林业科学Issue(8)：7-14,8.DOI:10.11707/j.1001-7488.20140802
亚热带米老排和杉木人工林土壤呼吸季节动态及其影响因子
Seasonal Dynamics of Soil Respiration and Its Affecting Factors in Subtropical Mytilaria laosensis and Cunninghamia lanceolata Plantations
摘要
Abstract
We investigated monthly soil respiration (Rs) and the affecting factors under 19-year-old Mytilaria laosensis and Cunninghamia lanceolata plantations replanted in a C. lanceolata woodland slash in subtropical China. The results showed that the average annual Rs rates were 2.95 μmolCO2 ·m -2 s -1 under M. laosensis plantations and 2. 37 μmolCO2 · m -2 s -1 under C. lanceolata plantations. The Q10 value was 1. 83 under M. laosensis plantations,which was significantly lower than 1. 99 under C. lanceolata plantations. The Rs rates exhibited distinct seasonal patterns under both M. laosensis plantations and C. lanceolata plantations and were dominantly controlled by the soil temperature,accounting for 77. 0%and 81. 6% of monthly variation,respectively. Linear regression analysis showed that Rs was significantly correlated with annual litter biomass,fine root biomass,soil organic carbon content,light fraction organic carbon content,microbial biomass carbon concentration and dissolved organic carbon concentration ( P<0 . 05 ) . Stepwise regression analysis showed that litter biomass and microbial biomass carbon concentration were the most important affecting factors of Rs. Our results suggest that differences of Rs in different vegetation types may be attributed to the variations in the quantity and quality of litter input and the soil microbial biomass.关键词
杉木/米老排/土壤呼吸/易变性有机碳/树种Key words
Cunninghamia lanceolata/Mytilaria laosensis/soil respiration/soil labile organic carbon/tree species分类
农业科技引用本文复制引用
余再鹏,黄志群,王民煌,胡振宏,万晓华,刘瑞强,郑璐嘉..亚热带米老排和杉木人工林土壤呼吸季节动态及其影响因子[J].林业科学,2014,(8):7-14,8.基金项目
2011年教育部新世纪优秀人才支持计划(DB-168) （DB-168）
2012年福建省杰出青年科学基金项目(2060203)。 （2060203）
