Journal of Integrative Agriculture ›› 2017, Vol. 16 ›› Issue (07): 1617-1623.DOI: 10.1016/S2095-3119(17)61657-5

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LI Meng, TIAN Xiao-hong, LI Xiu-li, WANG Shao-xia   

  • 收稿日期:2016-11-21 出版日期:2017-07-20 发布日期:2017-07-06

Effect of Zn application methods on Zn distribution and bioavailability in wheat pearling fractions of two wheat genotypes

LI Meng1, TIAN Xiao-hong2, LI Xiu-li2, WANG Shao-xia2   

  1. 1 Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education/College of Hydraulic&Environmental Engineering, China Three Gorges University, Yichang 443002, P.R.China
    2 Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture/College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, P.R.China
  • Received:2016-11-21 Online:2017-07-20 Published:2017-07-06
  • Contact: Correspondence TIAN Xiao-hong, Tel: +86-29-87082948, E-mail: txhong@hotmail.com
  • About author:LI Meng, Mobie: +86-15571706718, E-mail: renyaxi520@126.com;
  • Supported by:

    This research was supported by the National Natural Science Foundation of China (41371288 and 31672233) and the National Key Technologies R&D Programs of China during the 12th Five-Year Plan period (2012BAD14B11).

Abstract: Pearling is an effective method for evaluating the distribution of chemical components in wheat grain. Five pearling fractions (representing approximately 20% of the original sample weight) of wheat grain were obtained using the JNMJ3 rice polisher for two cultivars with different methods of Zinc (Zn) application; the residual portion (approximately 80%) was ground as flour. Results showed that foliar or soil+foliar Zn application methods effectively increased Zn concentrations and bioavailability in whole grain and pearling fractions, but soil Zn application was ineffective in field conditions. In addition, the concentrations of Zn, Fe, Mn and Cu within wheat grain showed a diminishing trend from the outer layer to the inner portions of the wheat grain as the pearling level increased. These results clearly showed the distribution of minerals in wheat grain, especially in the outer part of the grain (bran). The results also suggest that precise milling techniques combined with foliar Zn application could improve the Zn and Fe nutritional qualities of consumed flour and mitigate human Zn and Fe deficiencies.

Key words: Zinc (Zn) ,  Zn bioavailability ,  wheat grain , pearling fraction