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Partial root zone irrigation and K application improves summer maize production and salt resistance in saline soil

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  • Zhang, Yecheng
  • Li, Xinzhu
  • Jia, Liang
  • Ji, Lei
  • Wang, Chengqiang
  • Xu, Wenhua
  • Wang, Shuhong
  • Zhou, Yonggang
  • Han, Huifang
  • Han, Kun
  • Liu, Peng

Abstract

Irrigation patterns and K fertilization are the key measures used to improve the salt tolerance of crops in saline land. A pot experiment was carried out to assess the effects of partial root-zone irrigation and K fertilization on maize in saline land. For the study parameters, we used a split plot design with three irrigation treatments (conventional irrigation (CI), fixed root-zone irrigation (FRI) and alternate root-zone irrigation (ARI)) and two K application rates (0 (K0) and 120 (K1) kg K2O ha−1). Compared with the CI treatment, the FRI and ARI treatments reduced the transpiration rate (Tr) and MDA content but increased the root length density (RLD), root surface density (RSD), root volume density (RVD), root dry weight density (RDWD), proline content, plant K/Na ratio, photosynthetic rate (Pn), yield, water use efficiency (WUE) and K use efficiency (KUE). Compared with the FRI treatment, the ARI treatment increased RLD, RSD, RVD, RDWD, the Tr, the proline content, the plant K/Na ratio and the Pn but decreased the MDA content; these factors increased yield, WUE and KUE. K application decreased the MDA content; improved root growth; and increased the stomatal conductance, Tr, proline content, Pn, yield and WUE. Of all the treatments, the ARI-K1 treatment maximized RLD, RSD, RVD, RDWD, the Pn and yield while minimizing the MDA content. Therefore, ARI combined with K application can maximize resistance to salt stress and osmotic stress, delay senescence, and improve photosynthesis, yield and WUE.

Suggested Citation

  • Zhang, Yecheng & Li, Xinzhu & Jia, Liang & Ji, Lei & Wang, Chengqiang & Xu, Wenhua & Wang, Shuhong & Zhou, Yonggang & Han, Huifang & Han, Kun & Liu, Peng, 2024. "Partial root zone irrigation and K application improves summer maize production and salt resistance in saline soil," Agricultural Water Management, Elsevier, vol. 303(C).
    • Handle: RePEc:eee:agiwat:v:303:y:2024:i:c:s0378377424003925
    DOI: 10.1016/j.agwat.2024.109057
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    References listed on IDEAS

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    1. Khaleghi, Moazam & Hassanpour, Farzad & Karandish, Fatemeh & Shahnazari, Ali, 2020. "Integrating partial root-zone drying and saline water irrigation to sustain sunflower production in freshwater-scarce regions," Agricultural Water Management, Elsevier, vol. 234(C).
    2. Amer, Kamal H., 2010. "Corn crop response under managing different irrigation and salinity levels," Agricultural Water Management, Elsevier, vol. 97(10), pages 1553-1563, October.
    3. Hu, Tiantian & Yuan, Lina & Wang, Jinfeng & Kang, Shaozhong & Li, Fusheng, 2010. "Antioxidation responses of maize roots and leaves to partial root-zone irrigation," Agricultural Water Management, Elsevier, vol. 98(1), pages 164-171, December.
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