Enrichment of trace elements in soil-tea system in Meitan tea area of Guizhou and origin traceability

doi:10.3969/j.issn.1004-1524.2022.02.20

Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (2): 378-390.DOI: 10.3969/j.issn.1004-1524.2022.02.20

• Quality and Safety of Agricultural Products • Previous Articles Next Articles

Enrichment of trace elements in soil-tea system in Meitan tea area of Guizhou and origin traceability

ZHANG Peng¹^,²(), YANG Xueyan¹^,², HONG Jing¹^,², ZHANG Yali¹^,², TIAN Xiaojing¹^,²^,^*(), ZHANG Fumei², CAO Hong¹, CHEN Shi’en¹, MA Zhongren¹^,², DING Gongtao¹, SONG Li³, LUO Li³

1. College of Life Science and Engineering, Northwestern Minzu University, Lanzhou 730124, China
2. China-Malaysia National Joint Laboratory, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
3. Gannan Research Institute of Yak Milk, Hezuo 747000, Gansu, China

Received:2021-06-04 Online:2022-02-25 Published:2022-03-02
Contact: TIAN Xiaojing

Abstract

Abstract:

To study the migration and characteristics of trace elements in soil-tea system in Meitan tea area, Guizhou Province, tea leaves and soil from 12 villages including Xima Town and Yuquan Town in Meitan County were collected and contents of 11 trace elements including Ce, Co, Fe, La, Mg, Mn, Na, Ni, Pr, Se and Zn were detected by inductively coupled plasma optical emission spectrometer (ICP-OES). The results showed that average contents of Ni, Zn and other heavy metals in the soil were lower than the national limit standard, and the single pollution index (P_i) ≤1 and the index of geo-accumulation (I_geo) ≤0, indicated that Meitan tea area soil were not polluted. In addition, Meitan tea area met the requirements of selenium-rich soil, but the pollution indexes of Co, Pr and Ni were close to the pollution limit. Therefore, it was suggested that the tea area should reduce the emission of toxic and harmful substances containing Co, Pr and Ni, so as to solve the hidden danger of element pollution in the future and keep the soil clean. At the same time, according to the national standard, content of heavy metals in Meitan tea did not exceed the standard, and some tea areas in Meitan met the requirements of selenium-rich tea. It could also be seen that in the tea-soil-pH system, tea had positive or negative correlations with most elements in the upper and lower layers of soil, and pH value of the upper and lower layers of the soil was also positively or negatively correlated with contents of some elements in the soil. Enrichment ability of Mn element in the tea tree was strong, and the absorption of Mn element had a certain antagonistic effect on the absorption of Mg, Na, Ni, Pr, Co and Se. In this study, principal component analysis and canonical discriminant analysis were used to study the characteristics of the upper and lower layers of soil and tea in Meitan tea area. It was found that both principal component analysis and canonical discriminant analysis could distinguish the tea leaves and soil in the 12 tea areas, which not only realized the differentiation of soil in different tea areas, but also distinguished the upper and lower layers of the soil in the same tea area, and the data points in the canonical discriminant analysis showed better aggregation. The above results indicated that there were differences in the contents of trace elements in tea leaves and soil in different regions of Meitan tea area, with obvious characteristics. In this study, the characteristics of trace elements in the soil-tea system in Meitan tea area were systematically explored to provide a basis for the enrichment, migration and origin traceability of trace elements in the soil-tea system in Meitan tea area in Guizhou Province.

Key words: Meitan County, soil, tea, trace elements, enrichment, pollution index

CLC Number:

S571.1
X825

ZHANG Peng, YANG Xueyan, HONG Jing, ZHANG Yali, TIAN Xiaojing, ZHANG Fumei, CAO Hong, CHEN Shi’en, MA Zhongren, DING Gongtao, SONG Li, LUO Li. Enrichment of trace elements in soil-tea system in Meitan tea area of Guizhou and origin traceability[J]. Acta Agriculturae Zhejiangensis, 2022, 34(2): 378-390.

