Nitrogen Fertilizer and Nitrapyrin for Greenhouse Gas Reduction in Wolfberry Orchards on the Qinghai–Tibetan Plateau

Wolfberry production has become a major agro-industry on the Qinghai–Tibetan Plateau, causing increased nitrogen (N) pollution and greenhouse gas (GHG) emissions. Appropriate N fertilizer rate nitrification inhibitors may mitigate GHG emissions improve use efficiency. A 2-year field experiment was conducted to measure effects of application nitrapyrin emissions, reduce pollution. We used eight treatments: Control (CK), 667 kg·ha−1 (Con), 400 (N400), 267 (N267), 133 (N133), plus 2.00 (N400I2.00), 1.33 (N267I1.33) 0.67 (N133I0.67). Compared with Con treatment, N400 maintained fruit yield net income, but saved 40% decreased cumulative N2O emission by 14–16%. N400, N267 N133 treatments, N400I2.00, N267I1.33 N133I0.67 treatments reduced 28.5–45.1%, 26.6–29.9% 33.8–45.9%, respectively. Furthermore, N400I2.00 resulted in highest wolfberry income. The CH4 CO2 were not significantly different among treatments. Moreover, global warming potential (GWP) intensity (GHGI) declined 45.6% 48.6% compared treatment. Therefore, combined shown be promising management technique for maintaining while minimizing GWP GHGI.