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Table 5 Principal component analysis of leaf litter chemical traits

From: Leaf litter chemistry and its effects on soil microorganisms in different ages of Zanthoxylum planispinum var. Dintanensis

Indicator

Principal components

1

2

3

4

Organic carbon

0.060

−0.388

0.903

−0.033

Total nitrogen

−0.120

0.945

−0.177

−0.216

Total phosphorus

−0.902

0.339

−0.169

−0.139

Total potassium

0.225

0.561

0.703

0.077

Soluble sugars

0.523

−0.460

0.354

−0.560

Starch

0.021

−0.093

0.164

0.897

Lignin

−0.014

0.994

0.064

0.058

Cellulose

0.823

0.263

0.014

0.443

Hemicellulose

0.808

0.084

0.225

−0.450

Total phenol

0.488

0.174

0.636

0.381

Tannins

0.308

0.666

0.436

0.402

Lignin/nitrogen ratio

0.080

0.920

0.217

0.281

Lignin/phosphorus ratio

0.869

0.448

0.156

0.065

Nitrogen/phosphorus ratio

0.970

0.024

0.051

−0.088

Carbon/nitrogen ratio

0.106

−0.906

0.363

0.160

Carbon/phosphorus ratio

0.920

−0.318

0.152

−0.026

Eigenvalue

6.132

5.276

2.168

1.421

Variance contribution (%)

33.626

32.495

15.003

12.606

Total cumulative (%)

33.626

66.121

81.125

93.731

  1. Bolded values indicate high load values