Mitigating Nitrous Oxide Emissions from Tea Field Soil Using Bioaugmentation with a Trichoderma viride Biofertilizer

Figure 3

Variations in soil concentrations of (a) NH₄⁺-N and (b) NO₃⁻-N in tea fields during 2010-2012 (CK0: unfertilized; RMH225: raw materials applied at 225 kg N ha⁻¹ yr⁻¹; RMH113: raw materials applied at 113 kg N ha⁻¹ yr⁻¹; BFH225: biofertilizer applied at 225 kg N ha⁻¹ yr⁻¹; BFH113: biofertilizer applied at 113 kg N ha⁻¹ yr⁻¹; CNH450: urea applied at 450 kg N ha⁻¹ yr⁻¹; and CNH225: urea applied at 225 kg N ha⁻¹ yr⁻¹).

(a)

(b)