Crops ›› 2019, Vol. 35 ›› Issue (6): 50-56.doi: 10.16035/j.issn.1001-7283.2019.06.008

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Research on the Absorption of Heavy Metals by Different Genotypes in Sweet Sorghum

Tang Taoxia,Wang Zhihe,Shi Zhiguo,Chang Ying,Zhang Yingying,Li Yanrong   

  1. Gansu Academy of Agri-Engineering Technology, Wuwei 733006, Gansu, China
  • Received:2019-06-03 Revised:2019-10-18 Online:2019-12-15 Published:2019-12-11
  • Contact: Yanrong Li

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Abstract:

In order to precisely figure out the regular absorption pattern of sweet sorghum to multiple heavy metals, and to select the ideal soil phytoremediation varieties, the research was conducted in the fields containing different concentrations of Cu, Cd, Pb, As, Hg with six different genotypes as the test materials, which aimed to analyze the biological traits, heavy metals content distribution, enrichment capacity and transfer capacity. The results showed that: The sugar rate of alcohol-type varieties was significantly higher than that of forage-type varieties; the dry matter quality of Daka was the largest, followed by Ketian 1 and Dajiang 1180; Cd, Pb and As were mainly distributed in the roots of sweet sorghum, which was not easy being transferred, while Hg was easily transported, mainly distributed in the leaves, and the distribution of Cu varies in different varieties. Ketian 1 possessed the strongest accumulation ability for Cu and Hg, and Ketian 2 possessed the strongest accumulation ability for Pb and As, The Dajiang 1180 possessed the strongest accumulation ability for Cd and the strongest average accumulation ability for 5 heavy metals.

Key words: Sweet sorghum, Heavy metals, Absorption, Enrichment

Table 1

The content of heavy metal in the experimental areas were compared with the heavy metal content in Gansu Province soil mg/kg"

重金属Heavy metal Cr Ni Cu Cd Pb As Hg
甘肃省土壤
Soil of Gansu Province		 60.23 31.65 22.48 0.087 20.53 10.82 0.017
试验区Test point 80.59 37.04 31.55 0.201 23.33 16.44 0.049

Table 2

Biological traits of different genotypes of sweet sorghum"

品种
Variety		 株高(cm)
Plant height		 主茎粗(mm)
Main stem thick		 节间数
Number of internode		 分蘖系数
Tiller coefficient		 糖锤度(%)
Sugar hammer		 干重(g/株) Dry weight (g/plant)
根Root 茎Stem 叶Leaf
科甜2号Ketian 2 360.00a 18.59b 12.22a 2.31b 15.63b 30.41a 159.87a 63.64a
大奖2180 Dajiang 2180 344.70ab 15.16c 11.33ab 3.10a 14.03c 34.58a 172.47a 81.40a
科甜1号Ketian 1 287.20c 21.13b 9.78c 2.25b 20.43a 36.64a 185.68a 89.05a
BJ0603 345.70ab 15.14c 10.67bc 3.04a 12.10d 33.87a 173.15a 74.79a
大奖1180 Dajiang 1180 380.70a 26.20a 12.11a 2.19b 8.73e 30.00a 173.70a 107.58a
大卡Daka 313.00bc 19.73b 11.67a 2.06b 7.90e 36.58a 197.52a 106.97a

Fig.1

Comparison of heavy metals content in different genotypes of sweet sorghum"

Fig.2

Comparison of heavy metals absorption in different genotypes of sweet sorghum"

Table 3

Enrichment coefficients of heavy metals in different genotypes of sweet sorghum"

重金属
Heavy metal		 部位
Part		 品种 Variety 均值
Average		 单株总富集系数
Total enrichment
coefficients per plant
科甜2号
Ketian 2		 大奖2180
Dajiang 2180		 科甜1号
Ketian 1		 BJ0603 大奖1180
Dajiang 1180		 大卡
Daka
Cu 根Root 0.28 0.26 0.32 0.29 0.34 0.30 0.30±0.03 0.75
茎 Stem 0.16 0.12 0.21 0.17 0.14 0.17 0.16±0.03
叶Leaf 0.30 0.26 0.29 0.30 0.31 0.31 0.29±0.02
Cd 根Root 0.65 0.72 0.65 0.69 0.94 0.81 0.74±0.11 1.61
茎 Stem 0.33 0.40 0.48 0.40 0.78 0.61 0.50±0.17
叶Leaf 0.34 0.39 0.42 0.40 0.28 0.40 0.37±0.05
Pb 根Root 0.08 0.07 0.08 0.06 0.07 0.08 0.07±0.01 0.12
茎 Stem 0.01 0.01 0.01 0.01 0.01 0.01 0.01±0.00
叶Leaf 0.05 0.04 0.04 0.06 0.04 0.04 0.04±0.01
As 根Root 0.09 0.07 0.10 0.07 0.08 0.09 0.08±0.01 0.11
茎 Stem 0.01 0.01 0.01 0.01 0.01 0.01 0.01±0.00
叶Leaf 0.03 0.02 0.02 0.02 0.02 0.02 0.02±0.00
Hg 根Root 0.21 0.17 0.22 0.16 0.18 0.18 0.19±0.02 0.59
茎 Stem 0.11 0.08 0.12 0.11 0.10 0.11 0.11±0.01
叶Leaf 0.30 0.31 0.33 0.27 0.25 0.29 0.29±0.03
均值Average 0.20±0.17 0.19±0.20 0.22±0.19 0.20±0.19 0.24±0.28 0.23±0.23 -

Table 4

Transfer coefficients of heavy metals in different genotypes of sweet sorghum"

品种Variety Cu Cd Pb As Hg 均值Average
科甜2号Ketian 2 1.64 1.03 0.79 0.37 1.93 1.15±0.63
大奖2180 Dajiang 2180 1.45 1.08 0.81 0.40 2.34 1.22±0.74
科甜1号Ketian 1 1.54 1.38 0.64 0.29 2.08 1.19±0.72
BJ0603 1.62 1.16 1.10 0.40 2.35 1.33±0.72
大奖1180 Dajiang 1180 1.41 1.13 0.72 0.34 1.90 1.10±0.60
大卡Daka 1.56 1.25 0.60 0.33 2.23 1.19±0.76
均值Average 1.54±0.09 1.17±0.13 0.78±0.18 0.36±0.04 2.14±0.20 -
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