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采用室内培养法研究了不同温度、水分和添加外源有机质对茶园土壤基础呼吸作用的影响。结果表明:土壤呼吸速率随着培养时间的变化而变化;温度对土壤呼吸的影响显著,在25℃条件下土壤呼吸碳积累量最大;水分对土壤呼吸速率的影响不显著,土壤水分为田间持水量的60%时,土壤呼吸碳积累量最大;添加外源有机质可以显著地增加土壤呼吸速率,且不同类型有机质对土壤呼吸速率的激发效应不同,土壤呼吸碳积累量表现为菜饼>尿素>腐熟猪粪>茶树枯落物>CK;土壤呼吸速率随着有机质添加量的增加而增大,且在一定范围内与有机质添加量呈显著的线性正相关。
The indoor culture method was used to study the effects of different temperature, moisture and exogenous organic matter on the soil respiration of tea plantation. The results showed that: the soil respiration rate varied with the incubation time; the temperature had a significant effect on soil respiration, and the maximum amount of soil respiration carbon was at 25 ℃; the effect of moisture on soil respiration rate was insignificant; The amount of soil respiration carbon was the largest when 60% water was added. Adding exogenous organic matter significantly increased the soil respiration rate, and different types of organic matter had different stimulating effects on soil respiration rate. Decomposed pig manure> tea tree litter> CK. Soil respiration rate increased with the increase of organic matter loading, and showed a significant linear positive correlation with organic matter loading within a certain range.