Plant and Soil

, Volume 107, Issue 1, pp 69–80 | Cite as

Differential phytotoxicity among species and cultivars of the genus Brassica to wheat

II. Activity and persistence of water-soluble phytotoxins from residues of the genus Brassica
  • W. Mason-Sedun
  • R. S. Jessop
Article

Abstract

Classhouse and laboratory studies were conducted to investigate the effect of microorganisms on the activity of water-soluble phytotoxins from Brassica residues, and on the persistence of the phytotoxins. Warm temperatures (20–24°C) and long incubation periods (20 to 40 days) were conductive to reduced phytotoxicity while low temperatures (0–4°C, regardless of incubation time), or short incubation time (regardless of temperature) resulted in levels of phytotoxicity similar to that found without incubation. The removal of microbial populations by micro-filtration resulted in the maintenance of phytotoxicity, regardless of the incubation conditions. The quantity of residues or extracts from residues used in a pot experiment and the soil type (sand or clay soil) determined the degree of phytotoxicity. Generally, the greater the quantity of residues or extracts, the greater the toxicity, with residues being more toxic than extracts from the same rate of residue. These observations agree with the general literature that the level of toxicity is determined by the quantity of residue present, and the rate of decline in the toxicity of water-soluble toxins is dependent on the microbial populations present, and their level of activity.

Key words

Brassica crop residues phytotoxins 

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References

  1. Bell D T and Muller C H 1973 Dominance of California annual grasslands byB. nigra. Am. Midland Naturalist 90, 277–299.Google Scholar
  2. Guenzi W D, McCalla T M and Norstadt F A 1967 Presence and persistence of phytotoxic substances in wheat, oat, corn and sorghum residues. Agron. J. 59, 163–165.Google Scholar
  3. Harper S H T and Lynch J M 1982 The role of water-soluble components in phytotoxicity from decomposing straw. Plant and Soil 65, 11–17.CrossRefGoogle Scholar
  4. Horricks J 1969 Influence of rape residue on cereal production. Can. J. Plant Sci. 49, 632–634.Google Scholar
  5. Kimber R W L 1967 Phytotoxicity from plant residues. I. The influence of rotted wheat straw on seedling growth. Aust. J. Agric. Res. 18, 361–374.CrossRefGoogle Scholar
  6. Kimber R W L 1973 Phytotoxicity from plant residues. II. The effect of time of rotting straw from grasses and legumes on the growth of wheat seedlings. Plant and Soil 38, 347–361.Google Scholar
  7. McCalla T M and Norstadt F A 1974 Toxicity problems in mulch tillage. Agric. and Envir. 1, 153–174.Google Scholar
  8. Mason-Sedun W, Jessop R S and Lovett J L 1986 Differential phytotoxicity among species and cultivars of the genus Brassica to wheat. 1. Laboratory and field screening species. Plant and Soil 93, 3–16.CrossRefGoogle Scholar
  9. Oschwald W R (Ed.) 1978 Crop Residue Management Systems. ASA Special Publication No. 31. Am. Soc. Agron., Madison Wisconsin. p. 185.Google Scholar
  10. Parr J F and Papendick R I 1978 Factors affecting the decomposition of crop residues by microorganisms.In Crop Residue Management Systems. Ed, W R Oschwald, pp 101–129. ASA Special Publication No. 31. Am. Soc. Agron., Madison, Wisconsin.Google Scholar
  11. Patrick Z A 1971 Phytotoxic substances associated with the decomposition in soil of plant residues. Soil Sci. 111 13–18.Google Scholar
  12. Rice E L 1984 Allelopathy. Monograph (Second Edition) Physiological Ecology Service, Academic Press, New York. 440 p.Google Scholar
  13. Yakle G A and Cruse R M 1983 Corn plant residue age and placement effects upon early corn growth. Can. J. Plant Sci. 63, 871–877.Google Scholar

Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • W. Mason-Sedun
    • 1
  • R. S. Jessop
    • 1
  1. 1.Department of Agronomy and Soil ScienceUniversity of New EnglandArmidaleAustralia

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