The Safe Utilization Technology of Pb-contaminated Farmland Using Sweet Sorghum

doi:10.11923/j.issn.2095-4050.cjas20190800148

Abstract

Abstract:

To establish the safe utilization technology of Pb-contaminated farmland using sweet sorghum, we studied the Pb-enrichment characteristics of sweet sorghum by a field control experiment and analyzed their correlations with the soil Pb concentrations. The results showed that: sweet sorghum had strong ability to tolerate Pb, without obvious heavy metal toxicity under different Pb concentrations; meanwhile, the water and sugar content of stem had no significant effect under the Pb treatments; the Pb concentrations in the root, stem, leaf and seed of the sweet sorghum increased significantly with the increasing Pb concentrations in soil, and there was a significant linear relationship between them; the Pb concentrations showed an order of root>leaf>stem>grain, and the accumulation of Pb in the sweet sorghum plant reached 12.4 mg/plant in the study. Therefore, the safe utilization technology of Pb-contaminated farmland of sweet sorghum is established by integrating advanced solid-state fermentation technology (ASSF) and combustion technology to realize the safe disposal of sweet sorghum plants. This method is simple and convenient, and can achieve significant economic, social and environmental benefits.

Key words: Pb Contamination, Farmland, Sweet Sorghum, Safe Utilization, Enrichment Characteristics, Sugar Content

CLC Number:

Xue Zhongcai, Du Ruiheng, Li Shizhong. The Safe Utilization Technology of Pb-contaminated Farmland Using Sweet Sorghum[J]. Journal of Agriculture, 2020, 10(7): 50-55.

Figures/Tables 8

References 25

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测定项目	T0	T1	T2	T3	T4	T5
Total Pb	51.03±1.68	470.73±23.93	928.69±37.66	1454.87±52.66	2031.23±19.22	3102.26±321.91
HCl-Pb	0.71±0.25	1.63±0.10	7.37±1.65	14.90±0.76	27.25±1.76	93.18±5.06

测定项目	T0	T1	T2	T3	T4	T5
Total Pb	51.03±1.68	470.73±23.93	928.69±37.66	1454.87±52.66	2031.23±19.22	3102.26±321.91
HCl-Pb	0.71±0.25	1.63±0.10	7.37±1.65	14.90±0.76	27.25±1.76	93.18±5.06

铅处理	株高/cm	根干重/g	茎干重/g	叶干重/g	籽粒干重/g
T0	263.50±4.20a	17.21±2.80a	112.48±14.53a	57.50±1.99a	12.07±1.49a
T1	256.60±17.25a	18.44±1.68a	100.27±20.49a	57.88±2.93a	12.96±2.24a
T2	261.67±20.79a	17.66±1.62a	106.64±9.05a	57.80±3.09a	11.37±1.73a
T3	264.00±21.83a	18.84±12.04a	98.54±6.72a	59.46±7.09a	10.90±1.39a
T4	263.40±10.21a	12.89±1.12b	98.13±16.31a	46.12±5.89a	10.38±1.14a
T5	276.20±19.99a	12.13±4.39b	111.03±18.22a	55.57±12.33a	9.22±0.56b

铅处理	株高/cm	根干重/g	茎干重/g	叶干重/g	籽粒干重/g
T0	263.50±4.20a	17.21±2.80a	112.48±14.53a	57.50±1.99a	12.07±1.49a
T1	256.60±17.25a	18.44±1.68a	100.27±20.49a	57.88±2.93a	12.96±2.24a
T2	261.67±20.79a	17.66±1.62a	106.64±9.05a	57.80±3.09a	11.37±1.73a
T3	264.00±21.83a	18.84±12.04a	98.54±6.72a	59.46±7.09a	10.90±1.39a
T4	263.40±10.21a	12.89±1.12b	98.13±16.31a	46.12±5.89a	10.38±1.14a
T5	276.20±19.99a	12.13±4.39b	111.03±18.22a	55.57±12.33a	9.22±0.56b

铅处理	根	茎	叶	籽粒
T0	20.93±2.39e	2.27±1.34d	22.13±3.11e	1.94±0.12e
T1	22.42±0.13e	2.30±0.16d	19.80±4.55e	2.62±0.84e
T2	47.18±16.72d	6.10±0.19c	41.00±0.45d	3.69±0.68d
T3	91.77±7.51c	10.64±4.51b	50.92±2.92c	4.44±1.19c
T4	77.07±2.05b	14.05±2.84b	74.78±8.21b	5.30±0.42b
T5	311.04±4.24a	19.51±3.59a	114.37±5.89a	11.28±0.62a