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An adaptive abiotic stresses strategy to improve water use efficiency, quality, and economic benefits of Panax notoginseng: Deficit irrigation combined with sodium chloride

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Listed:
  • Zang, Zhennan
  • Liang, Jiaping
  • Yang, Qiliang
  • Zhou, Ningshan
  • Li, Na
  • Liu, Xiaogang
  • Liu, Yanwei
  • Tan, Shuai
  • Chen, Shaomin
  • Tang, Zhenya

Abstract

It is still a long-term challenge to decrease root rot and improve saponin content of Panax notoginseng, thus economic benefits in Guangxi and Yunnan provinces, China. The objective of this study was therefore to propose a promising abiotic stresses strategy: deficit irrigation combined with sodium chloride (DISC) to cope with the challenge. A two-year field experiment was conducted to explore the effects of deficit irrigation combined with sodium chloride on physiological traits, yield, quality attributes, water use efficiency, and economic benefit of Panax notoginseng in 2018 and 2019. Experiment treatments consisted of two deficit irrigation levels [DL, light deficit level: irrigation upper∼lower limit (80–65 %)θFC; DM, moderate deficit level: irrigation upper∼lower limit: (70–55 %)θFC, where θFC represents field capacity] and five NaCl application rates [0 (C0), 15 (C1), 30 (C2), 45 (C3), and 60 (C4) mmol L−1], respectively. All treatments were designed using a randomized complete block with three replications. The results indicated that DISC could significantly promote the physiology and growth of Panax notoginseng and improve yield, quality and economic benefits under micro-sprinkler irrigation and shaded conditions in 2018 and 2019. Compared with the DMC0 and DLC0 treatments, DLC1 treatment significantly improved net photosynthetic rate (Pn), stomatal conductance (Gs), root (kr), shoot (ksh), and canopy (kc) hydraulic conductance of Panax notoginseng. The DLC1 treatment significantly increased root length, surface area, average diameter, and volume of root of Panax notoginseng compared with the DMC0 and DLC0 treatments. The DLC1 treatment significantly improved rood dry matter, yield, saponin content of Panax notoginseng, water use efficiency, and economic benefits by decreasing the incidence of root rot, but reverse results were observed in the DLC2, DLC3, and DLC4 treatments. Therefore, this study suggested that deficit irrigation amount [DL, (80–65 %)θFC] combined with NaCl concentration (C1, 15 mmol L−1) should be recommended as an appropriate agronomic management strategy to alleviate root rot and improve water use efficiency, saponin content, economic benefits of Panax notoginseng in the seasonally arid region of Southwest China.

Suggested Citation

  • Zang, Zhennan & Liang, Jiaping & Yang, Qiliang & Zhou, Ningshan & Li, Na & Liu, Xiaogang & Liu, Yanwei & Tan, Shuai & Chen, Shaomin & Tang, Zhenya, 2022. "An adaptive abiotic stresses strategy to improve water use efficiency, quality, and economic benefits of Panax notoginseng: Deficit irrigation combined with sodium chloride," Agricultural Water Management, Elsevier, vol. 274(C).
    • Handle: RePEc:eee:agiwat:v:274:y:2022:i:c:s037837742200470x
    DOI: 10.1016/j.agwat.2022.107923
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    1. Zotarelli, Lincoln & Scholberg, Johannes M. & Dukes, Michael D. & Muñoz-Carpena, Rafael & Icerman, Jason, 2009. "Tomato yield, biomass accumulation, root distribution and irrigation water use efficiency on a sandy soil, as affected by nitrogen rate and irrigation scheduling," Agricultural Water Management, Elsevier, vol. 96(1), pages 23-34, January.
    2. Li, Jie & Yang, Qiliang & Shi, Zhengtao & Zang, Zhennan & Liu, Xiaogang, 2021. "Effects of deficit irrigation and organic fertilizer on yield, saponin and disease incidence in Panax notoginseng under shaded conditions," Agricultural Water Management, Elsevier, vol. 256(C).
    3. Liang, Jiaping & Shi, Wenjuan & He, Zijian & Pang, Linna & Zhang, Yanchao, 2019. "Effects of poly-γ-glutamic acid on water use efficiency, cotton yield, and fiber quality in the sandy soil of southern Xinjiang, China," Agricultural Water Management, Elsevier, vol. 218(C), pages 48-59.
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    1. Chen, Fei & Cui, Ningbo & Jiang, Shouzheng & Wang, Zhihui & Li, Hongping & Lv, Min & Wang, Yaosheng & Gong, Daozhi & Zhao, Lu, 2023. "Multi-objective deficit drip irrigation optimization of citrus yield, fruit quality and water use efficiency using NSGA-II in seasonal arid area of Southwest China," Agricultural Water Management, Elsevier, vol. 287(C).

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