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The transport of potassium to ryegrass roots in soils with and without added potassium

Published online by Cambridge University Press:  27 March 2009

T. M. Addiscott  and
O. Talibudeen
T. M. Addiscott
Affiliation:
Rothamsted Experimental Station, Harpenden
O. Talibudeen
Affiliation:
Rothamsted Experimental Station, Harpenden
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Summary

The mechanisms responsible for moving K from soil to root were studied by growing perennial ryegrass in pots containing a flinty silt loam from Rothamsted and a sandy Woburn soil, with and without added K, at 0.75 water-holding capacity. More water was taken up from the Rothamsted soil than from the Woburn soil, and less was taken up when K was added without affecting dry-matter production. After 25, 52, 83, 122, 194 and 276 days, K uptake, water uptake and the K concentration in the soil solution were measured and the mass-flow contributionto K uptake calculated.

Without added K, mass-flow accounted for only about one-sixth of the K taken up from the Rothamsted soil and about one-third from the Woburn soil. Except at first, diffusion probably accounted for the remainder of uptake but was the rate-controlling step for uptake from the Woburn soil only. With added K, mass-flow became much more important relative to diffusion in both soils, and transported more than enough K to account for the measured K uptake. Root interception probably did not contribute to K uptake after the early part of the experiment, because the pots used were small.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 76 , Issue 3 , June 1971 , pp. 411 - 418
Copyright
Copyright © Cambridge University Press 1971

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References

REFERENCES

Addiscott, T. M. (1970). The uptake of initially available soil potassium by ryegrass. J. agric. Sci., Camb. 74, 123–9.CrossRefGoogle Scholar
Arnold, P. W. & Close, B. M. (1961). Potassiumreleasing power of soils from the Agdell rotation experiment assessed by glasshouse cropping. J. agric. Sci., Camb. 57, 381–6.Google Scholar
Bagshaw, R. G., Vaidyanathan, L. V. & Nye, P. H. (1969). An evaluation of the properties of soil potassium influencing its supply by diffusion to plant roots in. soil. J. agric. Sci., Camb. 73, 1–14.Google Scholar
Blanchet, R., Bosc, M. & Maertens, C. (1970). Some interactions of cation nutrition and the water supply of plants. VII Colloq. Int. Potash Inst., Tel Aviv, 1969, Potash Rev. Subject 6, 31st Suite, pp. 8–10.Google Scholar
Crank, J. (1956). The Mathematics of Diffusion, pp. 30–1. Oxford: Clarendon Press.Google Scholar
Drew, M. C., Vaidyanathan, L. V. & Nye, P. H. (1966). Can soil diffusion limit the uptake of potassium by Plants? Trans. Comms. II and IV, Int. Soc. Soil Sci., Aberdeen, pp. 335–44.Google Scholar
Drew, M. C., Nye, P. H. & Vaidyanathan, L. V. (1969). The supply of nutrient ions by diffusion to plant roots in soil. I. Adsorption of potassium by cylindrical roots of onion and leek. Pl. Soil 30, 252–70.Google Scholar
Drew, M. C. & Nye, P. H. (1969). The supply of nutrientions by diffusion to plant roots in soil. II. The effect of root hairs on the uptake of potassium by roots of ryegrass (Lolium multiflorium). Pl. Soil 31, 407–24.Google Scholar
Graham-Bryce, I. J. (1963). Self-diffusion of ions in the soil. I. Cations. J. Soil Sci. 14, 188–94.Google Scholar
Halstead, E. H., Barber, S. A., Warnecke, D. D. & Bole, J. B. (1968). Supply of Ca, Sr, Mn and Zn to plant roots growing in soil. Proc. Soil Sci. Soc. Am. 32, 69–72.CrossRefGoogle Scholar
Islam, M. A. & Bolton, J. (1971). The effect of soil pH on potassium intensity and release of non-exchangeable potassium to ryegrass. J. agric. Sci., Camb. 75, 571–76.CrossRefGoogle Scholar
Lewis, D. G. & Quirk, J. P. (1967). Phosphate diffusion in soil and uptake by plants. IV. Computed uptake by model roots as a result of diffusion flow. Pl. Soil 26, 454–68.CrossRefGoogle Scholar
Nye, P. H. (1968). Processes in the root environment. J. Soil Sci. 19, 205–15.Google Scholar
Oliver, S. & Barber, S. A. (1966 a). An evaluation of the mechanisms governing the supply of Ca, Mg, K and Na to soybean roots (Glycine max). Proc. Soil Sci. Soc. Am. 30, 82–89.CrossRefGoogle Scholar
Oliver, S. & Barber, S. A. (1966 b). Mechanism for the movement of Mn, Fe, B, Cu, Zn, Al and Sr from one soil to the surface of soybean roots. Proc. Soil Sci. Soc. Am. 30, 468–70.Google Scholar
Olsen, S. R., Kemper, W. D. & Jackson, R. D. (1962). Phosphate diffusion to plant roots. Proc. Soil Sci. Soc. Am. 26, 222–7.Google Scholar
Omanwar, P. K. & Robertson, J. A. (1970). Movement of phosphorus to barley roots growing in soil. Can. J. Soil Sci. 50, 57–64.CrossRefGoogle Scholar
Rothamsted Experimental Station (1968). Field Experiments and Work of the Departments, 79 pp. Harpenden.Google Scholar
Talibudeen, O. & Dey, S. K. (1968). Potassium reserves in British soils. I. The Rothamsted Classical experiments. J. agric. Sci., Camb. 71, 95–104.CrossRefGoogle Scholar
Talibudeen, O. & Weir, A. (in the Press). Potassium reserves in a Harwell Series soil. J. Soil Sci.Google Scholar