Fütterungsbedingte mikrobielle Zusammensetzung von Rinderkot ...

6. Effect of cattle faeces with different microbial biomass content on soil properties, gaseous
emissions and plant growth 70
soil was significantly highest when faeces of heifers were supplemented, compared with
the faeces of the other two treatments. Faeces addition generally increased N2O
emission rates. A clear increase of N2O emission occurred especially in the treatment
with faeces of high yielding cows (Fig. 1). Total N2O emission was significantly
correlated with faecal microbial biomass N (r = 0.58; P < 0.05, n = 24).
Tabelle 12 (Table 4): Microbial indices, CO2 emissions and mineral nitrogen in different soil treatments after 14 days of incubation
Table 4. Microbial indices, CO2 emissions and mineral nitrogen in different soil
treatments after 14 days of incubation
Microbial biomass Respiration
C N Ergosterol CO2-C Nmin
Soil treatment (µg g -1 soil)
Heifer 227 ab 62 a 0.64 a 246 a -8.6 a
Low yielding 261 a 71 a 0.71 a 262 a -5.5 b
High yielding 234 ab 64 a 0.67 a 330 b -4.3 b
Control 187 b 36 b 0.38 b 52 c 3.2 c
CV (±%) 14 24 18 10 26
CV = pooled coefficient of variation between feeding regimes (n = 6); different
letters indicate a significant difference (Tukey/Kramer, P < 0.05).
Abb. 9 (Fig. 1): N2O emissions from different soil treatments during 14 days of incubation at 22°C; bars indicate ± one standard error; n = 6.
Fig. 1. N2O emissions from different soil treatments during 14 days of incubation at
22°C; bars indicate ± one standard error; n = 6.