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Stoichiometric patterns of soil carbon, nitrogen, and phosphorus in farmland of the Poyang Lake region in Southern China

  • Yefeng Jiang
  • Xi GuoEmail author
Soils, Sec 2 • Global Change, Environ Risk Assess, Sustainable Land Use • Research Article
  • 29 Downloads

Abstract

Purpose

Previous studies have reported the occurrence of a Redfield-type ratio (e.g., C/N/P, C/N, C/P, or N/P) between C, N, and P concentrations in marine and (in part) terrestrial ecosystems. Herein, we aimed to determine whether a similar Redfield-type ratio can occur in farmland soil, as well as to elucidate how the C, N, and P ratios change with farmland-use types, soil physicochemical properties, and environmental factors.

Materials and methods

The stoichiometric patterns of soil C, N, and P in farmland were analyzed based on 6150 samples (0–20 cm) collected in 2012 by the Soil Testing and Formulated Fertilization Project in the Poyang Lake region of Southern China.

Results and discussion

The average soil C/N/P ratio in farmland of the study region was 98.4:16:1, which was slightly lower than the Redfield ratio of 106:16:1. There was no significant correlation between the concentrations of C, N, and P, indicating the absence of Redfield-type C/N/P, C/P, and N/P ratios. In contrast, the correlation between the concentrations of C and N was significant, indicating the presence of a stable Redfield-type C/N ratio in farmland soil. The average soil C/N, C/P, and N/P ratios corresponding to various farmland-use types showed significant differences (p < 0.01). In addition, all three ratios showed significant correlation with the latitude, soil pH, and mean annual precipitation.

Conclusions

There are no stable Redfield-type C/N/P, C/P, and N/P ratios while a stable Redfield-type C/N ratio exists in farmland soil in the Poyang Lake region. We urgently need to carry out ecological control experiments and field fertilization observations to understand the relationship between the stability of soil elements and fertilizer application in farmland.

Keywords

Ecological stoichiometry Farmland-use type Poyang Lake region Redfield-type ratio 

Notes

Funding information

This work was supported by the National Key R&D Program of China (Grant No. 2017YFD0301603).

Supplementary material

11368_2019_2317_MOESM1_ESM.xlsx (869 kb)
ESM 1 (XLSX 869 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Land Resource and EnvironmentJiangxi Agricultural UniversityNanchangChina
  2. 2.Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi ProvinceJiangxi Agricultural UniversityNanchangChina

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