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Soil respiration and net ecosystem production under different tillage practices in semi-arid Northwest China

Author

Listed:
  • Shirley LAMPTEY

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

  • Lingling LI

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

  • Junhong XIE

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

  • Renzhi ZHANG

    (Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, P.R. China
    College of Resources and Environmental Sciences, Gansu Agricultural University)

  • Zhuzhu LUO

    (Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, P.R. China
    College of Resources and Environmental Sciences, Gansu Agricultural University)

  • Liqun CAI

    (Gansu Provincial Key Lab of Arid Land Crop Science, Lanzhou, P.R. China
    College of Resources and Environmental Sciences, Gansu Agricultural University)

  • Jie LIU

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

Abstract

In semi-arid areas, increasing CO2 emissions are threatening agricultural sustainability. It is unclear whether different tillage practices without residue returned could help alleviate these issues while increasing crop productivity. This study aimed to quantify soil respiration under conventional tillage (CT); rotary tillage (RT); subsoiling (SS) and no-till (NT), all without residue returned in the Western Loess Plateau. The results showed that SS and NT significantly decreased soil respiration compared to CT, but the effects of SS was the greatest. As a result, SS decreased carbon emission by 22% in 2014 and 19% in 2015 versus CT. The trends of net ecosystem production under different tillage systems were as follows: CT > RT > NT > SS. No-till increased net ecosystem production by 33% in 2014 and 12% in 2015 relative to CT. The SS treatment increased average grain yield by 27% and 23% over CT and RT, and enhanced water use efficiency by an average of 43%. On average, SS increased carbon emission efficiency by 60% and 43% compared to CT and RT, respectively. Thus, subsoiling management strategy is a promising option for the development of sustainable agriculture in semi-arid areas.

Suggested Citation

  • Shirley LAMPTEY & Lingling LI & 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.
    • Handle: RePEc:caa:jnlpse:v:63:y:2017:i:1:id:403-2016-pse
    DOI: 10.17221/403/2016-PSE
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    Cited by:

    1. Shirley LAMPTEY & Lingling LI & 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.
    2. Jolanta BOJARSZCZUK & Jerzy KSIĘŻAK & Anna GAŁĄZKA, 2017. "Soil respiration depending on different agricultural practices before maize sowing," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 63(10), pages 435-441.

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