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Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (12): 13-17.doi: 10.11924/j.issn.1000-6850.casb18120074

Special Issue: 小麦

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NPK Fertilizer Application on Global Wheat Grain Zinc Concentration

  

  • Received:2018-12-18 Revised:2019-04-04 Accepted:2019-01-25 Online:2019-04-26 Published:2019-04-26

Abstract: Improving grain Zn concentration of wheat could supply more Zn and reduce Zn deficiency in human body. To quantify the changes of global grain Zn concentration with time and analyze the relationship between grain Zn concentration and fertilization supply are significant to the sustainable development of agricultural production. The data were collected from Web of Science, CNKI and Wanfang database, which included 84 literatures related to grain Zn concentration from 1980 to 2018. The authors analyzed Zn concentration in grain, NPK application amount, and the relationship between the two to study the effect of NPK application on grain Zn concentration. The results showed that the global grain Zn concentration of wheat significantly decreased from 39.6 mg/kg in 1990s to 28.8 mg/kg at present with a decreasing rate of 26.5%. In wheat production, N fertilizer application increased from 84.1 kg/hm2 in 1990s to 166 kg/hm2, while P application increased by 127%, and K fertilizer increased by 19.8% from 2000s to now. N application increased grain Zn concentration of wheat, while P application significantly decreased grain Zn concentration and K fertilizer had no effect on grain Zn concentration. Therefore, large amount of P fertilizer application may reduce grain Zn concentration in intensive wheat production, and appropriate amount of P could guarantee the high yield and high Zn of wheat.

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