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Effects of a Preparation Containing Amino Acids on Pakchoi Nutrient Absorption, Yield, and Quality When Grown in Saline-Alkali Soil

Meng Xu, Liang Yuan, Shuiqin Zhang, Yanting Li () and Bingqiang Zhao
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Meng Xu: State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China (The Institute of Agricultural Resources and Regional Planning), Chinese Academy of Agricultural Sciences, Beijing 100081, China
Liang Yuan: State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China (The Institute of Agricultural Resources and Regional Planning), Chinese Academy of Agricultural Sciences, Beijing 100081, China
Shuiqin Zhang: State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China (The Institute of Agricultural Resources and Regional Planning), Chinese Academy of Agricultural Sciences, Beijing 100081, China
Yanting Li: State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China (The Institute of Agricultural Resources and Regional Planning), Chinese Academy of Agricultural Sciences, Beijing 100081, China
Bingqiang Zhao: State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China (The Institute of Agricultural Resources and Regional Planning), Chinese Academy of Agricultural Sciences, Beijing 100081, China

Agriculture, 2023, vol. 13, issue 4, 1-12

Abstract: Saline-alkali stress adversely affects crop growth and nutrient absorption, thereby reducing crop yield and quality. Exogenous amino acids have multiple synergistic effects; however, whether a preparation containing amino acids increases the resistance of pakchoi to saline-alkali soil remains unclear. This study investigated the effects of a patented “preparation” containing amino acids on crop growth, nutrient absorption, and tolerance to saline-alkali stress in pakchoi ( Brassica chinensis L.), using a pot culture experiment with three successive plantings. The preparation was made using tail liquor generated during the production of monosodium glutamate. Topdressing with the preparation had little effect on pakchoi growth, yield, quality, or nutrient accumulation, compared with no topdressing treatment. However, the addition of the preparation to water-soluble fertiliser increased crop yield by 11.9–17.6%, with a 15.4% cumulative increase over the three crops. The concentrations of vitamin C, soluble sugar, and soluble protein increased by 10.2–12.4%, 11.9–22.3%, and 3.0–14.3%, respectively. The fertiliser utilisation ratio for the three crops increased by 30.5%, while the nitrate content decreased by 8.5–20.4%. The fresh weight significantly decreased when the dosage of water-soluble fertiliser was reduced to 20%. However, the addition of the preparation to the reduced-dosage water-soluble fertiliser compensated for this reduction, especially in the third crop. Our results show that the preparation improves pakchoi resistance to saline-alkali stress and restores agricultural productivity.

Keywords: exogenous amino acid; saline-alkali stress; water-soluble fertiliser; pakchoi; nutrient absorption (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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