Effects of foliar control agents on cadmium enrichment characteristics of rice in karst area in central Guizhou

doi:10.3969/j.issn.1004-1524.2021.09.15

Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (9): 1710-1719.DOI: 10.3969/j.issn.1004-1524.2021.09.15

• Environmental Science • Previous Articles Next Articles

Effects of foliar control agents on cadmium enrichment characteristics of rice in karst area in central Guizhou

WANG Can¹(), FU Tianling², GONG Sitong², LOU Fei¹, ZHOU Kai³, DAI Liangyu⁴, LIU Jing⁴, LIN Dasong⁵, HE Tengbing¹^,²^,^*()

1. College of Agriculture, Guizhou University, Guiyang 550025, China
2. Institute of New Rural Development, Guizhou University, Guiyang 550025, China
3. Bureau of Agriculture and Rural Affairs of Kaiyang County, Kaiyang 550399, China
4. Guizhou Provincial Agricultural Ecology and Resources Protection Station, Guiyang 550001, China
5. Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China

Received:2021-01-09 Online:2021-09-25 Published:2021-10-09
Contact: HE Tengbing

Abstract

Abstract:

To screen suitable foliar control agents for rice production on Cd contaminated soil in karst area of Guizhou, field experiments were carried out in typical paddy fields with excessive Cd in central Guizhou. Five foliar control agents were sprayed at tillering and heading stages as treatments, denoted as SI, SE, GWY, FE, ZN, respectively, with no foliar control agent applied as control (CK). Rice plant samples were collected at mature stage to explore the effects of foliar control agents on Cd migration and translocation in various parts of rice. It was shown that application of foliar control agents had no significant effect on soil pH, organic matter and Cd content. Under the treatment of SE, GWY, ZN and SI, the rice yield was significantly (P<0.05) increased than that of CK by 13.56%, 5.77%, 5.74% and 7.30%, respectively. Compared with CK, the highest reduction rate of Cd in brown rice was found under Zn treatment (56.5%), which was followed by the treatment of SE (52.3%) and GWY (39.4%). Compared with CK, the enrichment coefficient of Cd in stem nodes was decreased by 44.8% under SE treatment; the enrichment coefficient of Cd in panicle axis and brown rice was decreased by 55.0% and 58.0%, respectively, under ZN treatment; the enrichment coefficient of Cd in leaf was increased by 133.7% under SI treatment. The Cd transport coefficient from branch to rice husk was decreased by 65.8% and 40.8% under the treatment of SE and SI as compared with CK. In conclusion, the treatment of SE, GWY and ZN could increase rice yield, decrease Cd content in brown rice, and regulate the enrichment and transport of Cd in various parts of rice plant. Thus, these foliar control agents could be used to safeguard the utilization of Cd-contaminated cultivated land in central Guizhou.

Key words: rice, foliar control agent, cadmium enrichment, cadmium translocation

CLC Number:

S482.8
S511

WANG Can, FU Tianling, GONG Sitong, LOU Fei, ZHOU Kai, DAI Liangyu, LIU Jing, LIN Dasong, HE Tengbing. Effects of foliar control agents on cadmium enrichment characteristics of rice in karst area in central Guizhou[J]. Acta Agriculturae Zhejiangensis, 2021, 33(9): 1710-1719.

Figures/Tables 7

References 38

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处理 Treatment	pH	有机质 Organic matter/(g·kg^-1)	Cd/(mg·kg^-1)	Zn(mg·kg^-1)	Fe/(g·kg^-1)	Si/(g·kg^-1)
CK	6.52±0.45	49.93±0.23 ab	0.76±0.02	140.30±2.08 b	15.31±0.17 c	25.88±0.82
SE	6.37±0.20	48.15±0.59 ab	0.75±0.05	139.47±1.15 b	15.76±0.14 bc	24.98±0.37
GWY	6.35±0.18	48.20±1.79 ab	0.76±0.01	157.78±3.38 a	16.68±0.39 b	23.92±0.69
SI	6.38±0.26	52.20±6.34 a	0.73±0.05	149.03±3.75 ab	15.62±0.08 bc	25.32±0.20
ZN	6.28±0.09	49.50±0.35 ab	0.78±0.04	146.36±3.08 b	15.54±0.40 bc	23.27±0.55
FE	6.32±0.08	45.70±3.16 b	0.81±0.04	159.28±1.85 a	18.11±0.38 a	25.35±0.26

处理 Treatment	pH	有机质 Organic matter/(g·kg^-1)	Cd/(mg·kg^-1)	Zn(mg·kg^-1)	Fe/(g·kg^-1)	Si/(g·kg^-1)
CK	6.52±0.45	49.93±0.23 ab	0.76±0.02	140.30±2.08 b	15.31±0.17 c	25.88±0.82
SE	6.37±0.20	48.15±0.59 ab	0.75±0.05	139.47±1.15 b	15.76±0.14 bc	24.98±0.37
GWY	6.35±0.18	48.20±1.79 ab	0.76±0.01	157.78±3.38 a	16.68±0.39 b	23.92±0.69
SI	6.38±0.26	52.20±6.34 a	0.73±0.05	149.03±3.75 ab	15.62±0.08 bc	25.32±0.20
ZN	6.28±0.09	49.50±0.35 ab	0.78±0.04	146.36±3.08 b	15.54±0.40 bc	23.27±0.55
FE	6.32±0.08	45.70±3.16 b	0.81±0.04	159.28±1.85 a	18.11±0.38 a	25.35±0.26

