Subtropical Plant Science >

2025 , Vol. 54 >Issue 6: 629 - 635

DOI: https://doi.org/10.3969/j.issn.1009-7791.2025.06.004

Research articles

Effects of Deficit Irrigation on the Quality and Yield of Astragalus membranaceus var. mongholicus in the Hexi Oasis Irrigation Area

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  • (1. College of Water Resources and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, Gansu China; 2. Minle Hongshui River Management Office, , Minle 734500, Gansu China)

Received date: 2025-05-08

  Accepted date: 2025-07-15

  Online published: 2025-12-31

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Abstract

A field experiment was conducted in the Hexi Oasis Irrigation Area, where water deficit treatments were imposed at four growth stages of Astragalus membranaceus var. mongholicus: bud-breaking and flowering stage, rhizome elongation stage, fruit maturation stage, and rhizome thickening stage. The treatments included mild water deficit (65%–75% field capacity, FC) and moderate water deficit (55%–65% FC), with full irrigation (75%–85% FC) throughout the entire growth period serving as the control (CK), to investigate the response mechanisms of quality and yield of A. membranaceus var. mongholicus to water stress at different growth stages. The results showed that, compared with CK, mild deficit irrigation (65%–75% FC) during the fruit maturation and rhizome thickening stages significantly increased the contents of active components including calycosin-7-glucoside, ononin, and astragaloside IV; moderate regulated deficit irrigation (55%–65% FC) during the rhizome elongation stage enhanced the content of calycosin; and mild deficit irrigation (65%–75% FC) during the bud-breaking and flowering stage and rhizome elongation stage improved the yield of A. membranaceus var. mongholicus. Comprehensive evaluation indicated that mild regulated deficit irrigation (65%–75% FC) during the rhizome elongation stage should be adopted as the optimal irrigation strategy, while mild regulated deficit irrigation (65%–75% FC) during the fruit maturation stage could serve as an alternative strategy for A. membranaceus var. mongholicus cultivation in the Hexi Oasis Irrigation Area.

Key words： Astragalus membranaceus var. mongholicus; deficit irrigation; quality; yield

Cite this article

ZHANG Li-xing, LI Fu-qiang, TENG An-guo, LEI Lian, Guo Hui, CHEN Xie-tian, LI Zhe . Effects of Deficit Irrigation on the Quality and Yield of Astragalus membranaceus var. mongholicus in the Hexi Oasis Irrigation Area[J]. Subtropical Plant Science, 2025 , 54(6) : 629 -635 . DOI: 10.3969/j.issn.1009-7791.2025.06.004

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