Figures/Tables 12

References 24

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编号 Serial number	取样地点 Sampling spot	样品数量 Sample quantity	经纬度 Latitude and longitude	茶叶简称 Abbreviation of tea	土壤上层简称 Abbreviation of upper soil layer	土壤下层简称 Abbreviation of lower soil layer
1	石莲镇Shilian town	5	27°25'42.77″N,107°25'3.79″E	SLC	SLTS	SLTX
2	复兴镇Fuxing town	5	27°59'48.16″N,107°37'18.15″E	FXC	FXTS	FXTX
3	新南镇Xinnan town	5	27°32'25.60″N,107°19'18.18″E	XNC	XNTS	XNTX
4	洗马乡Xima town	5	27°57'29.25″N,107°31'7.84″E	XMC	XMTS	XMTX
5	鱼泉镇Yuquan town	5	27°52'26.22″N,107°29'34.00″E	YQC	YQTS	YQTX
6	马山镇Mashan town	5	28°3'16.54″N,107°35'20.88″E	MSC	MSTS	MSTX
7	西河乡Xihe town	5	28°9'19.95″N,107°32'30.31″E	XHC	XHTS	XHTX
8	永兴镇Yongxing town	5	27°52'30.94″N,107°35'26.49″E	YXC	YXTS	YXTX
9	高台镇Gaotai town	5	27°37'13.25″N,107°23'21.92″E	GTC	GTTS	GTTX
10	抄乐镇Chaole town	5	27°40'30.97″N,107°34'6.49″E	CLC	CLTS	CLTX
11	湄江街道Meijiang street	5	27°46'22.01″N,107°28'59.33″E	MJC	MJTS	MJTX
12	黄家坝镇Huangjiaba town	5	27°44'22.12″N,E107°25'32.78″	HJC	HJTS	HJTX

编号 Serial number	取样地点 Sampling spot	样品数量 Sample quantity	经纬度 Latitude and longitude	茶叶简称 Abbreviation of tea	土壤上层简称 Abbreviation of upper soil layer	土壤下层简称 Abbreviation of lower soil layer
1	石莲镇Shilian town	5	27°25'42.77″N,107°25'3.79″E	SLC	SLTS	SLTX
2	复兴镇Fuxing town	5	27°59'48.16″N,107°37'18.15″E	FXC	FXTS	FXTX
3	新南镇Xinnan town	5	27°32'25.60″N,107°19'18.18″E	XNC	XNTS	XNTX
4	洗马乡Xima town	5	27°57'29.25″N,107°31'7.84″E	XMC	XMTS	XMTX
5	鱼泉镇Yuquan town	5	27°52'26.22″N,107°29'34.00″E	YQC	YQTS	YQTX
6	马山镇Mashan town	5	28°3'16.54″N,107°35'20.88″E	MSC	MSTS	MSTX
7	西河乡Xihe town	5	28°9'19.95″N,107°32'30.31″E	XHC	XHTS	XHTX
8	永兴镇Yongxing town	5	27°52'30.94″N,107°35'26.49″E	YXC	YXTS	YXTX
9	高台镇Gaotai town	5	27°37'13.25″N,107°23'21.92″E	GTC	GTTS	GTTX
10	抄乐镇Chaole town	5	27°40'30.97″N,107°34'6.49″E	CLC	CLTS	CLTX
11	湄江街道Meijiang street	5	27°46'22.01″N,107°28'59.33″E	MJC	MJTS	MJTX
12	黄家坝镇Huangjiaba town	5	27°44'22.12″N,E107°25'32.78″	HJC	HJTS	HJTX

地累积指数 Geoaccumulation index	分级 Grade	污染程度 Degree of pollution
I_geo<0	0级 Level 0	无污染 No pollution
0≤I_geo<1	1级 Level 1	无污染到中度污染 No pollution to moderate pollution
1≤I_geo<2	2级 Level 2	中度污染 Moderate pollution
2≤I_geo<3	3级 Level 3	中度污染到强污染 Moderate to strong pollution
3≤I_geo<4	4级 Level 4	强污染 Strong pollution
4≤I_geo<5	5级 Level 5	强污染到极强度污染 Heavy pollution to extreme pollution
I_geo≥5	6级 Level 6	极强污染 Extreme pollution

地累积指数 Geoaccumulation index	分级 Grade	污染程度 Degree of pollution
I_geo<0	0级 Level 0	无污染 No pollution
0≤I_geo<1	1级 Level 1	无污染到中度污染 No pollution to moderate pollution
1≤I_geo<2	2级 Level 2	中度污染 Moderate pollution
2≤I_geo<3	3级 Level 3	中度污染到强污染 Moderate to strong pollution
3≤I_geo<4	4级 Level 4	强污染 Strong pollution
4≤I_geo<5	5级 Level 5	强污染到极强度污染 Heavy pollution to extreme pollution
I_geo≥5	6级 Level 6	极强污染 Extreme pollution

