Soil Respiration and Impact Factors of Pinus tabulaeformis Forest and Mixed Broad-leaved Forest in Liaoheyuan Nature Reserve of Northern Hebei
We studied the soil respiration of mixed broad-leaved forest ( MBF) and Pinus tabulaeformis forest ( YF) within the growing season, and discussed the relationships between soil respiration rate and soil moisture at 5 cm depth ( W) , soil temperature at 5 cm, 10 cm, 15 cm depth ( T5 , T10 , T15 ) , near-surface air temperature ( Ta ) , soil microbial biomass car-bon ( MBC ) , soil physical and chemical properties in Liaoheyuan Nature Reserve of Northern Hebei.The seasonal varia-tions of YF and MBF’s soil respiration rate represented a single peak curve with the means of 4.28 and 3.69μmol· m-2· s-1 , respectively.It was the same with the seasonal variation of soil temperature curve, but laged behind atmospheric tem-perature.T5, T10, T15, Ta and corresponding soil respiration of MBF, YF showed a significant positive correlation (P<0.01), and the relationship between W, each layer of MBC and soil respiration were not significant.But significance between com-munities of soil organic carbon, w(C)/w(N), total nitrogen, total phosphorus, soil microbial biomass carbon reached sig-nificant levels.By comprehensive analysis, T5 was the main factor leading forest soil respiration seasonal variations in this area, and the combined effects of MBC, litter type and soil physical and chemical properties in all probability caused the differences between the soil respirations of two communities.
Pinus tabulaeformis ForestMixed Broad-leaved ForestSoil respirationSoil temperatureSoil microbi-al biomass carbonSoil physical and chemical properties
NETL
NSTL
万方数据
维普
