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

Lin CHEN; Liangjun FEI; Zilu WANG; Mohamed Khaled SALAHOU; Le LIU; Yun ZHONG; Zhiguang DAI

doi:10.17221/371/2018-PSE

Plant, Soil and Environment (Nov 2018)

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

Lin CHEN,
Liangjun FEI,
Zilu WANG,
Mohamed Khaled SALAHOU,
Le LIU,
Yun ZHONG,
Zhiguang DAI

Affiliations

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

DOI: https://doi.org/10.17221/371/2018-PSE
Journal volume & issue: Vol. 64, no. 11
pp. 517 – 522

Abstract

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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.

Published in Plant, Soil and Environment

ISSN: 1214-1178 (Print); 1805-9368 (Online)
Publisher: Czech Academy of Agricultural Sciences
Country of publisher: Czechia
LCC subjects: Agriculture: Plant culture
Website: https://pse.agriculturejournals.cz/

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