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Special Issue:
农业生态环境-肥料及施用合辑Agro-ecosystem & Environment—Fertilizer
农业生态环境-氮素合辑Agro-ecosystem & Environment—Nitrogen
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| Distribution and accumulation of zinc and nitrogen in wheat grain pearling fractions in response to foliar zinc and soil nitrogen applications |
ZHANG Pan-pan1, 2*, CHEN Yu-lu1, 3*, WANG Chen-yang1, 3, MA Geng1, 3, LÜ Jun-jie4, LIU Jing-bao2, GUO Tian-cai1, 3 |
1 State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou 450002, P.R.China
2 Cereal Institute, Henan Academy of Agricultural Sciences, Zhengzhou 450002, P.R.China
3 College of Agronomy, Henan Agricultural University, Zhengzhou 450002, P.R.China
4 Luoyang Academy of Agriculture and Forestry Sciences, Luoyang 471023, P.R.China |
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摘要
提高小麦籽粒锌含量对缓解人类膳食中锌缺乏有重要作用。本研究在华北平原连续两年小麦生长季，评价了叶面喷施锌肥和土壤施用氮肥对小麦籽粒粉样中氮、锌累积、分配、氮素转运及其相互关系。结果表明，小麦籽粒中氮、锌主要累积在籽粒胚乳中心层，其含量由外到内呈逐渐减小趋势。土壤施氮显著提高了籽粒各粉样中氮含量，而叶面喷锌显著增加了种皮中氮含量；两种措施均能显著增加胚乳中心层中锌含量。叶面喷锌对籽粒中氮、锌分配的影响不显著，而施氮则能促进氮素向糊粉层、锌素向胚乳中心层的转运，提高植株地上部氮素向籽粒转运的数量，但对贡献率无影响。相关分析表明，籽粒及其粉样中氮含量与开花期和成熟期营养器官中氮含量显著正相关，而种皮和胚乳过渡层中氮含量与胚乳中心层中锌含量亦呈显著的正相关。因此，叶面喷锌和土壤施氮可有效地提高小麦产量和籽粒氮、锌含量，尤其是提高胚乳中的氮、锌含量，可作为解决锌缺乏的有效途径。
Abstract Increasing zinc (Zn) concentration in wheat grain is important to minimize human dietary Zn deficiency. This study aimed to investigate the effect of foliar Zn and soil nitrogen (N) applications on the accumulation and distribution of N and Zn in grain pearling fractions, N remobilization, and the relationships between nutrient concentration in the vegetative tissues and grain or its fractions in two cropping years in the North China Plain. The results showed a progressive decrease in N and Zn concentrations from the outer to the inner parts of grain, with most of the accumulation in the core endosperm. Foliar Zn application significantly increased N concentration in the pericarp, and soil N application increased N concentration in each grain fraction. Both treatments significantly increased core endosperm Zn concentration. Foliar Zn had no effect on grain N and Zn distribution. Soil N application made N concentrated in the aleurone, promoted Zn translocation to the core endosperm and also increased N remobilization and its efficiency from the shoot to the grain, but no improved contribution to grain was found. N concentration in grain and its fractions were positively correlated with N in vegetative organs at anthesis and maturity, while positive correlations were obtained between N concentration in the pericarp and progressive central area of the endosperm and Zn concentration in the core endosperm. Thus, foliar Zn and soil N applications effectively increased yield and N and Zn concentrations in the wheat grain, particularly in the endosperm, and could be promising strategies to address Zn deficiency.
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Received: 10 July 2020
Accepted:
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| Fund: This study was supported by the National Key Research and Development Program of China (2018YFD0300707 and 2016YFD0300400) and the Modern Wheat Industrial Technology System of Henan Province, China (S2010-01-G07). |
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Corresponding Authors:
Correspondence WANG Chen-yang, Tel: +86-371-63558185, E-mail: xmzxwang@163.com
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| About author: ZHANG Pan-pan, Tel: +86-371-65739084, E-mail: zhangpan1602@163.com; CHEN Yu-lu, Tel: +86-371-65739084, E-mail: yuluchenlz@163.com; * These authors contributed equally to this study. |
Cite this article:
ZHANG Pan-pan, CHEN Yu-lu, WANG Chen-yang, MA Geng, LÜ Jun-jie, LIU Jing-bao, GUO Tian-cai.
2021.
Distribution and accumulation of zinc and nitrogen in wheat grain pearling fractions in response to foliar zinc and soil nitrogen applications. Journal of Integrative Agriculture, 20(12): 3277-3288.
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