Plant and Soil

, Volume 77, Issue 1, pp 15–28 | Cite as

Effect of soil compaction on root growth and uptake of phosphorus

  • J. Shierlaw
  • A. M. Alston
Article

Summary

Zea mays L. andLolium rigidum Gaud. were grown for 18 and 33 days respectively in pots containing three layers of soil each weighing 1 kg. The top and bottom layers were 100 mm deep and they had a bulk density of 1200 kg m−3, while the central layer of soil was compacted to one of 12 bulk densities between 1200 and 1750 kg m−3. The soil was labelled with32P and33P so that the contribution of the different layers of soil to the phosphorus content of the plant tops could be determined. Soil water potential was maintained between −20 and −100 kPa.

Total dry weight of the plant tops and total root length were slightly affected by compaction of the soil, but root distribution was greatly altered. Compaction decreased root length in the compacted soil but increased root length in the overlying soil. Where bulk density was 1550 kg m−3, root length in the compacted soil was about 0.5 of the maximum. At that density, the penetrometer resistance of the soil was 1.25 and 5.0 MPa and air porosity was 0.05 and 0.14 at water potentials of −20 and −100 kPa respectively, and daytime oxygen concentrations in the soil atmosphere at time of harvest were about 0.1 m3m−3. Roots failed to grow completely through the compacted layer of soil at bulk densities ≥ 1550 kg m−3. No differences were detected in the abilities of the two species to penetrate compacted soil.

Ryegrass absorbed about twice as much phosphorus from uncompacted soil per unit length of root as did maize. Uptake of phosphorus from each layer of soil was related to the length of root in that layer, but differences in uptake between layers existed. Phosphorus uptake per unit length of root was higher from compacted than from uncompacted soil, particularly in the case of ryegrass at bulk densities of 1300–1500 kg m−3.

Key words

Annual ryegrass Lolium rigidum Maize Penetrometer resistance32P33Phosphorus uptake Soil aeration Soil compaction Root growth Zea mays 

