Study on Effects of Soil Passivation Materials and Leaf Surface Control on Remediation of Cadmium Contaminated Farmland

doi:10.11924/j.issn.1000-6850.casb2023-0883

Abstract

Abstract:

To explore the effects of different passivation materials with foliar inhibitor technology on the remediation of cadmium polluted farmland, screening the targeted remediation materials, this study selected a typical moderate and mild cadmium polluted farmland for demonstration, and adopted two different passivation materials with foliar inhibitor technology to study the effects on soil pH, available Cd and Cd content in various parts of rice. The results showed that compared with the control (CK), the pH of different treatments all increased to a certain extent (0.5%-12.5%). In SF1 and SF2, the available Cd content decreased by 23.4%-36.7% and 15.1%-30.8%, respectively; the Cd content in rice roots decreased by 70.5%-79.4% and 65.2%-72.6%, respectively; the Cd content in stems and leaves decreased by 36.7%-50.0% and 18.8%-38.4%, respectively; the Cd content in brown rice decreased by 60.1%-74.4% and 47.4%-72.2%, respectively; it could be seen that both passivation materials could effectively reduce the content of available Cd in soil, affected the enrichment of Cd in various parts of rice, and the foliar inhibitor could further inhibit the transport of Cd in rice plants, reducing the accumulation of Cd in rice deeply.

Key words: soil passivation, farmland restoration, cadmium pollution, rice, enrichment, transport, foliar immobilization technique, soil pH value, available cadmium, cadmium content in rice

CHANG Haiwei, GUI Juan, FU Yuncong. Study on Effects of Soil Passivation Materials and Leaf Surface Control on Remediation of Cadmium Contaminated Farmland[J]. Chinese Agricultural Science Bulletin, 2024, 40(16): 112-117.

Figures/Tables 7

References 25

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材料	主要成分	用量	作物
JD1	海泡石、MgO、CaO、SiO₂等	3000 kg/hm²	水稻
JD2	铝基材料、铁盐、TMT等	2250 kg/hm²	水稻
ZK	有机硅、有机质	3000 mL/hm²	水稻

材料	主要成分	用量	作物
JD1	海泡石、MgO、CaO、SiO₂等	3000 kg/hm²	水稻
JD2	铝基材料、铁盐、TMT等	2250 kg/hm²	水稻
ZK	有机硅、有机质	3000 mL/hm²	水稻

处理		富集系数(BCF)			转运系数(TF)
处理		根部	地上部	糙米	根—茎叶	茎叶—糙米
SF1	CK	3.94±0.55a	1.05±0.26a	0.47±0.07a	0.15±0.05a	0.87±0.20a
	JD1	1.13±0.16b	0.52±0.11b	0.23±0.02b	0.26±0.15a	0.91±0.40a
	JD2	0.94±0.12b	0.52±0.08b	0.19±0.02bc	0.35±0.14a	0.66±0.27a
	JD1+ZK	1.16±0.24b	0.54±0.12b	0.20±0.02bc	0.30±0.18a	0.69±0.25a
	JD2+ZK	0.81±0.09b	0.51±0.13b	0.15±0.03c	0.46±0.19a	0.42±0.08a
SF2	CK	4.67±0.73a	1.50±0.04a	0.69±0.07a	0.27±0.03a	0.87±0.21a
	JD1	1.28±0.21b	0.85±0.11b	0.35±0.03b	0.40±0.14a	0.75±0.22ab
	JD2	1.63±0.20b	1.02±0.16b	0.42±0.03bc	0.37±0.10a	0.74±0.13ab
	JD1+ZK	1.35±0.07b	0.77±0.12b	0.22±0.03d	0.40±0.07a	0.43±0.12b
	JD2+ZK	1.41±0.33b	0.98±0.18b	0.33±0.01c	0.49±0.18a	0.53±0.15ab

处理		富集系数(BCF)			转运系数(TF)
处理		根部	地上部	糙米	根—茎叶	茎叶—糙米
SF1	CK	3.94±0.55a	1.05±0.26a	0.47±0.07a	0.15±0.05a	0.87±0.20a
	JD1	1.13±0.16b	0.52±0.11b	0.23±0.02b	0.26±0.15a	0.91±0.40a
	JD2	0.94±0.12b	0.52±0.08b	0.19±0.02bc	0.35±0.14a	0.66±0.27a
	JD1+ZK	1.16±0.24b	0.54±0.12b	0.20±0.02bc	0.30±0.18a	0.69±0.25a
	JD2+ZK	0.81±0.09b	0.51±0.13b	0.15±0.03c	0.46±0.19a	0.42±0.08a
SF2	CK	4.67±0.73a	1.50±0.04a	0.69±0.07a	0.27±0.03a	0.87±0.21a
	JD1	1.28±0.21b	0.85±0.11b	0.35±0.03b	0.40±0.14a	0.75±0.22ab
	JD2	1.63±0.20b	1.02±0.16b	0.42±0.03bc	0.37±0.10a	0.74±0.13ab
	JD1+ZK	1.35±0.07b	0.77±0.12b	0.22±0.03d	0.40±0.07a	0.43±0.12b
	JD2+ZK	1.41±0.33b	0.98±0.18b	0.33±0.01c	0.49±0.18a	0.53±0.15ab

处理	CK	JD1	JD2	JD1+ZK	JD2+ZK
SF1	510.97±8.96a	501.4±4.42a	505.2±13.54a	515.80±18.95a	521.87±20.40a
SF2	502.4±9.66a	495.7±5.30a	499.37±14.65a	512.10±7.26a	517.43±10.04a