Table 5 Partial least squares regression analysis of the relationships between soil labile organic carbon fractions and soil enzymes.

From: Soil labile organic carbon fractions and soil enzyme activities after 10 years of continuous fertilization and wheat residue incorporation

Models

R2

LFOC = 0.010 CL + 0.035 BG − 0.080 LiP + 0.041 MnP − 0.002 LA − 9.024

0.98

POXC = − 0.003 CL + 0.044 BG + 0.029 LiP + 0.013MnP − 0.002 LA − 0.304

0.96

DOC = 0.115 CL + 2.155 BG + 5.150 LiP + 0.455 MnP − 0.152 LA − 82.127

0.96

  1. The ACX was removed from the regression model due to its low variable importance in projection value (< 0.8).
  2. LFOC: light fraction organic carbon; POXC: permanganate oxidized carbon; DOC: dissolved organic carbon. DOC: dissolved organic carbon; CL: cellulase; BG: β-glucosidase; LiP: lignin peroxidase; MnP: manganese peroxidase; LA: laccase.
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