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Prospects of using drip irrigation for ecological conservation and reclaiming highly saline soils at the edge of Yinchuan Plain

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  • Dong, Shide
  • Wan, Shuqin
  • Kang, Yaohu
  • Li, Xiaobin

Abstract

Reclaiming saline soils at the edge of Yinchuan Plain is of paramount importance for ecological conservation. Therefore, efficiency of drip irrigation method was evaluated in a field experiment. The experiment using drip irrigation as reclamation method was carried out that included five soil matric potentials (SMPs) controlled at −5, −10, −15, −20 and −25 kPa (treatments S1–S5, respectively) directly under drip emitters at 20 cm depth. Measures including vegetation collocation, high-raised ridge and three-stage drip irrigation scheduling were adopted. Results showed that SMP thresholds significantly affected the spatial distributions of both electrical conductivity (ECe) and sodium adsorption ratio (SARe) based on extracts of saturated paste. The low salinity and SARe zones either kept enlarging or remained stable when SMP thresholds were above −20 kPa. However, for treatment S5(−25 kPa), these gradually shrank with time. By the end of the second year, the average ECe values in treatments S1–S5 were 2.05, 2.59, 3.36, 3.05 and 3.9 dS m−1, respectively, indicating that ECe increased linearly as SMP threshold decreased. The SARe showed the same trend, with corresponding values of 9.56, 10.48, 12.26, 12.82 and 15.23 (mmol L−1)0.5. The pH of the saturated soil extract (pHe) in all treatments increased from 7.64 to around 8.00 and was not significantly affected by treatments. Moreover, the two-year survival rates of the dominant trees were >87.5% when SMP threshold was above −20 kPa. The growth indexes of plants reduced with the decrease in SMP thresholds and statistical analysis suggested that −20 to −17 kPa was an important SMP range, below which the forage yield of the herbaceous legume Astragalus adsurgens dropped sharply. This study suggested the SMP threshold of −20 kPa was important for drip irrigation scheduling and the drip irrigation, combined with ridging plantation, was efficient for both vegetation reclamation and reclaiming saline soils in these saline areas with shallow ground water.

Suggested Citation

  • Dong, Shide & Wan, Shuqin & Kang, Yaohu & Li, Xiaobin, 2020. "Prospects of using drip irrigation for ecological conservation and reclaiming highly saline soils at the edge of Yinchuan Plain," Agricultural Water Management, Elsevier, vol. 239(C).
    • Handle: RePEc:eee:agiwat:v:239:y:2020:i:c:s0378377419320323
    DOI: 10.1016/j.agwat.2020.106255
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    References listed on IDEAS

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    1. Sun, Jiaxia & Kang, Yaohu & Wan, Shuqin & Hu, Wei & Jiang, Shufang & Zhang, Tibin, 2012. "Soil salinity management with drip irrigation and its effects on soil hydraulic properties in north China coastal saline soils," Agricultural Water Management, Elsevier, vol. 115(C), pages 10-19.
    2. Wang, Ruoshui & Wan, Shuqin & Kang, Yaohu & Dou, Chaoyin, 2014. "Assessment of secondary soil salinity prevention and economic benefit under different drip line placement and irrigation regime in northwest China," Agricultural Water Management, Elsevier, vol. 131(C), pages 41-49.
    3. Kang, Yaohu & Wang, Ruoshui & Wan, Shuqin & Hu, Wei & Jiang, Shufang & Liu, Shiping, 2012. "Effects of different water levels on cotton growth and water use through drip irrigation in an arid region with saline ground water of Northwest China," Agricultural Water Management, Elsevier, vol. 109(C), pages 117-126.
    4. Wan, Shuqin & Jiao, Yanping & Kang, Yaohu & Hu, Wei & Jiang, Shufang & Tan, Junli & Liu, Wei, 2012. "Drip irrigation of waxy corn (Zea mays L. var. ceratina Kulesh) for production in highly saline conditions," Agricultural Water Management, Elsevier, vol. 104(C), pages 210-220.
    5. Chen, Xiulong & Kang, Yaohu & Wan, Shuqin & Chu, Linlin & Li, Xiaobin, 2015. "Chinese rose (Rosa chinensis) cultivation in Bohai Bay, China, using an improved drip irrigation method to reclaim heavy coastal saline soils," Agricultural Water Management, Elsevier, vol. 158(C), pages 99-111.
    6. Wang, Ruoshui & Kang, Yaohu & Wan, Shuqin & Hu, Wei & Liu, Shiping & Jiang, Shufang & Liu, Shuhui, 2012. "Influence of different amounts of irrigation water on salt leaching and cotton growth under drip irrigation in an arid and saline area," Agricultural Water Management, Elsevier, vol. 110(C), pages 109-117.
    7. Li, Xiaobin & Wan, Shuqin & Kang, Yaohu & Chen, Xiulong & Chu, Linlin, 2016. "Chinese rose (Rosa chinensis) growth and ion accumulation under irrigation with waters of different salt contents," Agricultural Water Management, Elsevier, vol. 163(C), pages 180-189.
    8. Liu, Shuhui & Kang, Yaohu & Wan, Shuqin & Wang, Zhichun & Liang, Zhengwei & Sun, Xiaojing, 2011. "Water and salt regulation and its effects on Leymus chinensis growth under drip irrigation in saline-sodic soils of the Songnen Plain," Agricultural Water Management, Elsevier, vol. 98(9), pages 1469-1476, July.
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    2. Yongwei Liu & Zhenzhen Yang & Changxiong Zhu & Baogang Zhang & Hongna Li, 2023. "The Eco-Agricultural Industrial Chain: The Meaning, Content and Practices," IJERPH, MDPI, vol. 20(4), pages 1-12, February.
    3. Daniel Morales Martínez & Alexandre Gori Maia & Junior Ruiz Garcia, 2022. "Spatial diffusion of efficient irrigation systems: a study of São Paulo, Brazil," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 66(3), pages 690-712, July.
    4. Huang, Yajie & Ma, Yibing & Zhang, Shiwen & Li, Zhen & Huang, Yuanfang, 2021. "Optimum allocation of salt discharge areas in land consolidation for irrigation districts by SahysMod," Agricultural Water Management, Elsevier, vol. 256(C).
    5. Dong, Shide & Wang, Guangmei & Kang, Yaohu & Ma, Qian & Wan, Shuqin, 2022. "Soil water and salinity dynamics under the improved drip-irrigation scheduling for ecological restoration in the saline area of Yellow River basin," Agricultural Water Management, Elsevier, vol. 264(C).
    6. Dong, Shide & Wan, Shuqin & Kang, Yaohu & Li, Xiaobin, 2021. "Establishing an ecological forest system of salt-tolerant plants in heavily saline wasteland using the drip-irrigation reclamation method," Agricultural Water Management, Elsevier, vol. 245(C).
    7. Dong, Shide & Wan, Shuqin & Kang, Yaohu & Miao, Junxia & Li, Xiaobin, 2021. "Different mulching materials influence the reclamation of saline soil and growth of the Lycium barbarum L. under drip-irrigation in saline wasteland in northwest China," Agricultural Water Management, Elsevier, vol. 247(C).

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