元素 Element	波长 Wavelength/nm	标准曲线 Standard curve	相关系数 Related coefficient	相对标准偏差 Relative standard deviation/%
Ce	418.650	y=25 582.581 60x+80.983 22	0.999 80	1.40
Co	238.892	y=9 169.647 02x-2.911 69	0.999 95	1.64
Fe	238.204	y=24 370.335 46x+1 019.292 73	0.998 28	0.37
La	333.749	y=79 738.853 61x+191.108 87	0.999 91	0.40
Mg	279.553	y=540 801.988 11x+7 210.500 76	0.995 46	0.52
Mn	257.610	y=168 638.214 11x+1 366.033 78	0.994 44	1.57
Na	589.592	y=16 431.609 90x+1 368.538 55	0.999 18	0.76
Ni	231.604	y=2 826.810 90x+44.797 87	0.999 97	0.53
Pr	417.939	y=25 174.063 29x+26.575 91	0.999 85	2.05
Se	196.026	y=535.128 98x+7.540 62	0.999 95	3.68
Zn	213.857	y=25 455.363 07x+148.422 21	0.999 93	0.35

Enrichment of trace elements in soil-tea system in Meitan tea area of Guizhou and origin traceability

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土壤	样品	Ce	Co	Fe	La	Mg	Mn	Na	Ni	Pr	Se	Zn
Soil	Sample
上层 Upper	SLTS	12.96 ±0.16 d	14.33 ±0.34 d	18 152 ±91.49 d	7.40 ±0.03 c	294.84 ±3.30 j	13.50 ±0.07 a	137.52 ±0.86 d	10.94 ±0.14 h	4.51 ±0.11 e	16.69 ±0.76 c	23.51 ±0.10 d
layers	FXTS	6.72 ±0.02 g	6.13 ±0.36 g	14 922 ±35.64 g	3.85 ±0.01 l	260.62 ±0.72 k	0.15 ±0.01 i	63.68 ±0.29 j	10.11 ±0.09 j	2.52 ±0.01 h	15.77 ±0.10 d	7.19 ±0.12 h
	XNTS	7.35 ±0.09 f	11.87 ±0.44 f	15 212 ±37.01 f	5.92 ±0.03 g	646.52 ±2.70 c	4.35 ±0.02 g	116.54 ±0.53 f	11.12 ±0.21 g	4.49 ±0.03 e	16.19 ±0.18 cd	8.12 ±0.12 f
	XMTS	4.56 ±0.051 k	14.68 ±0.47 cd	13 174 ±20.74 k	5.19 ±0.02 i	590.8 ±2.82 e	4.63 ±0.04 e	196.8 ±0.35 b	17.24 ±0.07 a	4.12 ±0.02 f	16.75 ±0.49 c	6.63 ±0.09 j
	YQTS	13.91 ±0.03 a	15.12 ±0.47 bc	18 534 ±86.78 c	7.94 ±0.01 b	303.66 ±1.33 i	12.42 ±0.11 b	137.1 ±0.76 d	11.01 ±0.12 gh	4.78 ±0.04 c	16.37 ±0.75 cd	24.42 ±0.10 b
	MSTS	1.71 ±0.05 l	4.57 ±0.68 h	13 638 ±63.80 j	4.29 ±0.02 k	395.48 ±1.64 f	0.03 ±0.01 j	108.98 ±0.31 g	14.25 ±0.13 d	2.50 ±0.03 h	16.64 ±0.25 c	2.25 ±0.07 k
	XHTS	7.88 ±0.1 e	3.93 ±0.61 i	15 242 ±54.04 f	4.40 ±0.02 j	337.94 ±1.57 g	0.02 ±0.01 j	97.94 ±0.36 i	10.43 ±0.04 i	3.16 ±0.04 g	15.90 ±0.28 d	6.83 ±0.07 i
	YXTS	5.83 ±0.03 i	12.38 ±0.20 f	14 306 ±23.02 h	6.05 ±0.02 f	764.84 ±2.30 a	4.56 ±0.03 ef	100.17 ±0.37 h	13.90 ±0.04 e	4.61 ±0.08 d	15.75 ±0.33 e	7.05 ±0.15 h
	GTTS	13.11 ±0.03 c	13.35 ±0.50 e	19 806 ±84.44 a	7.31 ±0.03 d	303.3 ±2.69 i	10.59 ±0.13 c	116.82 ±0.52 f	9.24 ±0.23 k	4.96 ±0.08 b	18.81 ±0.44 a	23.80 ±0.18 c
