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| Effects of Foliage Spraying of GeO2 on Germanium Accumulation and Nutritional Qualities of Garlic |
| QI Xiaofang1 ☆，LI Xiaxia1 ☆，LIU Zhongxiao2，CHENG Zhihui1* |
1College of Horticulture，Northwest A & F University，Yangling 712100，Shaanxi，China；2Institute of Vegetables and
Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China |
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Abstract Germanium is one of the important functional components of garlic．Garlic is naturaly rich
in germanium and possesses higher health efficacy and medicinal value．However，depending on natural
germanium preservation store could cause problems as lower content and unstable levels．Taking garlic cultivar
‘G110’ as test material，this experiment sprayed different concentrations of GeO2 solutions（3，6，9，12 mg ·
L-1） by different times（once，twice，third times）；and studied the effects of exogenous germanium on garlic
germanium accumulation and nutrient quality．The results showed that the exogenous germanium concentration
extremely significantly affected the germanium content of garlic scape and bulb，and the spraying frequency
and their interactions only influenced the germanium content in garlic scape significantly．The Ge content in
garlic scape reached 27.00 μg · kg-1 when spraying 12 mg · L-1 GeO2 once on the leaf surface. Ge content was
increased by 66.9% comparing with the contrast（0 mg · L-1）．At the same time，the soluble protein content of
garlic scape was higher．Among all treatment combinations，the Ge content of bulb reached the highest level
of 4.02 μg · kg-1 by spraying 9 mg · L-1 GeO2 once．Therefore，9-12 mg · L-1 GeO2 solution can be sprayed on
garlic leaves during seedling establishment period for cultivation of Ge-rich garlic．
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Received: 24 June 2020
Published: 07 January 2021
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