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The effects of ploy (γ-glutamic acid) on spinach productivity and nitrogen use efficiency in North-West China

Author

Listed:
  • Lin CHEN

    (State Key Laboratory of Ecological Water Resource in Northwest Arid Region Co-sponsored by Province and Ministry, Xi'an University of Technology, Xi'an, P.R. China)

  • Liangjun FEI

    (State Key Laboratory of Ecological Water Resource in Northwest Arid Region Co-sponsored by Province and Ministry, Xi'an University of Technology, Xi'an, P.R. China)

  • Zilu WANG

    (Yellow River Institute of Hydraulic Research, Zhengzhou, P.R. China)

  • Mohamed Khaled SALAHOU

    (State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Hohai University, Nanjing, P.R. China)

  • Le LIU

    (State Key Laboratory of Ecological Water Resource in Northwest Arid Region Co-sponsored by Province and Ministry, Xi'an University of Technology, Xi'an, P.R. China)

  • Yun ZHONG

    (State Key Laboratory of Ecological Water Resource in Northwest Arid Region Co-sponsored by Province and Ministry, Xi'an University of Technology, Xi'an, P.R. China)

  • Zhiguang DAI

    (State Key Laboratory of Ecological Water Resource in Northwest Arid Region Co-sponsored by Province and Ministry, Xi'an University of Technology, Xi'an, P.R. China
    School of Hydraulic and Ecological Engineering, Nanchang Institute of Technology,)

Abstract

Recently, with the problem of low utilization rate of nitrogen fertilizers in farmland, agriculture practices have shifted towards the development of environmentally friendly nitrogen fertilizers. Ploy (γ-glutamic acid) is a new plant growth regulator with characteristics of water and fertilizer conservation. In this study, pot experiments were conducted to investigate the effects of ploy (γ-PGA) on the yield, nitrogen use efficiency and soil aggregate of spinach (Spinacia oleracea L.). The results indicated that γ-PGA (0.1%) increased plant growth (as measured by fresh and dry plant weight). However, increasing γ-PGA significantly decreased spinach quality parameters. The nitrogen utilization and use efficiency were increased with increasing γ-PGA. Ploy was stronger in water coagulation which effectively increased soil porosity and improved soil structure. The results suggest that 0.1% of γ-PGA has positive effects on spinach growth.

Suggested Citation

  • Lin CHEN & Liangjun FEI & Zilu WANG & Mohamed Khaled SALAHOU & Le LIU & Yun ZHONG & Zhiguang DAI, 2018. "The effects of ploy (γ-glutamic acid) on spinach productivity and nitrogen use efficiency in North-West China," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 64(11), pages 517-522.
    • Handle: RePEc:caa:jnlpse:v:64:y:2018:i:11:id:371-2018-pse
    DOI: 10.17221/371/2018-PSE
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