近40年黑龙江省两大平原土壤有机质时空变化规律

doi:10.11720/wtyht.2024.0129

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Abstract

The spatiotemporal changes in soil organic matter (SOM) hold great significance forthe elevation of both regional soilquality and the potential of soil carbon sequestration. Based on two periods of soil data from the second soil reconnaissance surveyof Heilongjiang Province in 1980 and thesoil geochemical survey of Heilongjiang Province in 2020, this study analyzed the spatiotemporal changes in SOM content in surface soil (0~20 cm) in the Songnen and Sanjiang plains in Heilongjiang Province over 40 years through spatial analysis in GIS. Furthermore, this study summarized the distribution patterns of SOM lossof different soil types in various cities and counties. The results indicate that the average SOM content in the surface soil in the major two plains decreased by 5.68×10^-3over 40 years, generallyexhibiting a downward trend. Areas with decreased SOM are primarily distributed in Qiqihar, Daqing, western Suihua of the Songnen Plain, along with Hegang and western Jiamusi of the Sanjiang Plain, with the largest decreased amplitudeobserved in the Qiqihar Zhaoyuan area along the Nenjiang River basin. Regarding soil types, swampsoils exhibited the highestSOM loss rate (-44.68%), while grassland soilsexhibited a contribution rate for SOM of 44.14%, which established these soilsas the soil type making the most significant contribution to SOM in both plains. The SOM loss area in Wangkui County, Zhaoyuan County, and Daqing City accounted for over 72.11% of the total. This study determines the spatiotemporal changes in SOM in the major two basins in Heilongjiang Province on a scale of 40 years, providing a theoretical basis for the primary prevention and control targets of regional black soil degradation.

Key words： soil organic matter spatiotemporal change rule loss two major plains

Received: 28 March 2024 Published: 19 September 2024

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	Articles by authors
	He-Ping YANG
	Xiao-Jing ZHAO
	Jiang-Jun SUN

Cite this article:

He-Ping YANG,Xiao-Jing ZHAO,Jiang-Jun SUN. Spatiotemporal changes of soil organic matter in the Songnen and Sanjiang plains of Heilongjiang Province over 40 years[J]. Geophysical and Geochemical Exploration, 2024, 48(4): 1103-1113.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.0129 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I4/1103

Soil type in the two great plains of Heilongjiang Province

Situation of land use in the two great plains of Heilongjiang Province

Statistics of SOM content in surface soil (0~20 cm) in the two great plains of Heilongjiang Province from 1980 to 2020

Statistics on the classification characteristics of SOM content insurface soil (0~20 cm) in the two great plains of Heilongjiang Province from 1980 to 2020

Spatial distribution of SOM in surface soil in the two great plains of Heilongjiang Province in 1980

Spatial distribution of SOM in surface soil in the two great plains of Heilongjiang Province in 2020

Statistical characteristics of ΔSOM in surface soil (0~20 cm) in the two treat plains of Heilongjiang Province from 1980 to 2020

Spatial distribution of SOM changes in surface soil in the two great plains of Heilongjiang Province from 1980 to 2020

Statistical characteristics of changes of SOM content levels in surface soil (0~20 cm) under different situation of land use in the two great plains from 1980 to 2020

Statistical characteristics of changes of SOM content levels in surface soil (0~20 cm) of the main soil types in the two great plains from 1980 to 2020

Statistics on the characteristics of SOM content loss in surface soil (0~20 cm) of the main soil types in the two great plains from 1980 to 2020

Statistics of SOM content loss area and proportion in surface soil (0~20 cm) in the main cities and counties in the two great plains from 1980 to 2020

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