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Impact of nitrogen fertilization on soil respiration and net ecosystem production in maize

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  • Shirley LAMPTEY

    (Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, P.R. China
    Collegeof Agronomy, Gansu Agricultural University, Lanzhou, P.R. China
    University for Development Studies, Tamale, Ghana)

  • LI Lingling

    (Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, P.R. China
    Collegeof Agronomy, Gansu Agricultural University, Lanzhou, P.R. China)

  • Junhong XIE

    (Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, P.R. China
    Collegeof Agronomy, Gansu Agricultural University, Lanzhou, P.R. China)

Abstract

Agriculture in the semi-arid is often challenged by overuse of nitrogen (N), inadequate soil water and heavy carbon emissions thereby threatening sustainability. Field experiments were conducted to investigate the effect of nitrogen fertilization levels (N0 - 0, N100 - 100, N200 - 200, N300 - 300 kg N/ha) on soil water dynamics, soil respiration (Rs), net ecosystem production (NEP), and biomass yields. Zero nitrogen soils decreased Rs by 23% and 16% compared to N300 and N200 soils, respectively. However, biomass yield was greatest under N300 compared with N0, which therefore translated into increased net primary production by 89% and NEP by 101% compared to N0. To a lesser extent, N200 increased net primary production by 69% and net ecosystem production by 79% compared to N0. Grain yields were greatest under N300 compared with N100 and N0, which therefore translated into increased carbon emission efficiency (CEE) by 53, 39 and 3% under N300 compared to N0, N100 and N200 treatments, respectively. There appears potential for 200 kg N/ha to be used to improve yield and increase CEE.

Suggested Citation

  • Shirley LAMPTEY & LI Lingling & Junhong XIE, 2018. "Impact of nitrogen fertilization on soil respiration and net ecosystem production in maize," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(8), pages 353-360.
    • Handle: RePEc:caa:jnlpse:v:64:y:2018:i:8:id:217-2018-pse
    DOI: 10.17221/217/2018-PSE
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    References listed on IDEAS

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    1. Yantai Gan & Chang Liang & Qiang Chai & Reynald L. Lemke & Con A. Campbell & Robert P. Zentner, 2014. "Improving farming practices reduces the carbon footprint of spring wheat production," Nature Communications, Nature, vol. 5(1), pages 1-13, December.
    2. Guanghua Yin & Jian Gu & Fasheng Zhang & Liang Hao & Peifei Cong & Zuoxin Liu, 2014. "Maize Yield Response to Water Supply and Fertilizer Input in a Semi-Arid Environment of Northeast China," PLOS ONE, Public Library of Science, vol. 9(1), pages 1-6, January.
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    4. Shirley LAMPTEY & LI Lingling & Junhong XIE & Renzhi ZHANG & Zhuzhu LUO & Liqun CAI & Jie LIU, 2017. "Soil respiration and net ecosystem production under different tillage practices in semi-arid Northwest China," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 63(1), pages 14-21.
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    Cited by:

    1. Jan Vopravil & Pavel Formánek & Jaroslava Janků & Ondřej Holubík & Tomáš Khel, 2021. "Early changes in soil organic carbon following afforestation of former agricultural land," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 16(4), pages 228-236.
    2. Chunming Jiang & Wantai Yu, 2019. "Maize production and field CO2 emission under different straw return rates in Northeast China," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 65(4), pages 198-204.

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