Abstract
Pot experiments were conducted, with ryegrass (Lolium perenneL.) maize (Zea mays L ND60) and pak-choi (Brassica campestrisL. ssp.chinensis (L.) Mokina. var. cammunis Tsen et Lee, cv. Wuyueman), to investigate plant mobilization of mineral K in gneiss and feldspar under P-deficient conditions. For both pak-choi and maize grown in gneiss, P-starvation led to a significant increase in K concentration in their shoots, and the net release of K from the mineral K pool was significantly enhanced when the crops grew in feldspar. The enhanced mobilization of mineral K might be attributed to the release of organic acids from the plant roots. When gneiss of various particle sizes was exposed to malic and tartaric acids, both acids had a direct positive influence on the release of mineral K from gneiss. More release of K was observed with increasing concentration of both organic acids, much more so for finer particle size fractions.
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References
Chou L & Wollast R (1985) Steady-state kinetics and dissolution mechanisms of albite. Am J Sci 285: 963–993
Gardner W, Parbery DG & Barber DA (1982) The acquisition of phosphorus by Lupinus albus L. I: some characteristics of the soil/root interface. Plant Soil 68: 19–32
Grierson PF (1992) Organic acids in the rhizosphere of Banksia integrifolia L. Plant Soil 144: 259–265
Hinsinger P, Jaillard B & Dufey JE (1992) Rapid weathering of a trioctahedal mica by the roots of ryegrass. Soil Sci Soc Am J 65: 977–982
Hinsinger P & Jaillard B (1993) Root-induced release of interlayer potassium and vermiculitization of phlogopite as related to potassium depletion in the rhizosphere of ryegrass. J Soil Sci 44: 525–534
Hinsinger P, Elsass F, Jaillard B & Robert M (1993) Root-induced irreversible transformation of a trioctahedal mica in the rhizosphere of rape. J Soil Sci 44: 535–545
Hoffland E, Finedenegg GR & Nelemans JA (1989) Solubilization of rock phosphate by rape. II: Local root exudation of organic acids as a response to P-starvation. Plant Soil 113: 161–165
Huang WH & Kiang WC (1972) Laboratory dissolution of plagioclase feldspar in water and organic acids at room temperature. Am Mineral 57: 1849–1859
Moorby H, White RE & Nye PH (1988) The influence of phosphate nutrition on H ion efflux from roots of young rape plants. Plant Soil 105: 247–256
Song SK & Huang PM (1988) Dynamics of potassium release from potassium-bearing minerals as influenced by oxalic and citric acids. Soil Sci Soc Am J 52: 383–390
Sparks DL (1987) Potassium dynamics in soils. Adv Soil Sci 6: 1–63
Rausell-Colom JA, Sweatman TR, Wells CB & Norrish K (1965) Studies in the artificial weathering of mica. In: Hallsworth EG & Crawford (eds) Experimental Pedology, pp 40–72. Butterworths, London
Robert M & Berthelin J (1986) Role of biological and biochemical factors in soil mineral weathering. In: Huang PM & Schnitzer M (eds) Interaction of Soil Minerals with Natural Organics and Microbes, pp 453–496, SSSA Spec. Pub. No. 17
Wang JG, Zhang FS, Cao YP & Zhang XL (2000) Effect of plant types on release of mineral K from gneiss. Nutr Cycl Agroecosys 56: 37–44 (this issue)
Zhang FS, Ma J & Cao YP (1997) Phosphorus deficiency enhances root exudation of low-molecular weight organic acids and utilization of sparsely soluble inorganic phosphates by radish (Raghaus satiuvs L.) and rape (Brassica napus L.) plants. In: Ando et al. (eds) Plant Nutrition for Sustainable Food Production and Environment, pp 301–304, Kluwer Academic Publishers, Dordrecht, The Netherlands
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Wang, J., Zhang, F., Zhang, X. et al. Release of potassium from K-bearing minerals: Effect of plant roots under P deficiency. Nutrient Cycling in Agroecosystems 56, 45–52 (2000). https://doi.org/10.1023/A:1009894427550
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DOI: https://doi.org/10.1023/A:1009894427550