An evaluation of plant-borne factors promoting the solubilization of alkaline rock phosphates
0106 biological sciences
2. Zero hunger
fixation
Rock phosphate solubilization
Alkaline uptake pattern
04 agricultural and veterinary sciences
Acidic uptake pattern
15. Life on land
Rhodes grass
NO3
01 natural sciences
Maize
Field bean
Symbiotic N2
nutrition
NH4
Rape
0401 agriculture, forestry, and fisheries
Ryegrass
Buckwheat
DOI:
10.1007/bf02369971
Publication Date:
2006-04-08T13:14:26Z
AUTHORS (5)
ABSTRACT
Four experiments are described in which the uptake patterns of various crop species were shown to enhance the solubilization of alkaline rock phosphates. In most cases, such enhancements resulted from soil acidification brought about by the alkaline uptake patterns. In one case, the enhancement may have stemmed primarily from a high Ca-uptake rate, which might be responsible for a shift in mass-action equilibria favoring the solubilization of rock phosphates. High uptake of Ca is expected to serve two purposes: 1. it acts in creating alkaline uptake patterns causing a decline in soil pH, and 2. it promotes a shift in mass-action equilibria.
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