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This article in SSSAJ

  1. Vol. 38 No. 4, p. 591-594
     
    Received: Jan 2, 1974
    Published: July, 1974


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doi:10.2136/sssaj1974.03615995003800040021x

Microbial Growth Rate in Glucose-Amended Soil1

  1. B. Behera and
  2. G. H. Wagner2

Abstract

Abstract

Microbial growth in soil amended with glucose was evaluated. Following the incorporation of glucose into soil, rapid evolution of CO2 occurred and was accompanied by a similar increase in bacterial numbers. It appeared that the amendment was utilized primarily by bacteria and was wholly expended within the first 2 days of incubation. Subsequently fungal growth was noted at the time the bacterial count declined. The developing bacterial population followed the typical sigmoid growth curve and a minimum generation time of 2 hours was obtained during the period 5 to 10 hours after adding the glucose. It was determined that the yield coefficient of bacteria produced relative to substrate consumed was 0.39 g of cell C/g substrate C. The energy expended by the population for functions other than production of new cell material, referred to as specific maintenance, was estimated to be 0.0036 hour-1.

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