植物营养与肥料学报Issue(6)：1428-1437,10.DOI:10.11674/zwyf.2013.0617
施肥对板栗林土壤 CH4吸收通量动态的影响
Effects of fertilization on seasonal variations of soil CH4 uptake fluxes in Chinese chestnut stands
摘要
Abstract
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 .关键词
板栗林/CH4吸收通量/施肥/水溶性有机碳/微生物量碳Key words
Castanea mollissima/CH4 uptake flux/fertilization/water-soluble organic carbon(WSOC)/microbial biomass carbon(MBC)分类
农业科技引用本文复制引用
张蛟蛟,李永夫,姜培坤,周国模,刘娟..施肥对板栗林土壤 CH4吸收通量动态的影响[J].植物营养与肥料学报,2013,(6):1428-1437,10.基金项目
浙江省科技厅重点项目（2011C12019）；国家自然科学基金项目（31170576）；浙江省重点科技创新团队项目（2010R50030）资助。 （）
