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Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations

Nitrogen (N) is critical for zinc (Zn) accumulation in winter wheat grain via enhancing Zn absorption into plant roots. This paper explored a possible mechanism for enhanced absorption of Zn in winter wheat by N combined with Zn application based on the Zn bio-availability in soil. A pot experiment...

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Autores principales: Liu, Hongen, Zhao, Peng, Qin, Shiyu, Nie, Zhaojun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6194150/
https://www.ncbi.nlm.nih.gov/pubmed/30369940
http://dx.doi.org/10.3389/fpls.2018.01489
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author Liu, Hongen
Zhao, Peng
Qin, Shiyu
Nie, Zhaojun
author_facet Liu, Hongen
Zhao, Peng
Qin, Shiyu
Nie, Zhaojun
author_sort Liu, Hongen
collection PubMed
description Nitrogen (N) is critical for zinc (Zn) accumulation in winter wheat grain via enhancing Zn absorption into plant roots. This paper explored a possible mechanism for enhanced absorption of Zn in winter wheat by N combined with Zn application based on the Zn bio-availability in soil. A pot experiment with three N application rates (0.05, 0.2, and 0.4 g kg(-1)), two Zn application rates (0 and 10 mg kg(-1)), without and with plants was conducted. The results showed that high N (N(0.2) and N(0.4)) combined with Zn (Zn(10)) application significantly increased the yield, yield components and Zn and N concentrations in winter wheat shoots and grain. The available Zn concentration in soil with and without plants was increased by N(0.2)Zn(10) and N(0.4)Zn(10) treatment at each growth stage. N(0.2)Zn(10) and N(0.4)Zn(10) treatment significantly decreased the pH in soil without plants but had different influences on the pH in soil with plants, which depended on the different N application rates and growth stages. Meanwhile, N(0.2)Zn(10) and N(0.4)Zn(10) treatment decreased the exchangeable Zn but increased loose organic-, carbonate- and Fe-Mn oxides-bound Zn concentrations in soil without plants. The exchangeable, loose organic- and carbonate-bound Zn concentrations in soil with plants was increased by N(0.2)Zn(10) and N(0.4)Zn(10) treatment at different growth stages. Different rates of N combined with Zn application influenced the proportion of Zn in different fractions in soil with and without plants at different growth stages. At Zn(10), N(0.4) treatment showed higher yield, N and Zn concentrations in shoot and grain, and available Zn concentration in soil, but lower pH in soil than N(0.2) treatment. In addition, soil without plants had higher available Zn concentrations and lower pH than did the soil with plants. There were significant differences in Zn chemical fractions concentrations and proportions between the soils with and without plants at each growth stage. Therefore, combined influence of roots and the combination of N and Zn (especially N(0.4)Zn(10) treatment) improved the bio-availability of Zn in soil via changing the soil pH and promoting the transformation and distribution of Zn in different fractions.
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spelling pubmed-61941502018-10-26 Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations Liu, Hongen Zhao, Peng Qin, Shiyu Nie, Zhaojun Front Plant Sci Plant Science Nitrogen (N) is critical for zinc (Zn) accumulation in winter wheat grain via enhancing Zn absorption into plant roots. This paper explored a possible mechanism for enhanced absorption of Zn in winter wheat by N combined with Zn application based on the Zn bio-availability in soil. A pot experiment with three N application rates (0.05, 0.2, and 0.4 g kg(-1)), two Zn application rates (0 and 10 mg kg(-1)), without and with plants was conducted. The results showed that high N (N(0.2) and N(0.4)) combined with Zn (Zn(10)) application significantly increased the yield, yield components and Zn and N concentrations in winter wheat shoots and grain. The available Zn concentration in soil with and without plants was increased by N(0.2)Zn(10) and N(0.4)Zn(10) treatment at each growth stage. N(0.2)Zn(10) and N(0.4)Zn(10) treatment significantly decreased the pH in soil without plants but had different influences on the pH in soil with plants, which depended on the different N application rates and growth stages. Meanwhile, N(0.2)Zn(10) and N(0.4)Zn(10) treatment decreased the exchangeable Zn but increased loose organic-, carbonate- and Fe-Mn oxides-bound Zn concentrations in soil without plants. The exchangeable, loose organic- and carbonate-bound Zn concentrations in soil with plants was increased by N(0.2)Zn(10) and N(0.4)Zn(10) treatment at different growth stages. Different rates of N combined with Zn application influenced the proportion of Zn in different fractions in soil with and without plants at different growth stages. At Zn(10), N(0.4) treatment showed higher yield, N and Zn concentrations in shoot and grain, and available Zn concentration in soil, but lower pH in soil than N(0.2) treatment. In addition, soil without plants had higher available Zn concentrations and lower pH than did the soil with plants. There were significant differences in Zn chemical fractions concentrations and proportions between the soils with and without plants at each growth stage. Therefore, combined influence of roots and the combination of N and Zn (especially N(0.4)Zn(10) treatment) improved the bio-availability of Zn in soil via changing the soil pH and promoting the transformation and distribution of Zn in different fractions. Frontiers Media S.A. 2018-10-12 /pmc/articles/PMC6194150/ /pubmed/30369940 http://dx.doi.org/10.3389/fpls.2018.01489 Text en Copyright © 2018 Liu, Zhao, Qin and Nie. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Liu, Hongen
Zhao, Peng
Qin, Shiyu
Nie, Zhaojun
Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations
title Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations
title_full Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations
title_fullStr Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations
title_full_unstemmed Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations
title_short Chemical Fractions and Availability of Zinc in Winter Wheat Soil in Response to Nitrogen and Zinc Combinations
title_sort chemical fractions and availability of zinc in winter wheat soil in response to nitrogen and zinc combinations
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6194150/
https://www.ncbi.nlm.nih.gov/pubmed/30369940
http://dx.doi.org/10.3389/fpls.2018.01489
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