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Plant and Soil

, Volume 54, Issue 2, pp 249–258 | Cite as

The decomposition of tylosin fermentation waste in soil at four temperatures

  • M. W. M. Bewick
  • H. T. Tribe
Article
  • 18 Downloads

Summary

Aerobic decomposition of tylosin fermentation waste was studied by O2 uptake and CO2, NH4+ and NO3 release over 10 weeks in a light compost-soil at 3 concentrations and 4 temperatures. Comparisons of O2 uptake and CO2 release at each temperature showed that aerobic conditions were maintained in the system. Maximal rates of respiration (C mineralization) increased with temperature. At 23°C 50% of the substrate C had been mineralized in 10 weeks. At 10–15°C and at 4°C C mineralization was approximately 38% and 22% respectively. Except at 4°C mineralization had almost ceased within 10 weeks. There was evidence of a permanent inhibition of C mineralization at 10–15°C compared with 23°C, and a temporary inhibition at 10°C compared with 15°C.

At 10 weeks 25% of the N had been mineralized at 23, 15 and 10°C, while 14% had been mineralized at 4°C. The time taken to reach maximum N mineralization was reduced by increase in temperature and by 10 weeks mineralization had almost ceased at 15 and 23°C. In terms of the fertilizing effect of tylosin fermentation, 25% of the total N was available within 10 weeks at 10–23°C. Nitrification was strongly inhibited at 4 and 10°C. Both C and N mineralization were in direct proportion to the concentration of tylosin fermentation waste added to the soil.

Key Words

Antibiotic Fermentation Microbial respiration Mineralization Nitrification Temperature Tylosin Waste 

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Copyright information

© Martinus Nijhoff Publishers 1980

Authors and Affiliations

  • M. W. M. Bewick
    • 1
  • H. T. Tribe
    • 1
  1. 1.Department of Applied BiologyUniversity of CambridgeCambridge

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