What does this research mean for the field?

Soil organic carbon and total nitrogen in the Yellow River Delta exhibit distinct horizontal and vertical spatial patterns that are positively driven by soil moisture and clay content, and negatively correlated with soil salinity. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the regional spatial patterns and vertical variations of soil organic carbon, total nitrogen, and carbon-to-nitrogen ratios across soil salinity gradients in an estuarine delta.

August 29, 2026AgricultureOpen Access

Spatial Distribution of Soil Organic Carbon and Nitrogen Across Salinity Gradients in the Yellow River Delta, China

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To evaluate the regional spatial patterns and vertical variations of soil organic carbon, total nitrogen, and carbon-to-nitrogen ratios across soil salinity gradients in an estuarine delta.
Analyzed 228 soil samples collected from 76 sites across a salinity gradient in the Yellow River Delta at depths of 0–15, 15–30, and 30–45 cm.
Constructed a spatial salinity map and assessed correlations between nutrient levels, electrical conductivity, soil moisture, pH, and soil texture.
Soil organic carbon and total nitrogen contents declined significantly with increasing soil depth across all sampling locations (p < 0.05).
Nutrient levels in the 0–15 cm layer decreased from west to east, whereas concentrations in the 15–30 cm and 30–45 cm layers showed an opposing eastward increase.
Both carbon and nitrogen correlated negatively with electrical conductivity, especially at 0–15 cm, while showing positive correlations with total phosphorus, available potassium, moisture, clay content, and pH.

Authors

YLYang Liu LRLidong RenInstitute of Geographic Sciences and Natural Resources Research SZShixiang ZhaoInner Mongolia Agricultural University

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Implication

Spatial analysis reveals soil organic carbon and nitrogen decline with depth and salinity in estuarine soils, highlighting texture and moisture as key drivers of nutrient heterogeneity.

Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/6a9299bb8e5d7d1fc0c11d5a https://doi.org/10.3390/agriculture16171844

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Implication

Spatial analysis reveals soil organic carbon and nitrogen decline with depth and salinity in estuarine soils, highlighting texture and moisture as key drivers of nutrient heterogeneity.

Spatial Distribution of Soil Organic Carbon and Nitrogen Across Salinity Gradients in the Yellow River Delta, China

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Discussion

Implication

Cite This Study

Spatial Distribution of Soil Organic Carbon and Nitrogen Across Salinity Gradients in the Yellow River Delta, China

Key Points

Discussion

Implication

Cite This Study

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