Spatio-temporal variations in the soil organic carbon and total nitrogen contents in the Muling River-Xingkai Lake Plain

ZHANG Yi-He; YANG Ze; DAI Hui-Min; LIU Guo-Dong; HAN Xiao-Meng; LI Qiu-Yan

doi:10.11720/wtyht.2022.0047

2022 Vol. 46, No. 5

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Article navigation > Geophysical and Geochemical Exploration > 2022 > 46(5): 1050-1055

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ZHANG Yi-He, YANG Ze, DAI Hui-Min, LIU Guo-Dong, HAN Xiao-Meng, LI Qiu-Yan. 2022. Spatio-temporal variations in the soil organic carbon and total nitrogen contents in the Muling River-Xingkai Lake Plain. Geophysical and Geochemical Exploration, 46(5): 1050-1055. doi: 10.11720/wtyht.2022.0047

Citation:

ZHANG Yi-He, YANG Ze, DAI Hui-Min, LIU Guo-Dong, HAN Xiao-Meng, LI Qiu-Yan. 2022. Spatio-temporal variations in the soil organic carbon and total nitrogen contents in the Muling River-Xingkai Lake Plain. Geophysical and Geochemical Exploration, 46(5): 1050-1055. doi: 10.11720/wtyht.2022.0047

Spatio-temporal variations in the soil organic carbon and total nitrogen contents in the Muling River-Xingkai Lake Plain

1. Shenyang Center of China Geological Survey, Shenyang 110034, China；
2. Key Laboratory of Black Soil Evolution and Ecological Effect, Ministry of Natural Resources, Shenyang 110034, China；
3. Key Laboratory of Black Soil Evolution and Ecological Effect, Liaoning Province, Shenyang 110034, China

Received Date: 27 January 2022

Revised Date: 20 October 2022

Publish Date: 03 January 2023

Abstract

Abstract

The soil organic carbon (SOC) and total nitrogen (TN) contents serve as the basis for sustainable agriculture and the key to soil fertility and play an important role in maintaining the soil nutrient content. Based on the soil nutrient element data obtained from the 1:250,000 land quality geochemical survey and the second national soil census, this study investigated the spatio-temporal variations in the SOC and TN contents in the surface soil of the Muling River-Xingkai Lake Plain from 1979 to 2019 using the geostatistical method and the geographic information system (GIS) technique. The results show that the SOC and TN contents in the surface soil of the study area are mainly at grade Ⅲ or above. They are rich or highly rich overall but are deficient locally. During 40 years of evolution, the SOC and TN contents decreased by 25.65% and 29.87%, respectively, and the C/N ratio increased by 6.00%. Compared with those in 1979, the SOC and TN contents in the surface soil decreased in different soil types except for paddy soil. The transition from the natural ecosystem into farmland also decreased the SOC and TN contents. These results indicate that factors such as changes in soil types and land uses have significant effects on the degree of the spatial variations in soil nutrients in the study area.
- Muling River-Xingkai Lake Plain /
- organic carbon /
- total nitrogen /
- spatial and temporal variation

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References

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