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

Environmental Science and Pollution Research International
Mingzhen MaNianpeng He

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 sim...Continue Reading

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Jan 27, 2010·Ecology Letters·L ChengS Hu
Oct 22, 2013·Journal of Plant Physiology·Christian ZörbEdgar Peiter
Jul 6, 2014·Breeding Science·Xuekun ZhangTakeshi Nishio

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Citations

Jul 16, 2019·Environmental Science and Pollution Research International·Ruxue GaoYoujin Yan
Aug 15, 2021·Journal of Environmental Management·Wenchao ZhangYonggan Zhao

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