处理 Treatment	根 Root	茎 Stem	茎节 Stem node	叶 Leaf	穗轴 Cob	枝梗 Branch	稻壳 Rice husk	糙米 Brown rice
CK	3.340 ±0.284	3.144 ±0.497	14.686 ±3.117 ab	0.715 ±0.109 b	2.959 ±0.267 ab	1.137 ±0.160	0.351 ±0.038	0.671 ±0.030 ab
SE	2.987 ±0.394	2.675 ±0.797	8.111 ±2.006 b	0.799 ±0.242 ab	3.564 ±1.345 ab	0.645 ±0.340	0.158 ±0.075	0.339 ±0.165 ab
GWY	3.815 ±0.228	2.968 ±0.378	12.590 ±0.852 ab	0.830 ±0.198 ab	2.386 ±1.147 ab	1.027 ±0.306	0.205 ±0.043	0.408 ±0.107 ab
SI	4.903 ±0.586	4.390 ±0.455	18.929 ±3.440 a	1.671 ±0.219 a	5.103 ±0.468 a	1.261 ±0.439	0.365 ±0.065	0.735 ±0.099 a
ZN	4.466 ±0.140	2.887 ±0.315	11.584 ±2.562 ab	0.556 ±0.126 b	1.332 ±0.309 b	0.706 ±0.431	0.120 ±0.013	0.282 ±0.039 b
FE	4.507 ±0.861	4.477 ±1.401	13.299 ±2.211 ab	1.394 ±0.486 ab	4.387 ±0.990 ab	1.331 ±0.487	0.333 ±0.128	0.598 ±0.199 ab

处理 Treatment	根 Root	茎 Stem	茎节 Stem node	叶 Leaf	穗轴 Cob	枝梗 Branch	稻壳 Rice husk	糙米 Brown rice
CK	3.340 ±0.284	3.144 ±0.497	14.686 ±3.117 ab	0.715 ±0.109 b	2.959 ±0.267 ab	1.137 ±0.160	0.351 ±0.038	0.671 ±0.030 ab
SE	2.987 ±0.394	2.675 ±0.797	8.111 ±2.006 b	0.799 ±0.242 ab	3.564 ±1.345 ab	0.645 ±0.340	0.158 ±0.075	0.339 ±0.165 ab
GWY	3.815 ±0.228	2.968 ±0.378	12.590 ±0.852 ab	0.830 ±0.198 ab	2.386 ±1.147 ab	1.027 ±0.306	0.205 ±0.043	0.408 ±0.107 ab
SI	4.903 ±0.586	4.390 ±0.455	18.929 ±3.440 a	1.671 ±0.219 a	5.103 ±0.468 a	1.261 ±0.439	0.365 ±0.065	0.735 ±0.099 a
ZN	4.466 ±0.140	2.887 ±0.315	11.584 ±2.562 ab	0.556 ±0.126 b	1.332 ±0.309 b	0.706 ±0.431	0.120 ±0.013	0.282 ±0.039 b
FE	4.507 ±0.861	4.477 ±1.401	13.299 ±2.211 ab	1.394 ±0.486 ab	4.387 ±0.990 ab	1.331 ±0.487	0.333 ±0.128	0.598 ±0.199 ab

处理 Treatment	根—茎 Root-stem	茎—茎节 Stem-stem node	茎节—叶 Stem node-leaf	叶—穗轴 Leaf-cob	穗轴—枝梗 Cob-branch	枝梗—稻壳 Brunch-rice husk	稻壳—糙米 Rice husk-brown rice
CK	0.930±0.060	4.792±0.795	0.050±0.002 b	1.595±0.017 a	0.384±0.031 ab	0.120±0.009 a	1.939±0.121
SE	0.863±0.117	3.157±0.435	0.105±0.024 a	0.754±0.172 b	0.162±0.021 b	0.041±0.005 b	2.187±0.168
GWY	0.772±0.046	4.313±0.236	0.064±0.010 ab	1.187±0.131 ab	0.517±0.113 a	0.117±0.028 a	1.988±0.262
SI	0.899±0.017	4.233±0.298	0.090±0.005 ab	0.748±0.167 b	0.236±0.049 ab	0.071±0.006 ab	2.039±0.076
ZN	0.643±0.044	4.065±0.669	0.050±0.010 b	1.119±0.378 ab	0.451±0.148 ab	0.095±0.009 ab	2.378±0.309
FE	0.947±0.101	3.284±0.429	0.099±0.015 ab	0.943±0.015 ab	0.301±0.054 ab	0.075±0.014 ab	1.865±0.079

Effects of foliar control agents on cadmium enrichment characteristics of rice in karst area in central Guizhou

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处理 Treatment	Zn/(mg·kg^-1)	Fe/(mg·kg^-1)	Si/(g·kg^-1)
CK	22.300±0.478 ab	11.687±0.210 a	2.685±0.087 b
SE	23.273±0.702 ab	9.220±0.244 cd	3.036±0.059 ab
GWY	23.670±0.881 ab	9.973±0.250 bc	3.129±0.175 a
SI	19.587±0.745 b	8.703±0.175 d	2.699±0.101 b
ZN	23.337±1.811 ab	8.827±0.154 d	2.987±0.040 ab
FE	25.893±0.904 a	10.600±0.352 b	2.854±0.063 ab

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