Table 2.

MPN counts of bacteria in anoxic soil of two flooded rice paddy soil microcosmsa

SubstrateAdditionCell count (per g of dry soil)95% Confidence intervalStrain isolated in pure culture
LactateNone7.5 × 1061.3 × 106–3.7 × 107
M. hungatei7.5 × 1081.3 × 108–3.7 × 109Sporomusasp. strain DR1/8
LactateNone5.0 × 1069.8 × 105–2.1 × 107
M. hungatei1.1 × 1072.1 × 106–4.0 × 107
EthanolNone2.9 × 1065.6 × 105–1.1 × 107
M. hungatei2.3 × 1065.0 × 105–7.8 × 106Sporomusasp. strain DR15
EthanolNone3.4 × 1071.1 × 107–8.2 × 107
M. hungatei1.3 × 1083.0 × 107–3.6 × 108
  • a One soil sample from each microcosm was used for two dilution series on each substrate, one of which containedM. hungatei in all tubes.