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The Effectiveness of Foliar Applications of Zinc and Biostimulants to Increase Zinc Concentration and Bioavailability of Wheat Grain

by 1, 2,3,* and 1,*
1
College of Resources and Environment, Qingdao Agriculture University, Qingdao 266109, Shandong, China
2
College of Natural Resources and Environment, Northwest A&F University, No 3, Taicheng Road, Yangling 712100, Shaanxi, China
3
Key Laboratory of Plant Nutrition and the Agr-environment in Northwest China, Ministry of Agriculture, Yangling 712100, Shaanxi, China
*
Authors to whom correspondence should be addressed.
Agronomy 2020, 10(2), 178; https://doi.org/10.3390/agronomy10020178
Received: 26 December 2019 / Revised: 23 January 2020 / Accepted: 23 January 2020 / Published: 26 January 2020
Increasing zinc (Zn) concentration in wheat grain is an important global challenge due to high incidence of Zn deficiency in human populations. In this study, a two-year field experiment was conducted to investigate the effects of foliar ZnSO4 combined with various biostimulants (fulvic acid (FA), seaweed extract (SE), amino acids (AA), and microbial incubates (MI)) on Zn concentration and bioavailability in wheat grain under different soil nitrogen (N) levels (0, 120, and 240 kg N/ha). Grain Zn concentration and bioavailability were significantly enhanced by foliar Zn plus various biostimulants and soil N supply. Compared to foliar Zn alone, foliar Zn + FA resulted in 16% increase in grain Zn, mainly from insoluble Zn increases, while foliar Zn + AA caused 11% increase in grain Zn, mainly from soluble (at N0) and insoluble Zn increases (at N120). Foliar Zn + FA and Zn + AA generally resulted in higher Zn bioavailability than foliar Zn alone. Additionally, N concentration and Fe concentration and bioavailability in grain were enhanced with foliar Zn + AA and soil N application. Thus, foliar ZnSO4 plus FA and AA under optimal soil N rate (120 kg N/ha) can be an effective and economically friendly approach for achieving agronomic biofortification. View Full-Text
Keywords: zinc; biostimulants; foliar application; wheat grain; Zn forms zinc; biostimulants; foliar application; wheat grain; Zn forms
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MDPI and ACS Style

Wang, S.; Tian, X.; Liu, Q. The Effectiveness of Foliar Applications of Zinc and Biostimulants to Increase Zinc Concentration and Bioavailability of Wheat Grain. Agronomy 2020, 10, 178. https://doi.org/10.3390/agronomy10020178

AMA Style

Wang S, Tian X, Liu Q. The Effectiveness of Foliar Applications of Zinc and Biostimulants to Increase Zinc Concentration and Bioavailability of Wheat Grain. Agronomy. 2020; 10(2):178. https://doi.org/10.3390/agronomy10020178

Chicago/Turabian Style

Wang, Shaoxia, Xiaohong Tian, and Qing Liu. 2020. "The Effectiveness of Foliar Applications of Zinc and Biostimulants to Increase Zinc Concentration and Bioavailability of Wheat Grain" Agronomy 10, no. 2: 178. https://doi.org/10.3390/agronomy10020178

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