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Cultivation and Nitrogen Management Practices Effect on Soil Carbon Fractions, Greenhouse Gas Emissions, and Maize Production under Dry-Land Farming System

Author

Listed:
  • Honglei Ren

    (Heilongjiang Academy of Agriculture Sciences, Harbin 150086, China)

  • Shengjun Xu

    (Gansu Academy of Agricultural Sciences, Lanzhou 730070, China)

  • Fengyi Zhang

    (Heilongjiang Academy of Agriculture Sciences, Harbin 150086, China)

  • Mingming Sun

    (Heilongjiang Academy of Agriculture Sciences, Harbin 150086, China)

  • Ruiping Zhang

    (Heilongjiang Academy of Agriculture Sciences, Harbin 150086, China)

Abstract

Effective nitrogen management practices by using two cultivation techniques can improve corn productivity and soil carbon components such as soil carbon storage, microbial biomass carbon (MBC), carbon management index (CMI), and water-soluble carbon (WSC). It is essential to ensure the long-term protection of dry-land agricultural systems. However, excessive application of nitrogen fertilizer reduces the efficiency of nitrogen use and also leads to increased greenhouse gas emissions from farming soil and several other ecological problems. Therefore, we conducted field trials under two planting methods during 2019–2020: P: plastic mulching ridges; F: traditional flat planting with nitrogen management practices, i.e., 0: no nitrogen fertilizer; FN: a common nitrogen fertilizer rate for farmers of 290 kg ha −1 ; ON: optimal nitrogen application rate of 230 kg ha −1 ; ON75%+DCD : 25% reduction in optimal nitrogen fertilizer rate + dicyandiamide; ON75%+NC : 25% reduction in optimal nitrogen rate + nano-carbon. The results showed that compared to other treatments, the PON75%+DCD treatment significantly increased soil water storage, water use efficiency (WUE), and nitrogen use efficiency (NUE) because total evapotranspiration (ET) and GHG were reduced. Under the P ON75%+DCD or P ON75%+NC , the soil carbon storage significantly (50% or 47%) increased. The P ON75%+DCD treatment is more effective in improving MBC, CMI, and WSC, although it increases gaseous carbon emissions more than all other treatments. Compared with FFN, under the P ON75%+DCD treatment, the overall CH 4 , N 2 O, and CO 2 emissions are all reduced. Under the P ON75%+DCD treatment, the area scale GWP (52.7%), yield scale GWP (90.3%), biomass yield (22.7%), WUE (42.6%), NUE (80.0%), and grain yield (32.1%) significantly increased compared with F FN , which might offset the negative ecological impacts connected with climate change. The P ON75%+DCD treatment can have obvious benefits in terms of increasing yield and reducing emissions. It can be recommended to ensure future food security and optimal planting and nitrogen management practices in response to climate change.

Suggested Citation

  • Honglei Ren & Shengjun Xu & Fengyi Zhang & Mingming Sun & Ruiping Zhang, 2023. "Cultivation and Nitrogen Management Practices Effect on Soil Carbon Fractions, Greenhouse Gas Emissions, and Maize Production under Dry-Land Farming System," Land, MDPI, vol. 12(7), pages 1-16, June.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:7:p:1306-:d:1181785
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    References listed on IDEAS

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    1. Adhikari, Raju & Bristow, Keith L. & Casey, Philip S. & Freischmidt, George & Hornbuckle, John W. & Adhikari, Benu, 2016. "Preformed and sprayable polymeric mulch film to improve agricultural water use efficiency," Agricultural Water Management, Elsevier, vol. 169(C), pages 1-13.
    2. Ren, Xiaolong & Jia, Zhikuan & Chen, Xiaoli, 2008. "Rainfall concentration for increasing corn production under semiarid climate," Agricultural Water Management, Elsevier, vol. 95(12), pages 1293-1302, December.
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