Contribution of above ground litterfall and roots to the soil CO2 efflux of two sub-tropical Cunninghamia lanceolata and Castanopsis carlesii forests
Contribution of above ground litterfall and roots to the soil CO2 efflux of two sub-tropical Cunninghamia lanceolata and Castanopsis carlesii forests
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地上凋落物和根系对两种亚热带杉木和槠林土壤二氧化碳流出的贡献
DOI：
10.1016/j.agrformet.2021.108671
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发表时间：
2021-12
影响因子：
6.2
通讯作者：
Yusheng Yang
中科院分区：
文献类型：
--
作者：
Xiaojie Li;Xiaofei Liu;Jinsheng Xie;Qiufang Zhang;Zhijie Yang;Andreas Schindlbacher;Yusheng Yang
土壤呼吸（RS）是陆地碳（C）向大气的最大通量，它会受到来自地表和地下的植物C输入的影响。特别是在热带和亚热带生态系统中，枯枝落叶层呼吸（RL）、自养呼吸（RA）和矿质土壤呼吸（RM）的贡献仍然知之甚少。在本研究中，RS在未处理的对照（CT），根排除（NR），凋落物排除（NL），和联合凋落物和根排除（NRNL）在亚热带杉木人工林和次生米槠林测定了三年。此外，凋落物输入，凋落物和土壤化学，微生物生物量和群落结构（PLFAs）进行了评估。RS在C.比针叶林C. lanceolataforest。C.比C. Lanceolataforest，而RM无显著差异。RM、RA和RL对RSunderC的贡献率分别为55%、29%和16%。lanceolata为39%，C. carlesii，分别。针叶林的地上凋落物输入量和微生物生物量较低。lanceolataforest。土壤微生物生物量在两种林分中均显著低于NL、NR和NRNL。NL对C.而NR和NRNL则影响了群落的组成。杉木总体而言，出乎意料的小，只有微不足道的添加剂的影响，凋落物排除和根排除在联合治疗（NRNL）表明，尚未解决的相互作用加速了分解的矿物土壤有机质和RM在这个最低的植物碳输入的情况下。因此，在这种情况下，地上和地下植物C输入同时变化，对RSand其组件的影响可能比单C源操纵研究所建议的更复杂。
Soil respiration (RS) is the largest terrestrial carbon (C) flux to the atmosphere, and it can be influenced by changing input of plant C from above- and/or below ground. Especially in tropical and sub-tropical ecosystems, the contributions of litter respiration (RL), autotrophic respiration (RA) and mineral soil respiration (RM) are still poorly understood. In the present study, RSwas measured under untreated control (CT), root exclusion (NR), litterfall exclusion (NL), and combined litterfall and root exclusion (NRNL) in a subtropicalCunninghamia lanceolataplantation and a secondaryCastanopsis carlesiiforest for three years. In addition, litter input, litter and soil chemistry, and microbial biomass and community structure (PLFAs) were assessed. RSwas significantly higher in theC. carlesiiforest than in the coniferousC. lanceolataforest. RLand RAwere significantly higher in theC. carlesiiforest than in theC. lanceolataforest, while there was no significant difference in RM. RM, RA, and RLcontributed 55%, 29%, and 16% to RSunderC. lanceolata, and 39%, 32%, and 29% underC. carlesii, respectively. Above ground litter input and microbial biomass were lower in the coniferousC. lanceolataforest. Soil microbial biomass was significantly lower in NL, NR and NRNL in both forests. NL had most pronounced effects on the microbial community composition in theC. carlesiisoil, whereas NR and NRNL affected the community composition inC. lanceolatasoil. Overall, the unexpectedly small and only insignificant additive effects of litter exclusion and root exclusion in the combined treatment (NRNL) suggest that yet unresolved interactions had accelerated the decomposition of mineral soil organic matter and RMunder this lowest plant C-input scenario. Hence, in the case that above and below ground plant C inputs change simultaneously, effects on RSand its components might be more complex than suggested by single-C-source manipulation studies.
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影响因子：
9.7
作者：
M. Swallow;S. Quideau;M. D. MacKenzie;B. Kishchuk
通讯作者：
M. Swallow;S. Quideau;M. D. MacKenzie;B. Kishchuk
DOI：
10.5860/choice.31-3799
发表时间：
2013-01
期刊：
--
影响因子：
--
作者：
S. Pal
通讯作者：
S. Pal
影响因子：
11.6
作者：
V. Suseela;N. Tharayil
通讯作者：
V. Suseela;N. Tharayil
影响因子：
9.4
作者：
Eastman, Brooke A.;Adams, Mary B.;Peterjohn, William T.
通讯作者：
Peterjohn, William T.
影响因子：
9.7
作者：
C. Thoms;G. Gleixner
通讯作者：
C. Thoms;G. Gleixner