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Supplemental Information

Supplemental material 1a: the relative contents of the organic matters

Supplemental material 1a: the relative contents of the organic matters

DOI: 10.7287/peerj.preprints.2624v2/supp-1

Supplemental material 1b: the relative contents of the organic matters.

DOI: 10.7287/peerj.preprints.2624v2/supp-2

the primitive data of figure 2

DOI: 10.7287/peerj.preprints.2624v2/supp-3

the primitive data of figure 3

DOI: 10.7287/peerj.preprints.2624v2/supp-4

the primitive data of table 4

DOI: 10.7287/peerj.preprints.2624v2/supp-5

the primitive data of table 5

DOI: 10.7287/peerj.preprints.2624v2/supp-6

the primitive data of table 6

DOI: 10.7287/peerj.preprints.2624v2/supp-7

Additional Information

Competing Interests

The authors declare that they have no competing interests. Hong Fang is an employee of Water-affair Authority of Xifeng County, Guiyang, Guizhou, China.

Author Contributions

Zhenhong Wang conceived and designed the experiments, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Hong Fang performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables.

Mouhui Chen performed the experiments.

Field Study Permissions

The following information was supplied relating to field study approvals (i.e., approving body and any reference numbers):

All field experiments in the study were approved by Administration Bureau of Two Lakes and One Reservoir in Guiyang City (ABTLORGC).

Data Deposition

The following information was supplied regarding data availability:

The raw data has been supplied as a supplementary file.

Funding

This work was supported by grants from the National Natural Science Foundation of China (No. 40861015), the Foundation of State Key Laboratory of Soil Erosion and Dryland Forming on Loess Plateau (No. 10501-161). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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