Relationship between Lotus Root Quality and Geochemical Conditions in the Xinken Lotus Root Producing Area of Guangzhou

GU Tao; ZHU Xiao-hua; ZHAO Xin-wen; JIANG Tuo; QIU Xiao-fei; ZHENG Xiao-zhan; SHUAI Qin

doi:10.15898/j.cnki.11-2131/td.202109290136

Rock and Mineral Analysis > 2021 > 40(6): 833-845. > DOI: 10.15898/j.cnki.11-2131/td.202109290136

GU Tao, ZHU Xiao-hua, ZHAO Xin-wen, JIANG Tuo, QIU Xiao-fei, ZHENG Xiao-zhan, SHUAI Qin. Relationship between Lotus Root Quality and Geochemical Conditions in the Xinken Lotus Root Producing Area of Guangzhou[J]. Rock and Mineral Analysis, 2021, 40(6): 833-845. DOI: 10.15898/j.cnki.11-2131/td.202109290136

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Relationship between Lotus Root Quality and Geochemical Conditions in the Xinken Lotus Root Producing Area of Guangzhou

1.
Key Laboratory of Eco-Geochemistry, Ministry of Natural Resources; National Research Center for Geoanalysis, Beijing 100037, China
2.
Research Center for Petrogenesis and Mineralization of Granitoid Rocks, China Geological Survey, Central South China Innovation Center for Geosciences, Wuhan 430205, China
3.
Faculty of Material Science and Chemistry, China University of Geosciences(Wuhan), Wuhan 430074, China
4.
Central South China Innovation Center for Geosciences, Wuhan 430205, China
5.
Geological Survey of Guangzhou, Guangzhou 510440, China

More Information

Received Date: September 28, 2021
Revised Date: November 04, 2021
Accepted Date: November 11, 2021
Published Date: November 27, 2021

Abstract

HIGHLIGHTS
(1) Chemical compositions of sediment, surface water and fresh lotus root in the Xinken area were systematically analyzed.

(2) The sediment and water environment of Xinken lotus root is generally clean, with low heavy metal contents and rich nutrient elements in sediment. The contents of B, Co, Fe, Mg, Mn, V, Ca and Ge in the sediment are high, which is beneficial to the accumulation of nutrients in lotus root.

(3) The absorption and enrichment capacity of Xinken lotus root for nutrient elements is greater than that for heavy metals.

ABSTRACT

BACKGROUNDEnvironmental geochemical conditions affect the quality of famous and special agricultural products. Xinken lotus root is the national product of geographical indication. Exploring the relationship between the geological background of the production area and the quality of lotus root is of great significance to the large-scale planting of Xinken lotus root.
OBJECTIVESTo reveal the correlation between the quality of lotus root and the environmental geochemical characteristics in the producing area.
METHODSSediment, surface water and fresh lotus root in the Xinken area were systematically sampled and analyzed.
RESULTSThe concentrations of nutrients, i.e., Mn, Zn, Mo, Co, V and Fe, in the sediment of the lotus root pond were high, in the first grade (rich) level. Selenium was mainly in proper amounts and high selenium grade. The concentrations of Cr, Cu, Hg, Ni, Pb and Zn were lower than those of the soil pollution risk threshold of agricultural land. Cu, Zn, Se, B, Hg, Cd, As, Cr(Ⅵ), Pb and Ni in surface water of the lotus pond met the requirement for irrigation water quality. The lotus root was rich in starch, soluble sugar, K, P, Ca, Mg, Fe, Zn and Se, and the contents of heavy metals and crude fiber were low. The average bioaccumulation coefficients of lotus root for different elements ranged from 0.0484 to 65.67. The enrichment ability of P was the strongest and that of Ge was the weakest. There was a significant positive correlation between B and starch in lotus root pond sediment (p ≤ 0.05), between Ca and protein, while a significant negative correlation between As and soluble sugar. The contents of B, Co, Fe, Mg, Mn, V, Ca and Ge in the sediment of the lotus pond were high, which was beneficial to the accumulation of nutrients in lotus root, and thus production of safe and high-quality lotus roots.
CONCLUSIONSImportance should be attached to the supplement of organic matter, Ca, N and Ge in the lotus pond during the planting process and more attention to the potential ecological security risks caused by Cd and As.

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Relationship between Lotus Root Quality and Geochemical Conditions in the Xinken Lotus Root Producing Area of Guangzhou