Effect of Conditioners on the Distribution and Migration of Cadmium in Drip Irrigation Cotton Field

AN Mengjie; WANG Kaiyong; WANG Haijiang; E Yulian; MA Hongxiu; HONG Dashuang

doi:10.13870/j.cnki.stbcxb.2018.04.046

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Effect of Conditioners on the Distribution and Migration of Cadmium in Drip Irrigation Cotton Field

更新时间：2025-03-12

- Effect of Conditioners on the Distribution and Migration of Cadmium in Drip Irrigation Cotton Field
- Vol. 32, Issue 4, Pages: 291-296(2018)
- 作者机构：
  
  石河子大学农学院,新疆,石河子,832000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2018.04.046
  CLC：
- Published：2018
- 稿件说明：
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AN Mengjie, WANG Kaiyong, WANG Haijiang, et al. Effect of Conditioners on the Distribution and Migration of Cadmium in Drip Irrigation Cotton Field[J]. 2018, 32(4): 291-296.
DOI：

AN Mengjie, WANG Kaiyong, WANG Haijiang, et al. Effect of Conditioners on the Distribution and Migration of Cadmium in Drip Irrigation Cotton Field[J]. 2018, 32(4): 291-296. DOI： 10.13870/j.cnki.stbcxb.2018.04.046.

摘要

通过田间桶栽试验研究了高浓度镉（40 mg/kg）条件下，4种改良剂（有机—无机复合稳定剂、无机高分子复配材料、聚丙烯酸盐复配材料、有机高分子复配材料）对棉田土壤剖面中土壤pH、阳离子交换量（CEC）、镉含量及其形态分布迁移的影响。结果表明：（1）4种改良剂均显著提高了棉田土壤剖面各层的pH和CEC，无机高分子复配材料在0—20 cm土层效果最好，分别增加了0.43个单位和4.43 cmol/kg；（2）改良剂促进土壤可交换态镉向其余4种形态的转化，相关分析表明碳酸盐结合态与可交换态镉含量呈极显著负相关（P<0.01），在0—20 cm和20—40 cm土层中效果尤为突出，以无机高分子复配材料对土壤可交换态镉的降低效果最好，降低了3.61 mg/kg；（3）各土层中的pH和CEC均与可交换态镉呈负相关，与其他形态呈正相关。即改良剂通过改变土壤pH和CEC，影响土壤镉的分布及迁移，从而降低镉的有效性，达到改善土壤环境的目的。

Abstract

Tub experiment was carried out to investigate the influence of conditioners on the soil pH

cation exchange capacity (CEC)

the distribution and migration of soil Cd concentration

and soil Cd fraction when exposed to high Cd pollution (40 mg/kg). Four conditioners were organic-inorganic composite conditioner

inorganic polymer compound conditioner

polyacrylate compound conditioner

and organic polymer compound conditioner. The results showed that:(1) Four conditioners increased the soil pH and CEC

and the inorganic polymer compound conditioner worked the best in the 0-20 cm soil layer

increased by 0.43 units and 4.43 cmol/kg respectively. (2) The use of four conditioners improve the transformation of exchangeable Cd to other forms. Correlation analysis showed that there was a significant negative correlation between carbonate and exchangeable Cd (P<0.01)

and showed particularly prominent effect at 0-20 cm and 20-40 cm soil layer. The use of inorganic polymer compound conditioner showed the best reduction of the soil exchangeable Cd

reduced 3.61 mg/kg. (3) Soil pH and CEC were negatively correlated with the concentration of soil exchangeable Cd in all soil layers and positively correlated with other forms. That is

the conditioners affect the soil cadmium distribution and migration by changing the soil pH and soil CEC

thereby reducing the effectiveness of cadmium

and improving the soil environment.

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