Keywords :
Vertical Structure,
Phyllosphere Fungal,
Tropical Forest,
High-Throughput Sequencing
บทคัดย่อ :
An incubation experiment was conducted to test the effects of inorganic phosphorus (P) addition on soil
microbial activities in tropical monoculture tree plantation soils. The soils taken from an experimental
tree plantation site in Nakhon Ratchasima, Thailand were incubated for 48 h with and without adding
100 mg of P (KH2PO4) per gram soil after adjusting the water holding capacity to 80%. During the incu-
bation period, the microbial biomass carbon (MBC) contents determined using the chloroform fumiga-
tion extraction method decreased and P addition stimulated the decreased rate significantly. On the
other hand, the P addition increased the dissolved organic carbon (DOC) contents and CO2 emissions. The
study suggested that P addition had changed soil microbial activities, possibly including a soil microbial
community change. Furthermore, the study showed that the stimulated soil respiration by P addition is
not necessarily accompanied by increased MBC. The assessment of the effects of P limitation on soil
microbial activities should measure at least the effects of P addition on both soil respiration and MBC,
possibly combined with soil microbial community analyses.
เอกสารอ้างอิง :
Mori, T., Wachrinrat, C., Staporn, D., Meunpong, P., Suebsai, W., Matsubara, K., ... & Boonman, K. (2016a). Contrastive effects of inorganic phosphorus addition on soil microbial respiration and microbial biomass in tropical monoculture tree plantation soils in Thailand. Agriculture and Natural Resources, 50(5), 327-330.
