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Chinese Journal of Applied Ecology ›› 2023, Vol. 34 ›› Issue (12): 3322-3332.doi: 10.13287/j.1001-9332.202312.012

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Effect of single basal application of controlled-release blended fertilizer on reactive nitrogen loss, carbon and nitrogen footprint during summer maize growth period

GAO Wei1,2,3, LI Zishuang4, XIE Jianzhi2, ZHOU Xiaolin4, DU Mengyang4, WANG Xuexia1,3, CHEN Yanhua1,3, CAO Bing1,3*   

  1. 1Institute of Plant Nutrition, Resource and Environment, Beijing Academy of Agricultural and Forestry Sciences, Beijing 100097, China;
    2College of Resources & Environmental Sciences, Hebei Agricultural University, Baoding 071000, Hebei, China;
    3Beijing Engineering Technology Research Center for Slow/Controlled-Release Fertilizer, Beijing 100097, China;
    4Dezhou Academy of Agricultural Sciences, Dezhou 253015, Shandong, China
  • Received:2023-08-23 Revised:2023-10-20 Online:2023-12-15 Published:2024-06-15

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Abstract: To elucidate the agronomic and environmental effects of single basal application of controlled-release blended fertilizer in summer maize, and optimize management measures of nitrogen fertilizer for grain production in North China Plain, we conducted a field experiment in Dezhou Modern Agricultural Science and Technology Park in Shandong Province. There were four treatments: CK (no N fertilizer), FFP (farmer’s fertilizing practice, 240 kg N·hm-2), OPT (optimized nitrogen application, 210 kg N·hm-2), and CRBF (controlled-release blended fertilizer with single basal application, 210 kg N·hm-2). We compared maize yield and reactive nitrogen loss, and quantitatively evaluated the carbon and nitrogen footprints by using life cycle assessment method. The results showed that nitrogen application significantly increased summer maize yield. Compared with FFP, OPT and CRBF increased summer corn yield by 0.7% and 2.9%, respectively, decreased the total amount of ammonia volatilization, N2O emission, and nitrate leaching by 13.0% and 72.7%, 13.3% and 37.5%, 20.5% and 23.5% respectively. Compared with CK, nitrogen application significantly increased the global warming potential (GWP) of summer maize production. Compared with FFP, GWP and greenhouse gas emission intensity of OPT decreased by 3.8% and 4.2%, while the reduction of CRBF were 8.7% and 12.0%, respectively. Compared with CK, nitrogen application significantly increased the carbon and nitrogen footprint of summer maize production. The production and transportation of nitrogen fertilizer and soil greenhouse gas emission were the main contributing factors of the carbon footprint, with contribution rates of 54%-60% and 24%-31%, respectively. Nitrate leaching was the main contributing factor of nitrogen footprint, with contribution rate of 57%-94%. Compared with FFP, the carbon and nitrogen footprints of OPT and CRBF were reduced by 11.0% and 16.5%, 19.6% and 28.4%, respectively. Considering the yield, reactive nitrogen loss and carbon and nitrogen footprint, we recommended the single basal application of controlled-release blended fertilizer as an effective nitrogen fertilizer management measure to promote grain clean production in the North China Plain.

Key words: controlled-release blended fertilizer, ammonia volatilization, nitrate leaching, greenhouse gas emissions, life cycle assessment, carbon and nitrogen footprint