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Some thoughts on the biogeochemical cycling of potassium in terrestrial ecosystems

Biogeochemistry, 2021-06, Vol.154 (2), p.427-432 [Peer Reviewed Journal]

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Title:
Some thoughts on the biogeochemical cycling of potassium in terrestrial ecosystems
Author: Schlesinger, William H.
Subjects: Agriculture ; Biogeochemistry ; Biogeosciences ; Earth and Environmental Science ; Earth Sciences ; Ecosystems ; Environmental Chemistry ; Fertilizer applications ; Fertilizers ; Life Sciences ; Natural vegetation ; Net Primary Productivity ; Potassium ; Primary production ; Soil ; Terrestrial ecosystems ; Terrestrial environments ; Tropical climate ; Tropical environments ; Tropical soils
Is Part Of: Biogeochemistry, 2021-06, Vol.154 (2), p.427-432
Description: Potassium presents a conundrum for biogeochemists. Potassium is cycled wastefully at the plant level, but it appears to be conserved in the nutrient budgets of entire ecosystems, where it sometimes limits net primary productivity. An increasing demand for K fertilizer may accompany the expansion of agriculture into highly weathered tropical soils, where limited supplies of K may control the distribution and productivity of natural vegetation. However, the molar ratios of 4.6 for N/K in herbaceous plants, 17.3 in current global fertilizer applications, and 0.33 in the commodity price of fertilizer suggest that N is vastly overused and K is vastly over-priced in modern agriculture.
Publisher: Cham: Springer International Publishing
Language: English
Identifier: ISSN: 0168-2563
EISSN: 1573-515X
DOI: 10.1007/s10533-020-00704-4
Source: ProQuest Central

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