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

Author

Listed:
  • Jiujin Lu

    (Department of Agriculture and Forestry, College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
    These authors contributed equally to this work.)

  • Yunzhang Xu

    (Department of Agriculture and Forestry, College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
    State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
    These authors contributed equally to this work.)

  • Haiyan Sheng

    (Department of Agriculture and Forestry, College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China
    State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China)

  • Yajun Gao

    (State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
    College of Natural Resources and Environment, Northwest A&F University, Xinyang 712100, China)

  • Jim Moir

    (Soil Science Department, Lincoln University, Lincoln, 7647 Christchurch, New Zealand)

  • Rong Zhang

    (Qinghai Academy of Agriculture and Forestry, Xining 810016, China)

  • Shouzhong Xie

    (Nuomuhong Farm, Dulan 816100, China)

Abstract

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 and nitrification inhibitors may mitigate GHG emissions and improve N use efficiency. A 2-year field experiment was conducted to measure the effects of N application rate and nitrapyrin on GHG emissions, to reduce GHG emissions and N pollution. We used eight treatments: Control (CK), 667 kg·ha −1 N (Con), 400 kg·ha −1 N (N 400 ), 267 kg·ha −1 N (N 267 ), 133 kg·ha −1 N (N 133 ), 400 kg·ha −1 N plus 2.00 kg·ha −1 nitrapyrin (N 400 I 2.00 ), 267 kg·ha −1 N plus 1.33 kg·ha −1 nitrapyrin (N 267 I 1.33 ) and 133 kg·ha −1 N plus 0.67 kg·ha −1 nitrapyrin (N 133 I 0.67 ). Compared with Con treatment, N 400 maintained fruit yield and increased net income, but saved 40% of N fertilizer and decreased the cumulative N 2 O emission by 14–16%. Compared to N 400 , N 267 and N 133 treatments, the cumulative N 2 O emission of N 400 I 2.00 , N 267 I 1.33 and N 133 I 0.67 treatments was reduced by 28.5–45.1%, 26.6–29.9% and 33.8–45.9%, respectively. Furthermore, N 400 I 2.00 resulted in the highest wolfberry yield and net income. The emissions of CH 4 and CO 2 were not significantly different among treatments. Moreover, the global warming potential (GWP) and the greenhouse gas emission intensity (GHGI) of N 400 I 2.00 declined by 45.6% and 48.6% compared to Con treatment. Therefore, 400 kg·ha −1 N combined with 2.00 kg·ha −1 nitrapyrin was shown to be a promising management technique for maintaining wolfberry yield while minimizing GWP and GHGI.

Suggested Citation

  • Jiujin Lu & Yunzhang Xu & Haiyan Sheng & Yajun Gao & Jim Moir & Rong Zhang & Shouzhong Xie, 2022. "Nitrogen Fertilizer and Nitrapyrin for Greenhouse Gas Reduction in Wolfberry Orchards on the Qinghai–Tibetan Plateau," Agriculture, MDPI, vol. 12(7), pages 1-16, July.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:7:p:1063-:d:867348
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    References listed on IDEAS

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    1. Haoyue Wu & Hanjiao Huang & Jin Tang & Wenkuan Chen & Yanqiu He, 2019. "Net Greenhouse Gas Emissions from Agriculture in China: Estimation, Spatial Correlation and Convergence," Sustainability, MDPI, vol. 11(18), pages 1-19, September.
    2. Zhang, Guo & Wang, Xiaoke & Sun, Binfeng & Zhao, Hong & Lu, Fei & Zhang, Lu, 2016. "Status of mineral nitrogen fertilization and net mitigation potential of the state fertilization recommendation in Chinese cropland," Agricultural Systems, Elsevier, vol. 146(C), pages 1-10.
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