HU Liping,ZHOU Guoxing,LI Chong,et al.Effect of a Complex Amendment on the Quality of Pak Choi Under Cd Contamination Stress[J].Northern Horticulture,2015,39(18):35-40.[doi:10.11937/bfyy.201518009]
复合改良剂对镉污染土壤中小白菜品质的影响
- Title:
- Effect of a Complex Amendment on the Quality of Pak Choi Under Cd Contamination Stress
- 文献标志码:
- A
- 摘要:
- 以复合改良剂为试材，以小白菜为研究对象，采用盆栽试验方法，种植在人工配置的不同程度镉污染土壤中（2、4、25、50、100 mg/kg），研究不同浓度复合改良剂（0、600、900、1 200 mg/kg）对土壤有机质、pH值、小白菜可食部位镉含量和营养品质的影响。结果表明：施用900 mg/kg复合改良剂可使镉污染土壤有机质含量提高12.36%～72.24%，但对土壤pH值无显著影响。施用复合改良剂可明显提高小白菜安全性和营养品质，5个镉处理小白菜可食部位镉含量降低32.04%～44.87%，维生素C含量增加10.73%～48.62%，可溶性糖含量提高10.37%～59.52%，粗纤维含量降低11.53%～28.10%。因此，复合改良剂能够用于重金属污染土壤的原位修复，推荐其适宜用量为900 mg/kg。
- Abstract:
- Pot experiments were carried out to investigate the effect of a complex amendment on the soil organic matter content，pH，Cd uptake and nutritional quality of pak choi (Brassica rapa L.Chinensis Group.) planted in five levels (2，4，25，50，100 mg/kg) of Cd contaminated soil in which different concentrations of amendments (0，600，900，1 200 mg/kg) were added.The results showed that when applying 900 mg/kg amendment，the soil organic matter content increased from 12.36% to 72.24%.However，applying the amendment had no significant effect on the pH of soil.The security and nutritional quality of pak choi were obviously improved comparing with no amendment application.The Cd and crude fiber content of pak choi decreased from 32.04% to 44.87% and from 11.53% to 28.10%，respectively.Furthermore，the contents of vitamin C and soluble sugar of pak choi increased from 10.73% to 48.62% and from 10.37% to 59.52%，respectively.These datas indicated that the complex amendment could be used in the in-situ repair of heavy metal contaminated soil，and the recommended dosage was 900 mg/kg.
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备注/Memo
第一作者简介：胡丽萍（1981-），女，博士，助理研究员，研究方向为蔬菜营养品质。E-mail:huliping@nercv.org.责任作者：何洪巨（1966-），男，博士，研究员，研究方向为蔬菜营养品质。E-mail:hehongju@nercv.org.基金项目：北京市农委资助项目（20120129）；北京市叶类蔬菜创新团队资助项目（blvt18）。