Green Chelator Complexes: Effects on Phytoremediation of Cd and As Contaminated Soil in the Intercropping System

doi:10.11924/j.issn.1000-6850.casb20190900602

Abstract

Abstract:

The authors compared the concentrations of Cd and As of Sedum plumbizincicola under the condition of singlecropping and intercropping, and analyzed the effects of applying different green chelator complexes on the growth of Pisum sativum L. and the enrichment capacity to Cd and As. The results showed that: without applying green chelators, the absorption of Cd and As in the aboveground of Sedum plumbizincicola after intercropping with Pisum sativum L. increased significantly; IDS-TA and PASP-TA increased the concentration of Cd 6.60 and 2.93 times, and increased the concentration of As 2.34 and 1.27 times in the shoots of Sedum plumbizincicola, respectively; IDS-TA decreased the concentration of Cd and As in Pisum sativum L; all green chelator complexes increased available Cd and As except IDS-MA, and the increase rate of available Cd and As of soil treated by IDS-TA were the highest. The results suggest that IDS-TA can enhance phytoremediation of Cd and As contaminated soil without having a negative impact on the growth and security of Pisum sativum L., which can provide a theoretical basis for activator of phytoremediation of Cd and As contaminated vegetable field in the Pearl River Delta.

Key words: Cd, As, green chelator, complexes, Sedum plumbizincicola, Pisum sativum L.

CLC Number:

Fan Jianfen, Tian Haoqi, Zhu Yu’en, Wang Xinrui, Qi Hao, Wang Jiyu, Li Hua. Green Chelator Complexes: Effects on Phytoremediation of Cd and As Contaminated Soil in the Intercropping System[J]. Chinese Agricultural Science Bulletin, 2020, 36(17): 76-83.

Figures/Tables 10

References 30

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处理		Cd	As
伴矿景天	单作	5.360±0.102	0.551±0.051
伴矿景天	间作	6.278±0.158^*	0.590±0.030
豌豆	单作	0.030±0.007	—
豌豆	间作	0.028±0.001	—

处理		Cd	As
伴矿景天	单作	5.360±0.102	0.551±0.051
伴矿景天	间作	6.278±0.158^*	0.590±0.030
豌豆	单作	0.030±0.007	—
豌豆	间作	0.028±0.001	—

植物	重金属	处理	回归方程	皮尔逊相关系数R	双尾显著性检验P值
伴矿景天地上部分	Cd	IDS-OA	y=336.150x-3.694	0.822	0.386
		IDS-TA	y=38.372x+45.879	0.074	0.953
		IDS-MA	y=319.070x+0.917	0.405	0.735
		PASP-OA	y=36.508x+8.106	0.177	0.887
		PASP-TA	y=604.830x+3.468	0.997	0.051
		PASP-MA	y=333.104x-4.744	0.682	0.523
	As	IDS-OA	y=-0.856x+5.993	-0.986	0.108
		IDS-TA	y=0.376x-1.004	0.500	0.666
		IDS-MA	y=-0.158x+3.097	-0.590	0.598
		PASP-OA	y=0.195x+0.127	0.977	0.138
		PASP-TA	y=0.706x-2.262	0.886	0.307
		PASP-MA	y=0.880x-3.519	0.808	0.401
豌豆地上部分	Cd	IDS-OA	y=1.785x+0.028	0.907	0.277
		IDS-TA	y=0.037x+0.034	0.034	0.979
		IDS-MA	y=-0.268x+0.055	-0.184	0.882
		PASP-OA	y=0.044x+0.055	0.052	0.967
		PASP-TA	y=-1.342x+0.088	-0.980	0.127
		PASP-MA	y=-0.369x+0.055	-0.558	0.623
	As	IDS-OA	y=0.349x-1.987	0.660	0.541
		IDS-TA	y=-0.056x+0.650	-0.976	0.140
		IDS-MA	y=-0.011x+0.698	-0.084	0.946
		PASP-OA	y=-0.030x+0.206	-0.975	0.142
		PASP-TA	y=0.149x-0.299	0.471	0.688
		PASP-MA	y=0.062x+0.121	0.935	0.232

