Table 1.
Soil carbon fractions before incubation.
Table 2.
Soil carbon fractions after incubation.
Fig 1.
Soil respiration rate under different mulching methods and incubation temperatures.
CK: no mulching; SM: straw mulching.
Fig 2.
Cumulative soil respiration over the 60-day incubation under straw mulching and no mulching at different incubation temperatures.
a CK: no mulching; SM: straw mulching. b Different lowercase letters indicate significant difference between straw mulching and no mulching.
Fig 3.
Soil microbial metabolic quotient (qCO2) under different mulching treatments and incubation temperatures.
CK: no mulching; SM: straw mulching.
Table 3.
Regression equations between cumulative Soil Respiration (Rs) and incubation Temperature (T) under no mulching and straw mulching.
Table 4.
Soil bacterial and fungal diversity (Shannon index) and richness (Chao1 index) under different mulching methods before incubation.
Table 5.
Soil bacterial and fungal diversity (Shannon index) and richness (Chao1 index) under different mulching methods after incubation.
Fig 4.
Principal Coordinates Analysis (PCoA) of soil microbial community composition under straw mulching and no mulching after incubation based on Bray-Curtis distances.
CK: no mulching; SM: straw mulching.
Fig 5.
Principal Coordinates Analysis (PCoA) of soil bacterial community composition at different incubation temperatures based on Bray-Curtis distances.
CK: no mulching; SM: straw mulching.
Fig 6.
Relative abundances of (a) bacterial and (b) fungal phyla under straw mulching and no mulching before and after incubation.
CK: no mulching; SM: straw mulching.
Fig 7.
Plots of the eigenvectors from Redundancy Analysis (RDA) in the plane of the first two axes to show the relations among the microbial populations (black arrows) and soil C fractions and respiration (SR) (red arrows).
Proteobacteria (Prot), Actinobacteria (Acti), Chloroflexi (Chlo), Acidobacteria (Acid), Gemmatimonadetes (Gemm), Nitrospirae (Nitr), Planctomycetes (Plan), Bacteroidetes (Bact), Ascomycota (Asco), Zygomycota (Zygo), Basidiomycota (Basi) and unidentified (unid).