Transformation of phosphorus forms and its regulation on phosphorus availability across differently degraded marsh soils

Bibliographic Data

ID21649216
AuthorsYulin Pu (0000-0002-6585-9436, College of Resource Science Sichuan Agricultural University Chengdu China), Yuanjun Luo (College of Resource Science Sichuan Agricultural University Chengdu China), Shirong Zhang (0000-0002-6975-5386, College of Environmental Science Sichuan Agricultural University Chengdu China, corresponding author), Ting Li (0000-0002-9614-1566, College of Resource Science Sichuan Agricultural University Chengdu China, corresponding author), Dagang Yuan (College of Resource Science Sichuan Agricultural University Chengdu China), Xiaoxun Xu (College of Environmental Science Sichuan Agricultural University Chengdu China), Hongyu Qian (College of Resource Science Sichuan Agricultural University Chengdu China), Guiying Wang (0000-0001-9601-8210, College of Resource Science Sichuan Agricultural University Chengdu China), Yongxia Jia (College of Resource Science Sichuan Agricultural University Chengdu China), Yun Li (0000-0001-8225-4554, College of Resource Science Sichuan Agricultural University Chengdu China)
Year2024
Volume35
Issue1
Pages264-279
Publication date2024-01-15
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.4914
OpenAlexW4386837248
LanguageEN
Citations received1
References cited95

Soil phosphorus (P) is a vital nutrient that controls wetland productivity and ecological functions. However, the effects of soil P forms on P availability during wetland degradation are relatively unknown. We selected differently degraded marshes, including non‐degraded marsh (NDM), lightly degraded marsh (LDM), moderately degraded marsh (MDM), and heavily degraded marsh (HDM), to research the changes in soil P forms by sequential chemical extraction and its regulation on P availability in the Zoige Plateau, China. The results showed that compared with the 0–30 cm soil layers of NDM, the main changes in total P concentration were a significant increase of 31.6%–44.2% in LDM and MDM, and the available P concentration increased by 28.7%–76.2% in LDM and MDM but decreased by 4.0%–47.5% in HDM with a lower P activation coefficient. Marsh degradation increased the concentration of soil dicalcium phosphates, P occluded in iron hydroxides, and organic P from the entire profile by 46.7%–137.7%, 31.7%–49.3%, and 78.1%–82.1%, respectively, while it decreased that of iron oxide surface adsorbed P and apatite P by 17.2%–32.2% and 15.3%–27.8%, respectively. Soil available P was mainly related to organic P and P non‐occluded in iron oxide minerals, which might also be a non‐negligible direct source of available P. The transformation from apatite P to organic P was an important regulatory mechanism of P availability in soils during marsh degradation. This study revealed the transformation trajectory of soil P forms owing to soil desiccation accompanied by plant community changes and overgrazing during alpine marsh degradation, and the risk of P limitation in HDMs with low soil available P. For degraded marsh restoration, some measures for improving P availability should be implemented in the future, such as grazing exclusion and the application of organic fertilizer

Biology · Marsh · Nutrient · Phosphorus · Salt marsh · Soil water · Wetland · Chemistry · Coastal wetland ecosystem dynamics · Environmental Science · Soil and Water Nutrient Dynamics · Ecology · Environmental Chemistry · Soil Science

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