	CLTS	6.53 ±0.06 h	14.99 ±0.48 bc	15 798 ±27.75 e	7.19 ±0.02 e	656.08 ±2.97 b	3.95 ±0.06 h	185.90 ±0.22 c	16.37 ±0.06 b	5.10 ±0.03 a	18.66 ±0.50 a	10.93 ±0.11 e
	MJTS	13.66 ±0.12 b	15.46 ±0.30 b	18 660 ±76.49 b	8.72 ±0.46 a	310.8 ±1.57 h	7.11 ±0.04 d	131.86 ±0.57 e	12.10 ±0.19 f	5.01 ±0.02 b	17.55 ±0.38 b	26.20 ±0.25 a
	HJTS	5.70 ±0.05 j	16.13 ±0.19 a	14 114 ±30.50 i	5.69 ±0.01 h	595.1 ±1.23 d	4.54 ±0.01 f	200.98 ±0.29 a	14.97 ±0.07 c	4.19 ±0.04 f	19.13 ±0.86 a	7.74 ±0.05 g
下层 Lower	SLTX	2.8 ±0.04 k	15.23 ±0.32 b	13 042 ±27.75 j	5.21 ±0.01 f	681.98 ±4.85 a	4.62 ±0.02 d	166.48 ±0.41 e	15.81 ±0.08 b	4.30 ±0.02 c	16.74 ±0.32 c	9.39 ±0.06 c
layers	FXTX	12.37 ±0.05 a	6.15 ±0.26 e	18 130 ±82.76 a	6.24 ±0.029 c	179.02 ±1.04 k	0.44 ±0.01 g	119.66 ±0.56 j	10.62 ±0.06 j	3.0 ±0.07 h	16.98 ±0.26 c	21.22 ±0.08 a
	XNTX	7.89 ±0.03 c	14.68 ±0.23 c	15 936 ±28.81 c	6.95 ±0.02 a	671.42 ±6.56 b	4.77 ±0.01 c	133.4 ±0.61 h	15.48 ±0.08 c	4.89 ±0.04 a	18.00 ±0.41 ab	7.22 ±0.04 h
	XMTX	4.31 ±0.07 h	14.91 ±0.16 bc	13 178 ±44.94 i	4.96 ±0.01 g	592.08 ±1.80 c	4.41 ±0.07 e	173.6 ±0.48 d	12.74 ±0.08 e	4.14 ±0.03 d	17.58 ±0.19 b	5.25 ±0.12 i
	YQTX	6.72 ±0.04 e	16.08 ±0.37 a	15 272 ±27.75 e	6.28 ±0.03 b	589.8 ±1.22 c	4.86 ±0.04 b	188.24 ±0.55 c	15.99 ±0.09 a	4.41 ±0.09 b	17.78 ±0.34 b	10.74 ±0.09 b
	MSTX	3.89 ±0.11 j	4.66 ±0.32 f	13 982 ±81.36 g	4.66 ±0.02 i	432.02 ±1.81 g	0.28 ±0.01 h	106.58 ±0.40 k	14.68 ±0.12 d	2.86 ±0.06 i	16.14 ±0.17 d	4.512 ±0.05 j
	XHTX	8.86 ±0.1 b	3.66 ±0.27 h	15 374 ±28.81 d	4.61 ±0.01 j	302 ±0.57 i	0.24 ±0.01 h	121.62 ±0.22 i	9.36 ±0.08 l	3.27 ±0.07 f	16.08 ±0.44 d	7.78 ±0.06 e
	YXTX	6.37 ±0.15 f	3.76 ±0.19 gh	14 844 ±36.47 f	4.55 ±0.03 k	369.4 ±1.44 h	0.04 ±0.01 i	199.56 ±0.25 b	12.03 ±0.06 g	3.19 ±0.36 g	16.56 ±0.38 cd	7.35 ±0.15 g
	GTTX	1.22 ±0.06 l	4.14 ±0.39 g	12 568 ±48.17 k	2.97 ±0.01 l	210.62 ±0.80 j	0.03 ±0.01 i	80.15 ±0.16 l	9.71 ±0.09 k	1.74 ±0.02 j	15.11 ±0.57 e	2.42 ±0.06 k
	CLTX	4.04 ±0.03 i	12.27 ±0.33 d	13 302 ±21.68 h	4.91 ±0.01 h	517.82 ±1.83 e	3.29 ±0.01 f	213.14 ±0.30 a	11.32 ±0.10 h	3.61 ±0.03 e	13.97 ±0.52 f	9.40 ±0.05 c
	MJTX	7.15 ±0.10 d	14.89 ±0.24 bc	16 032 ±59.33 b	5.88 ±0.02 d	500.16 ±2.58 f	5.2 ±0.82 a	145.86 ±1.11 g	11.20 ±0.06 i	4.32 ±0.09 c	16.93 ±0.62 c	8.72 ±0.03 d
	HJTX	6.04 ±0.06 g	14.91 ±0.38 bc	14 832 ±28.64 f	5.56 ±0.02 e	541.58 ±0.49 d	4.66 ±0.02 d	149.78 ±0.43 f	12.24 ±0.07 f	4.31 ±0.02 c	18.31 ±0.39 a	7.66 ±0.12 f

