An evaluation of plant-borne factors promoting the solubilization of alkaline rock phosphates |
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| Authors: | T Bekele B J Cino P A I Ehlert A A Van Der Maas A Van Diest |
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| Institution: | (1) Department of Soil Science and Plant Nutrition, Agricultural University, Wageningen, The Netherlands |
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| Abstract: | Summary 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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| Keywords: | Acidic uptake pattern Alkaline uptake pattern Buckwheat Field bean Maize NH4 nutrition NO3 nutrition Rhodes grass Rape Rock phosphate solubilization Ryegrass Symbiotic N2 fixation |
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