Effects of stand density on soil respiration and labile organic carbon in different aged Larix principis-rupprechtii plantations

Ecological Processes

Table 2 Analytical results of the factors affecting Rs, Rh, Ra, and soil labile organic carbon. In the table, asterisk represents statistical significance, in which P < 0.05, P < 0.01, and P < 0.001. Rs, soil respiration; Rh, heterotrophic respiration; Ra, autotrophic respiration; SOC, soil organic carbon; DOC, soil dissolved organic carbon; MBC, microbial biomass carbon; LFOC, light fraction organic carbon; ROC, readily oxidized carbon

Factor	Stand density		Stand age		Stand age × stand density
Factor	F value	P value	F value	P value	F value	P value
Rs	8.002	0.010*	2.488	0.107	1.323	0.287
Rh	12.987	0.002**	2.577	0.099	0.691	0.512
Ra	0.038	0.847	2.411	0.114	0.958	0.400
SOC	151.631	< 0.001***	72.849	< 0.001***	0.722	0.498
ROC	3.174	0.089	9.225	0.001**	0.24	0.788
MBC	18.382	< 0.001***	12.163	< 0.001***	0.433	0.654
DOC	364.062	< 0.001***	469.313	< 0.001***	3.501	0.048*
LFOC	67.413	< 0.001***	24.824	< 0.001***	4.059	0.032*