Effect of temperature on soil microbial biomass, enzyme activities, and PLFA content during incubation period of soil treated with organic materials

摘要

This study was carried to evaluate the effect of temperature on soil microbial biomass, enzyme activities, and phospholipid fatty acid(PLFA) content during incubation period of volcanic (VAS)and non-volcanic ash soil(NVAS) treated with organic materials such as 2 types mixed pellet(OFPL) and powder organic fertilizers(OFPD), pig manure compost(PMC), and food waste compost(FWC). Soil microbial biomass N was high in NVAS treated with organic fertilizers and in VAS treated with PMC and FWC, respectively. At 75 days, PLFA content was higher in NVAS than in VAS. Urease activity in NVAS treated with OFPL followed the order of 10°C(75.0)>20°C(16.3)>30°C(4.6 ug NH4-N/g/2h) at 150 days. It was decreased gradually at the high temperature and with time. Glucosidase activity was higher in NVAS than in VAS. The correlation coefficient between soil microbial biomass C and microbial activity indicators showed that PLFA was highly significant at r=0.91 in NVAS and for glucosidase was r=0.83 in VAS. Soil microbial activities showed differences in sensitivities depending on soil type and temperature.