Journal of Integrative Agriculture ›› 2022, Vol. 21 ›› Issue (2): 532-541.DOI: 10.1016/S2095-3119(21)63614-6

所属专题: 农业生态环境-氮素合辑Agro-ecosystem & Environment—Nitrogen

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我国小麦农家种和选育品种籽粒锌、铁含量差异及对叶面施肥的响应

  

  • 收稿日期:2020-08-05 接受日期:2020-12-28 出版日期:2022-01-02 发布日期:2022-01-02

Grain zinc and iron concentrations of Chinese wheat landraces and cultivars and their responses to foliar micronutrient applications

JIANG Li-na1, MA Jing-li2, WANG Xiao-jie2, LIU Gang-gang2, ZHU Zhao-long2, QI Chen-yang2, ZHANG Ling-fang2, LI Chun-xi1, WANG Zhi-min3, HAO Bao-zhen2     

  1. 1 College of Life Sciences, Henan Normal University, Xinxiang 453007, P.R.China
    2 School of Life Science and Basic Medicine, Xinxiang University, Xinxiang 453003, P.R.China
    3 College of Agronomy, China Agricultural University, Beijing 100193, P.R.China
  • Received:2020-08-05 Accepted:2020-12-28 Online:2022-01-02 Published:2022-01-02
  • About author:JIANG Li-na, Tel: +86-373-3326427, E-mail: jiangln@htu.cn; Correspondence HAO Bao-zhen, Tel: +86-373-3682679, E-mail: haobaozhenxx@126.com
  • Supported by:
    This study was supported by the National Key Research and Development Program of China (2018YFD0300705 and 2017YFD0301101), the National Key Technologies R&D Program of China during the 13th Five-Year Plan period (2013BAD07B14), the Key Science and Technology Program of Higher Education Institutions in Henan Province, China (20B210017) and the Scientific and Technological Project of Henan Province, China (202102110168).

摘要:

28份小麦农家种和63份选育品种为供试验材料开展田间试验,研究小麦农家种和选育品种籽粒锌、铁含量差异及对叶面施肥的响应。研究表明,供试小麦品种的平均锌含量为41.8 mg kg-129.0-63.3 mg kg-1),平均铁含量为39.7 mg kg-1 27.9-67.0 mg kg-1)。小麦农家种的锌和铁含量分别比选育品种高11.0%4.8%,但小麦农家种的收获指数、单穗粒重、单穗粒数和千粒重均低于选育品种。相关分析表明,籽粒锌、铁含量均与收获指数、单穗粒重和单穗粒数呈显著负相关,而与千粒重相关性较低,据此可推测,农家种籽粒锌、铁含量高于选育品种可能与农家种的收获指数、单穗粒重和单穗粒数较低有关,而与千粒重无关。叶面喷施锌肥,农家种和选育品种的籽粒锌含量均显著增加,农家种的籽粒锌含量增加了12.6 mkg-1,约是选育品种的两倍(6.4 mg kg-1)。叶面喷施铁肥农家种和选育品种的籽粒铁含量分别增加了3.4 1.2 mkg-1,均没有达到显著水平。可以看出,与小麦选育品种相比,农家种不仅籽粒锌、铁含量较高,且在叶面施锌条件下籽粒锌含量增幅较大,表明我国小麦农家种可作为潜在种质资源用于提高现代选育品种的微量元素含量。

Abstract: Grain zinc (Zn) and iron (Fe) concentrations and their responses to foliar application of micronutrients in 28 Chinese wheat landraces and 63 cultivars were investigated in a two-year field experiment.  The average grain Zn and Fe concentrations were 41.8 mg kg–1 (29.0−63.3 mg kg–1) and 39.7 mg kg–1 (27.9−67.0 mg kg–1), respectively.  Compared with cultivars, landraces had greater grain Zn (11.0%) and Fe (4.8%) concentrations but lower harvest index (HI), grain weight per spike (GWS), grain number per spike (GNS) and thousand grain weight (TGW).  Both Zn and Fe concentrations were negatively and significantly correlated with HI, GWS, and GNS, while showed a poor association with TGW, suggesting that lower HI, GWS, and GNS, but not TGW, accounted for higher Zn and Fe concentrations for landraces than for cultivars.  Grain Zn concentrations of both cultivars and landraces significantly increased after foliar Zn spray and the increase was two-fold greater for landraces (12.6 mg kg–1) than for cultivars (6.4 mg kg–1).  Foliar Fe spray increased grain Fe concentrations of landraces (3.4 mg kg–1) and cultivars (1.2 mg kg–1), but these increases were not statistically significant.  This study showed that Chinese wheat landraces had higher grain Zn and Fe concentrations than cultivars, and greater increases occurred in grain Zn concentration than in grain Fe concentration in response to fertilization, suggesting that Chinese wheat landraces could serve as a potential genetic source for enhancing grain mineral levels in modern wheat cultivars.


Key words: wheat , cultivar , landrace , foliar application of micronutrients