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References

  1. 1.
    Atkins C A and Pate J S 1977 An IRGA technique to measure CO2 content of small volumes of gas from internal atmospheres of plant organs. Photosynthetica 11, 214–216.Google Scholar
  2. 2.
    Barley K P 1953 The root growth of irrigated perennial pastures and its effect on soil structure. Aust. J. Agric. Res. 4, 283–291.Google Scholar
  3. 3.
    Boone F R and Veen B W 1982 The influence of mechanical resistance and phosphate supply on morphology and function of maize roots. Neth. J. Agric. Sci. 30, 179–192.Google Scholar
  4. 4.
    Colwell J D 1965 An automatic procedure for the determination of phosphorus in sodium hydrogen carbonate extracts of soils. Chem. Ind. (Lond.) 1965, 893–895.Google Scholar
  5. 5.
    Crossett R N, Campbell D J and Stewart H E 1975 Compensatory growth in cereal root systems. Plant and Soil 42, 673–683.Google Scholar
  6. 6.
    Dexter A R and Hewitt J S 1978 The deflection of plant roots. J. Agric. Engng. Res. 23, 17–22.Google Scholar
  7. 7.
    Drew M C and Nye P H 1970 The supply of nutrient ions by diffusion to plant roots in soil. III. Uptake of phosphate by roots of onions, leek and ryegrass. Plant and Soil 33, 545–563.Google Scholar
  8. 8.
    Edwards W M, Fehrenbacher J B and Vavra J P 1964 The effect of discrete ped density on corn root penetration in a planosol. Soil Sci. Soc. Am. Proc. 28, 560–564.Google Scholar
  9. 9.
    Elkins C B, Haaland R L and Hoveland C S 1977 Grass roots as a tool for penetrating soil hardpans.In Proc. 34th South. Pasture Forage Crops Improv. Conf., Auburn, Alabama, pp 21–26.Google Scholar
  10. 10.
    Gooderham P T 1977 Some aspects of soil compaction, root growth and crop yield. Agric. Prog. 52, 33–44.Google Scholar
  11. 11.
    Goss M J 1977 Effects of mechanical impedance on root growth in barley (Hordeum vulgare L.) I. Effects on the elongation and branching of seminal root axes. J. Exp. Bot. 28, 96–111.Google Scholar
  12. 12.
    Grable A R and Siemer E G 1968 Effects of bulk density, aggregate size and soil water suction on oxygen diffusion, redox potentials and elongation of corn roots. Soil Sci. Soc. Am. Proc. 32, 180–186.Google Scholar
  13. 13.
    Greenwood D J 1970 Soil aeration and plant growth. Rept. Prog. Appl. Chem. 55, 423–431.Google Scholar
  14. 14.
    Hanson W C 1950 The photometric determination of phosphorus in fertilizers using the phosphovanado-molybdate complex. J. Sci. Food Agric. 1, 172–173.Google Scholar
  15. 15.
    Jordan H V, Crockett S P and Bardsley C E 1956 Some effects of kudzu versus continuous corn on soil properties and crop yields. Soil Sci. Soc. Am. Proc. 20, 225–227.Google Scholar
  16. 16.
    Kemper W D, Stewart B A and Porter L K 1971 Effects of compaction on soil nutrient status.In Compaction of Agricultural Soils. Am. Soc. Agric. Engrs., St. Joseph, Michigan, pp 178–179.Google Scholar
  17. 17.
    L'Annunziata M F 1979 Liquid scintillation counting.In Radioisotopes in Agricultural Chemistry. Academic Press, London, pp 89–145.Google Scholar
  18. 18.
    Larsen S 1952 The use of32P in studies on the uptake of phosphorus by plants. Plant and Soil 4, 1–10.Google Scholar
  19. 19.
    Nye P H and Tinker P B 1968 Solute Movement in the Soil-Root System. Blackwell, Oxford, pp 78–79.Google Scholar
  20. 20.
    Phillips R E and Brown D A 1965 Ion diffusion. III. The effect of soil compaction on self diffusion of rubidium-86 and strontium-89. Soil Sci. Soc. Am. Proc. 29, 657–661.Google Scholar
  21. 21.
    Richards S J 1965 Soil suction measurements with tensiometers.In Methods of Soil Analysis, Part 1. Ed. C A Black, Am. Soc. Agron., Madison, Wisconsin, pp 153–163.Google Scholar
  22. 22.
    Russell R S and Goss M J 1974 Physical aspects of soil fertility — the response of roots to mechanical impedance. Neth. J. Agric. Sci. 22, 305–318.Google Scholar
  23. 23.
    Schuurman J J and de Boer J J H 1974 The effect of soil compaction at various depths on root and shoot growth of oats. Neth. J. Agric. Sci. 22, 133–142.Google Scholar
  24. 24.
    Soane B D, Dickson J W and Campbell D J 1982 Compaction by agricultural vehicles: a review. III. Incidence and control of compaction in crop production. Soil Till. Res. 2, 3–36.Google Scholar
  25. 25.
    Tackett J L and Pearson R W 1964 Oxygen requirements of cotton seedling roots for penetration of compacted soil cores. Soil Sci. Soc. Am. Proc. 28, 600–605.Google Scholar
  26. 26.
    Tackett J L and Pearson R W 1964 Effect of carbon dioxide on cotton seedling root penetration of compacted soil cores. Soil Sci. Soc. Am. Proc. 28, 741–743.Google Scholar
  27. 27.
    Taylor H M and Gardner H R 1960 Relative penetrating ability of different plant roots. Agron. J. 52, 579–581.Google Scholar
  28. 28.
    Taylor H M and Gardner H R 1963 Penetration of cotton seedling taproots as influenced by bulk density, moisture content, and strength of soil. Soil Sci. 96, 153–156.Google Scholar
  29. 29.
    Taylor H M and Ratliff L F 1969 Root growth pressures of cotton, peas and peanuts. Agron. J. 61, 398–402.Google Scholar
  30. 30.
    Taylor H M and Ratliff L F 1969 Root elongation rates of cotton and peanuts as a function of soil strength and soil water content. Soil Sci. 108, 113–119.Google Scholar
  31. 31.
    Tennant D 1975 A test of a modified line intersect method of estimating root length. J. Ecol. 63, 995–1001.Google Scholar
  32. 32.
    Warkentin B P 1971 Effects of compaction on content and transmission of water in soils.In Compaction of Agricultural Soils. Am. Soc. Agric. Engrs., St. Joseph, Michigan, pp 126–153.Google Scholar
  33. 33.
    Whiteley G M 1982 Soil structure and strength factors affecting the tillage requirements of oilseed, wheat and pea crops. Ph.D. Thesis, University of Adelaide.Google Scholar
  34. 34.
    Whiteley G M and Dexter A R 1981 The dependence of soil penetrometer pressure on penetrometer size. J. Agric. Engng. Res. 26, 467–476.Google Scholar
  35. 35.
    Whiteley G M and Dexter A R 1982 Forces required to displace individual particles within beds of similar particles. J. Agric. Engng. Res. 27, 215–225.Google Scholar
  36. 36.
    Whiteley G M, Hewitt J S and Dexter A R 1982 The buckling of plant roots. Physiol. Plant. 54, 333–342.Google Scholar
  37. 37.
    Whiteley G M, Utomo W H and Dexter A R 1981 A comparison of penetrometer pressures and the pressures exerted by roots. Plant and Soil 61, 351–364.Google Scholar
  38. 38.
    Wiersum L K 1957 The relationship of the size and structural rigidity of pores to their penetration by roots. Plant and Soil 9, 75–85.Google Scholar
  39. 39.
    Wiersum L K 1962 Uptake of nitrogen and phosphorus in relation to soil structure and nutrient mobility. Plant and Soil 16, 62–70.Google Scholar
  40. 40.
    Willis W O and Raney W A 1971 Effects of compaction on content and transmission of heat in soils.In Compaction of Agricultural Soils. Am. Soc. Agric. Engrs., St. Joseph, Michigan, pp. 165–177.Google Scholar

Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers 1984

Authors and Affiliations

  • J. Shierlaw
    • 1
  • A. M. Alston
    • 1
  1. 1.Department of Soil Science, Waite Agricultural Research InstituteThe University of AdelaideGlen Osmond

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