ( CK) , inorganic fertilizer ( IF) , organic fertilizer ( OF) , and half organic plus half inorganic fertilizer ( OIF) treatments was conducted in typical Chinese chestnut stands in Lin ’ an, Zhejiang Province.Soil CH4 uptake fluxes were analyzed by static closed chamber/GC technique, and soil temperature , soil water content , WSOC and MBC concentrations were determined as well .Results showed that soil CH4 uptake fluxes exhibited a strong seasonal pattern , with the maximum values in September and the minimum in February or March.Application of inorganic fertilizer significantly inhibited the soil CH 4 uptake(P<0.05), and annual accumulation of soil CH 4 uptake in IF, OF, and OIF treatments were 7.0%, 1.6%, and 4.4%lower than in CK [CH4 3.09 kg/(ha· a)], respectively.In addition, fertilization significantly increased soil WSOC and MBC concentrations(P<0.05) and partly increased the concentrations of soil available nitrogen , ammonium nitrogen, nitrate nitrogen , total nitrogen , and soil organic matter .The correlation analysis showed that soil CH 4 uptake fluxes had a significant positive correlation with soil temperature at 5 cm depth ( P <0.05 ) , but had no significant correlation with soil water content and soil MBC concentration in all treatments .Soil CH4 uptake rate was correlated with soil WSOC concentration except in CK ( P <0.05 ) .In conclusion , the change of soil physicochemical properties(NH4+-N, NO3--N, TN and SOC) and WSOC concentration caused by fertilization was probably the main reason for the inhibition of soil CH 4 uptake in Chinese chestnut stands induced by fertilization .