植物	重金属	处理	回归方程	皮尔逊相关系数R	双尾显著性检验P值
伴矿景天地上部分	Cd	IDS-OA	y=336.150x-3.694	0.822	0.386
		IDS-TA	y=38.372x+45.879	0.074	0.953
		IDS-MA	y=319.070x+0.917	0.405	0.735
		PASP-OA	y=36.508x+8.106	0.177	0.887
		PASP-TA	y=604.830x+3.468	0.997	0.051
		PASP-MA	y=333.104x-4.744	0.682	0.523
	As	IDS-OA	y=-0.856x+5.993	-0.986	0.108
		IDS-TA	y=0.376x-1.004	0.500	0.666
		IDS-MA	y=-0.158x+3.097	-0.590	0.598
		PASP-OA	y=0.195x+0.127	0.977	0.138
		PASP-TA	y=0.706x-2.262	0.886	0.307
		PASP-MA	y=0.880x-3.519	0.808	0.401
豌豆地上部分	Cd	IDS-OA	y=1.785x+0.028	0.907	0.277
		IDS-TA	y=0.037x+0.034	0.034	0.979
		IDS-MA	y=-0.268x+0.055	-0.184	0.882
		PASP-OA	y=0.044x+0.055	0.052	0.967
		PASP-TA	y=-1.342x+0.088	-0.980	0.127
		PASP-MA	y=-0.369x+0.055	-0.558	0.623
	As	IDS-OA	y=0.349x-1.987	0.660	0.541
		IDS-TA	y=-0.056x+0.650	-0.976	0.140
		IDS-MA	y=-0.011x+0.698	-0.084	0.946
		PASP-OA	y=-0.030x+0.206	-0.975	0.142
		PASP-TA	y=0.149x-0.299	0.471	0.688
		PASP-MA	y=0.062x+0.121	0.935	0.232

植物	重金属	处理	回归方程	皮尔逊相关系数R	双尾显著性检验P值
伴矿景天地上部分	Cd	IDS-OA	y=3.840x-0.527	0.986	0.108
		IDS-TA	y=1.884x+5.823	0.997^*	0.049
		IDS-MA	y=33.570x-0.843	0.868	0.331
		PASP-OA	y=6.737x-0.447	0.969	0.159
		PASP-TA	y=10.320x+1.574	0.825	0.382
		PASP-MA	y=3.335x-0.454	0.997	0.050
	As	IDS-OA	y=0.797x-0.738	0.965	0.169
		IDS-TA	y=0.812x+0.412	0.902	0.284
		IDS-MA	y=0.261x+2.505	0.342	0.778
		PASP-OA	y=0.670x+0.026	0.870	0.328
		PASP-TA	y=0.445x+0.578	0.886	0.307
		PASP-MA	y=10.065x-11.802	0.999^*	0.020
豌豆地上部分	Cd	IDS-OA	y=2.300x+0.301	0.999	0.021
		IDS-TA	y=-0.499x-0.075	-0.983	0.117
		IDS-MA	y=-5.831x+0.192	-0.777	0.433
		PASP-OA	y=3.512x-0.362	0.992	0.079
		PASP-TA	y=-3.055x+0.223	-0.866	0.334
		PASP-MA	y=-0.540x-0.066	-0.978	0.133
	As	IDS-OA	y=-0.795x+0.488	-0.915	0.264
		IDS-TA	y=-0.082x-0.203	-0.407	0.733
		IDS-MA	y=0.595x+0.127	0.954	0.194
		PASP-OA	y=-0.180x-0.612	-0.873	0.324
		PASP-TA	y=0.341x-0.188	0.993	0.074
		PASP-MA	y=1.027x-1.007	0.973	0.149