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The impact of source or sink limitations on yield formation of winter wheat (Triticum aestivum L.) due to post-anthesis water and nitrogen deficiencies

Author

Listed:
  • A. Madani

    (Department of Agronomy and Plant Breeding, Gonabad Branch, Islamic Azad University, Gonabad, Iran)

  • A. Shirani-Rad

    (Department of Oilseed Crops, Seed and Plant Improvement Institute, Karaj, Iran)

  • A. Pazoki

    (Department of Agriculture, Shahr-e-Rey Branch, Islamic Azad University, Tehran, Iran)

  • G. Nourmohammadi

    (Department of Agronomy and Plant Breeding, Gonabad Branch, Islamic Azad University, Gonabad, Iran)

  • R. Zarghami

    (Agricultural Biotechnology Research Institute, Karaj, Iran)

  • A. Mokhtassi-Bidgoli

    (Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran)

Abstract

The experiments were laid out to understand the mechanisms causing yield limitations imposed by post-anthesis water and nitrogen deficiencies in plants with modified source-sink ratios. Two soil-water regimes were allotted to the main plots. At anthesis, three levels of N were applied: none, 25% and 50% of total the N supply. Spike-halving caused reduction in grain yield at both water regimes and all N supply levels, showing that the reduction in grain number can not be compensated by a higher individual grain weight. Sink reduction by trimming 50% of the spikelets reduced grain number per ear by 38.5% and increased individual grain weight by 12.0%, which shows the plasticity in grain weight and grain set of wheat if sufficient assimilates are available. Additional nitrogen supply at anthesis had no significant effect on the total aboveground biomass, but increased grain yield through more allocation of dry matter to grains. Our findings suggest that for rainfed wheat with optimum N supply and supplemental irrigation, wheat growers should choose cultivars with a high grain number per ear and manage the crop to increase grain number per unit of land (sink capacity).

Suggested Citation

  • A. Madani & A. Shirani-Rad & A. Pazoki & G. Nourmohammadi & R. Zarghami & A. Mokhtassi-Bidgoli, 2010. "The impact of source or sink limitations on yield formation of winter wheat (Triticum aestivum L.) due to post-anthesis water and nitrogen deficiencies," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 56(5), pages 218-227.
    • Handle: RePEc:caa:jnlpse:v:56:y:2010:i:5:id:193-2009-pse
    DOI: 10.17221/193/2009-PSE
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    References listed on IDEAS

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    1. Karam, Fadi & Kabalan, Rabih & Breidi, Jolle & Rouphael, Youssef & Oweis, Theib, 2009. "Yield and water-production functions of two durum wheat cultivars grown under different irrigation and nitrogen regimes," Agricultural Water Management, Elsevier, vol. 96(4), pages 603-615, April.
    2. J. Haberle & P. Svoboda & I. Raimanová, 2008. "The effect of post-anthesis water supply on grain nitrogen concentration and grain nitrogen Šeld of winter wheat," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 54(7), pages 304-312.
    3. Singh, Anil Kumar & Tripathy, Rojalin & Chopra, Usha Kiran, 2008. "Evaluation of CERES-Wheat and CropSyst models for water-nitrogen interactions in wheat crop," Agricultural Water Management, Elsevier, vol. 95(7), pages 776-786, July.
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    Cited by:

    1. Yang, Lei & Fang, Xiangyang & Zhou, Jie & Zhao, Jie & Hou, Xiqing & Yang, Yadong & Zang, Huadong & Zeng, Zhaohai, 2024. "Optimal irrigation for wheat-maize rotation depending on precipitation in the North China Plain: Evidence from a four-year experiment," Agricultural Water Management, Elsevier, vol. 294(C).
    2. A. Madani & A.H. Makarem & F. Vazin & M. Joudi, 2012. "The impact of post-anthesis nitrogen and water availability on yield formation of winter wheat," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 58(1), pages 9-14.
    3. B. Roitner-Schobesberger & H.-P. Kaul, 2013. "Source capacity during flowering affects grain yield of amaranth (Amaranthus sp.)," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 59(10), pages 472-477.
    4. Machekposhti, Mabood Farhadi & Shahnazari, Ali & Yousefian, Mostafa & Ahmadi, Mirkhalegh Z. & Sarjaz, Mahmoud Raeini & Arabzadeh, Behrouz & Akbarzadeh, Ali & Leib, Brian G., 2023. "The effect of alternate partial root-zone drying and deficit irrigation on the yield, quality, and physiochemical parameters of milled rice," Agricultural Water Management, Elsevier, vol. 289(C).
    5. M. Oveysi & M.J. Mirhadi & H. Madani & G. Nourmohammadi & R. Zarghami & A. Madani, 2010. "The impact of source restriction on yield formation of corn (Zea mays L.) due to water deficiency," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 56(10), pages 476-481.

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