样品	Ce	Co	Fe	La	Mg	Mn	Na	Ni	Pr	Se	Zn
Sample
SLC	0.023 ±0.003 de	0.180 ±0.013 b	5.061 ±0.027 a	0.209 ±0.006 g	190.910 ±4.443 b	48.015 ±0.142 a	16.046 ±0.057 b	1.895 ±0.046 a	0.263 ±0.006 g	0.244 ±0.013 bc	4.622 ±0.026 a
FXC	0.015 ±0.003 f	0.211 ±0.007 a	4.083 ±0.032 b	0.260 ±0.004 ef	193.385 ±0.705 a	44.505 ±0.174 b	17.801 ±0.094 a	1.526 ±0.038 b	0.348 ±0.007 a	0.289 ±0.065 b	3.198 ±0.024 b
XNC	0.038 ±0.005 b	0.043 ±0.008 e	1.445 ±0.025 c	0.257 ±0.003 f	101.965 ±0.189 c	12.207 ±0.027 c	6.533 ±0.105 c	0.623 ±0.025 c	0.294 ±0.007 e	0.092 ±0.029 gh	1.439 ±0.010 c
XMC	0.013 ±0.002 f	0.065 ±0.006 cd	1.061 ±0.015 d	0.263 ±0.003 e	91.760 ±0.604 d	10.545 ±0.044 f	2.710 ±0.046 e	0.494 ±0.016 ef	0.279 ±0.004 f	0.114 ±0.007 fg	1.333 ±0.027 d
YQC	0.022 ±0.005 e	0.038 ±0.007 e	1.063 ±0.020 d	0.273 ±0.003 d	90.345 ±0.548 d	10.512 ±0.041 f	1.916 ±0.054 j	0.541 ±0.045 d	0.312 ±0.013 cd	0.059 ±0.008 h	0.934 ±0.023 i
MSC	0.013 ±0.004 f	0.039 ±0.008 e	0.782 ±0.009 f	0.277 ±0.004 bcd	90.365 ±0.792 d	10.986 ±0.055 e	3.919 ±0.067 d	0.455 ±0.029 gh	0.319 ±0.007 bc	0.116 ±0.021 fg	0.641 ±0.063 j
XHC	0.040 ±0.004 ab	0.024 ±0.005 f	0.820 ±0.025 e	0.278 ±0.001 bc	90.345 ±0.465 d	9.928 ±0.079 h	2.574 ±0.087 f	0.467 ±0.027 fgh	0.312 ±0.004 cd	0.208 ±0.026 cd	1.080 ±0.029 g
YXC	0.036 ±0.005 b	0.038 ±0.010 e	0.611 ±0.014 h	0.279 ±0.004 bc	78.140 ±0.274 f	12.215 ±0.067 c	2.392 ±0.078 h	0.487 ±0.012 efg	0.311 ±0.009 cd	0.130 ±0.021 fg	1.170 ±0.004 f
GTC	0.045 ±0.006 a	0.037 ±0.004 e	0.643 ±0.017 g	0.281 ±0.003 ab	90.275 ±0.439 d	10.289 ±0.047 g	2.211 ±0.034 i	0.441 ±0.017 hi	0.325 ±0.013 b	0.185 ±0.038 ed	1.281 ±0.023 e
CLC	0.029 ±0.006 c	0.060 ±0.005 d	0.094 ±0.011 k	0.284 ±0.001 a	81.875 ±0.312 e	9.120 ±0.030 i	1.542 ±0.058 k	0.414 ±0.021 i	0.341 ±0.009 a	0.365 ±0.097 a	1.031 ±0.018 h
MJC	0.028 ±0.003 cd	0.068 ±0.005 cd	0.280 ±0.012 j	0.275 ±0.004 cd	65.395 ±0.353 g	11.187 ±0.027 d	0.839 ±0.036 l	0.412 ±0.035 i	0.308 ±0.005 d	0.210 ±0.029 cd	1.016 ±0.008 h
HJC	0.038 ±0.003 b	0.071 ±0.009 c	0.462 ±0.025 i	0.281 ±0.001 ab	82.825 ±0.460 e	9.216 ±0.054 i	2.487 ±0.044 g	0.510 ±0.014 de	0.316 ±0.006 bcd	0.147 ±0.027 ef	1.070 ±0.019 g

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