Migration and leaching characteristics of base cation: indicating environmental effects on soil alkalinity in a karst area

A - Papers appearing in refereed journals

Ma, M., Gao, Y., Song, X., Green, S. M., Xiong, B., Dungait, J. A. J., Peng, T., Quine, T. A., Wen, X. and He, N. 2018. Migration and leaching characteristics of base cation: indicating environmental effects on soil alkalinity in a karst area. Environmental Science and Pollution Research. 25 (21), pp. 20899-20910. https://doi.org/10.1007/s11356-018-2266-x

AuthorsMa, M., Gao, Y., Song, X., Green, S. M., Xiong, B., Dungait, J. A. J., Peng, T., Quine, T. A., Wen, X. and He, N.
Abstract

In karst areas, rock dissolution often results in the development of underground networks, which act as subterranean pathways for rapid water and nutrient (and possibly soil) loss during precipitation events. Loss of soluble nutrients degrades surface soils and decreases net primary productivity, so it is important to establish flow pathways and quantify nutrient loss during rainfall events of different magnitudes. We conducted a simulated rainfall experiment in karst and nonkarst areas to compare the concentration of nutrients in surface and subsurface flow water and effects on soil alkalinity in three lithologic soil formations under five different rainfall intensity treatments. Compared with the nonkarst area, the runoff in subsurface flows and the proportion of nutrient loss in the subsurface flow are larger in the karst area and less affected by rain intensity. The maximum loss loads of calcium (Ca2+) and magnesium (Mg2+) ions were 32.9 and 19.8 kg ha−1, respectively. With the estimate of base cation loss loads in the China southern karst area under the rainfall intensity of 45 mm h−1, more than 80% of the base cation loss load occurred in the limestone karst area. Although the alkalinity leaching value in nonkarst was similar to that in the karst area under simulated rainfall conditions, its impact on the ecological environment was quite different.

Year of Publication2018
JournalEnvironmental Science and Pollution Research
Journal citation25 (21), pp. 20899-20910
Digital Object Identifier (DOI)https://doi.org/10.1007/s11356-018-2266-x
Open accessPublished as non-open access
FunderNational Natural Science Foundation of China
Output statusPublished
Publication dates
Online15 May 2018
Publication process dates
Accepted07 May 2018
ISSN16147499
PublisherSpringer Nature
Grant ID41571130043
31570465
Copyright licensePublisher copyright

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