IDEAS home Printed from https://ideas.repec.org/a/eee/agiwat/v299y2024ics037837742400235x.html
   My bibliography  Save this article

The impact of drip irrigation and phosphorus fertilizer on enhancing dimorphic seed production of Lespedeza potaninii in Northwest China

Author

Listed:
  • Chen, Lijun
  • Liu, Jingze
  • Guo, Fukang
  • Jing, Song
  • Chu, Boyu
  • Qu, Yuncan
  • Li, Wen
  • Zhang, Jiyu

Abstract

Water shortage and poor soil fertility are two main limiting factors for crop production in semiarid region. We evaluated the effect of five irrigation times (0, 2, 3, 4 and 5 times with 50 mm per time) and four phosphorus fertilizer rates (0, 60, 90 and 120 kg/ha) on chasmogamous (CH) and cleistogamous (CL) part of Lespedeza potaninii on seed yield, total seed yield, seed yield components and agronomic traits from the year 2022 to 2023. The CH and CL seed yield, total seed yield of L. potaninii was significantly (p<0.001) affected by the year, irrigation, phosphorus fertilizer, and irrigation×phosphorus. The maximum average total seed yield over 2 years (1,126 kg/ha) occurred at the 5 times irrigation (250 mm) and 90 kg/ha phosphorus fertilizer rate (P). The CL seed yield exceeded the CH seed yield under the no irrigation and I2. Conversely, the CH seed yield was higher than the CL seed yield under the I3, I4, and I5 treatments. All the seed yield components were significantly (p<0.01) correlated with CH and CL seed yield. Correlation and structural equation model analyses were used to determine the contribution of yield components to seed yield. Increasing irrigation times and fertilization indirectly boosted CH and CL seed yield by raising the number of CH and CL racemes per stem, respectively. We found that the maximum water use efficiency was achieved with 4 times irrigation (200 mm) and 90 kg/ha P. At each irrigation level, the partial phosphorus fertilizer productivity at 60 kg/ha P was significantly (p<0.05) higher than that at other phosphorus application levels. Economic analysis showed that a considerable net profit was achieved after 5 times irrigation (250 mm) and 90 kg/ha P. Our findings enable further understanding of the mechanism of dimorphic seed yield response to irrigation and P in L. potaninii and provide a reference for appropriate agronomic measures to improve its dimorphic seed yield.

Suggested Citation

  • Chen, Lijun & Liu, Jingze & Guo, Fukang & Jing, Song & Chu, Boyu & Qu, Yuncan & Li, Wen & Zhang, Jiyu, 2024. "The impact of drip irrigation and phosphorus fertilizer on enhancing dimorphic seed production of Lespedeza potaninii in Northwest China," Agricultural Water Management, Elsevier, vol. 299(C).
    • Handle: RePEc:eee:agiwat:v:299:y:2024:i:c:s037837742400235x
    DOI: 10.1016/j.agwat.2024.108900
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S037837742400235X
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.agwat.2024.108900?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:agiwat:v:299:y:2024:i:c:s037837742400235x. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/locate/agwat .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.