100073 Temporal Changes of Nitrification and Nitrifying Microbes Induced By Dicyandiamide Application to a Soil Applied with Anaerobic Digestion Effluents.
Poster Number 177-431
See more from this Division: SSSA Division: Soil Biology and Biochemistry
See more from this Session: Soil Biology and Biochemistry Poster I (includes student competition)
Abstract:
A soil used in this study was Typic Dystrochrept (Tokyo, Japan), oven-dried, and sieved by 2 mm. The ADEs were derived from food waste (FW), cow manure (CM), and sewage water (SW) digestion plant, and applied as 140 kg N ha-1 based on N recommended rate for Japanese mustard spinach (Brassica rapa). Dicyandiamide (DCD) was used as nitrification inhibitor, applied at 10% of total N applied from chemical fertilizer (CF) or ADE. Nine treatments were included: no amendments, CF only, ADEs only (FW, CM or SW), CF with DCD (CF+DCD), and ADEs with DCD (FW+DCD, CM+DCD or SW+DCD). Soil NH4+-N, NO3--N, and pH were analyzed on 0, 3, 7, 14, 21, 28, 42 and 56 day, and AOB and AOA abundance were analyzed on 0, 7, 14, 28 and 56 day of the incubation.
High NH4+-N and low NO3--N in the soil are expected accordingly to decreased AOB and AOA abundance in the soil applied with DCD.
See more from this Division: SSSA Division: Soil Biology and Biochemistry
See more from this Session: Soil Biology and Biochemistry Poster I (includes student competition)