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拔节期土壤施锌对小麦籽粒中锌生物有效性影响评估
王张民1, 潘 斐1, 刘 琦1, 袁林喜1, 段增强2, 尹雪斌1
1.江苏省硒生物工程技术研究中心;2.土壤与农业可持续发展国家重点实验室 (中国科学院南京土壤研究所)
摘要:
本研究通过2012—2013及2013—2014两个年度的田间试验,在小麦(扬麦-16)的拔节期土壤施加高用量的锌肥,通过植酸/锌摩尔比法,对小麦籽粒进行了锌生物有效性评价,每公顷施ZnSO4.7H2O的量达到300 kg能显著提高小麦籽粒锌含量,小麦籽粒锌含量达到60 mg/kg以上,小麦籽粒植酸/锌摩尔比显著降低,植酸/锌摩尔比最大可降低至15以下,表明小麦锌强化后籽粒中锌的生物有效性得到显著提高。
关键词:  小麦  锌肥  籽粒锌含量  植酸/锌摩尔比  生物有效性
DOI:10.13758/j.cnki.tr.2018.06.026
分类号:S512;Q945.14;TS202.1
基金项目:山西省农谷建设科研专项(SXNGJSKYZX201706)和山西省重点研发计划重点项目(201703D211001-01-02)资助。
Effect of Zinc Application at Jointing Stage on Zinc Bioavailability in Wheat Grain
WANG Zhangmin1, PAN Fei1, LIU Qi1, YUAN Linxi1, DUAN Zengqiang2, YIN Xuebin1
1.Jiangsu Bio-Engineering Research Center for Selenium;2.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences
Abstract:
In this study, a two-year field experiment was conducted and the molar ratio of phytic acid/zinc was used to explore and assess the effects of zinc (Zn) fertilization on Zn bioavailability in wheat grains (Triticum aestivum Linn. cv. Yang Mai 16) by applying increasing rates of Zn fertilizers during the jointing stage. The results showed that Zn concentration in wheat grains was significantly increased while the molar ratio of phytic acid/Zn was significantly decreased with increasing rate of Zn fertilizer. Under 300 kg/hm2 of ZnSO4.7H2O, Zn concentration in wheat grains was increased to over 60 mg/kg and the molar ratio of phytic acid/Zn decreased to below 15. It indicated that Zn bioavailability in wheat grains is significantly improved when wheat is fortified with Zn.
Key words:  Wheat  Zinc fertilizer  Zinc concentration in wheat grains  Molar ratio of phytic acid/zinc  Bioavailability

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