Zhao Ai-qing, Tian Xiao-hong, Cao Yu-xian, Lu Xin-chun, Liu Ting
College of Natural Resources and Environment, Northwest A&F University, Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, South Campus of Northwest A&F University, No 3 Taicheng Road, Yangling, 712100, Shaanxi, China.
J Sci Food Agric. 2014 Aug;94(10):2016-22. doi: 10.1002/jsfa.6518. Epub 2014 Jan 13.
The concentration of Zn and phytic acid in wheat grain has important implications for human health. We conducted field and greenhouse experiments to compare the efficacy of soil and foliar Zn fertilisation in improving grain Zn concentration and bioavailability in wheat (Triticum aestivum L.) grain grown on potentially Zn-deficient calcareous soil.
Results from the 2-year field experiment indicated that soil Zn application increased soil DTPA-Zn by an average of 174%, but had no significant effect on grain Zn concentration. In contrast, foliar Zn application increased grain Zn concentration by an average of 61%, and Zn bioavailability by an average of 36%. Soil DTPA-Zn concentrations varied depending on wheat cultivars. There were also significant differences in grain phytic acid concentration among the cultivars. A laboratory experiment indicated that Zn (from ZnSO4 ) had a low diffusion coefficient in this calcareous soil.
Compared to soil Zn application, foliar Zn application is more effective in improving grain Zn content of wheat grown in potentially Zn-deficient calcareous soils.
小麦籽粒中锌和植酸的含量对人体健康具有重要意义。我们开展了田间和温室试验，以比较在潜在缺锌的石灰性土壤上种植的小麦（普通小麦）施土施锌肥和叶面锌肥对提高籽粒锌含量及生物有效性的效果。
为期两年的田间试验结果表明，土壤施锌使土壤中DTPA - 锌平均增加了174%，但对籽粒锌含量没有显著影响。相比之下，叶面施锌使籽粒锌含量平均增加了61%，锌生物有效性平均增加了36%。土壤DTPA - 锌浓度因小麦品种而异。各品种间籽粒植酸浓度也存在显著差异。一项实验室试验表明，锌（硫酸锌中的锌）在这种石灰性土壤中的扩散系数较低。
与土壤施锌相比，叶面施锌在提高潜在缺锌石灰性土壤上种植的小麦籽粒锌含量方面更有效。
