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当前位置: 首页 > 文章 > 氮肥形态和螯合剂对印度芥菜和高积累镉油菜吸收镉的影响 农业环境科学学报 2004,23 (04) 2-6
Position: Home > Articles > Effects of Nitrogenous Fertilizers and Chelators on Absorption of Cadmium by Indian Mustard and Oilseed Rape Journal of Agro-Environment Science 2004,23 (04) 2-6

氮肥形态和螯合剂对印度芥菜和高积累镉油菜吸收镉的影响

作  者：
王激清;茹淑华;苏德纯
单  位：
中国农业大学植物营养系农业部植物营养学重点实验室教育部植物-土壤相互作用重点实验室
关键词：
Cd;印度芥菜;油菜;植物修复;螯合剂
摘  要：
用Cd污染的土壤做盆栽试验,研究了氮肥形态和螯合剂对印度芥菜和高积累Cd油菜吸收Cd的影响。结果表明,生长后期浇入EDTA可增加植株地上部的吸Cd量和对土壤的净化率,而浇入柠檬酸的作用相反。在施氮量相同的条件下,施用不同形态氮肥对印度芥菜和油菜川油Ⅱ-10地上部和根吸Cd量有显著影响,施用硫酸铵的处理印度芥菜和高积累Cd油菜吸Cd量高于施用硝酸铵和硝酸钙的处理。
译  名：
Effects of Nitrogenous Fertilizers and Chelators on Absorption of Cadmium by Indian Mustard and Oilseed Rape
作  者：
WANG Ji-qing1,2 ,RU Shu-hua1 ,SU De-chun1(1.Key Laboratory of Plant Nutrition,MOA,Key Laboratory of Plant-Soil Inte ractions,MOE,Department of Plant Nutrition,CAU,Beijing 100094,China;2.Hebe i North University,Zhangjiakou 075131,China)
关键词：
cadmium;Indian mustard;oilseed rape;phytoremediation
摘  要：
The aim of the present study was to select Cd accumulating oilseed r ape varieties for phytoremediation of Cd contaminated soil and to investigate th e uptake and accumulation mechanism for the selected oilseed rapes, finally impr oved oilseed rapes remediation ability.Greenhouse pot trails using Cd contaminat ed soil indicated that the variety ChuanyouⅡ-10 was a potential cultivar for p hytoremediation of Cd contaminated soil. Effects of nitrogenous fertilizers and chelators on absorption of cadmium by Indian mustard and oilseed rape were also studied with greenhouse pot cultivation experiment. The results indicate that wh en citric acid and EDTA was added to Cd contaminated soil in the later growth pe riod, shoot and root dry weight yield of Indian mustard and oilseed rape under E DTA treatment had more significant decrease than that under citric acid treatmen t, Both EDTA and citric acid could activate the Cd in the Cd contaminated soil, but Indian mustard and oilseed rape under EDTA treatment might absorb more Cd in the Cd contaminated soil and transport Cd from root to shoot; on the contrary, citric acid could activate less Cd in the Cd contaminated soil, so Indian mustar d and oilseed rape root could absorb less Cd, at the same time transport less Cd from root to shoot. Similarly, when citric acid and EDTA was added to Cd contam inated soil in the later growth period, Cd uptake and shoot removal rate of Indi an mustard and ChuanyouⅡ-10 could markedly increase while the addition of citr ic acid showed an opposite trend. Shoot and root dry weight yield MG SRC="IMAGE/09250001.JPG" HEIGHT=15 WIDTH =24>of Indian mustard and oilseed rape in different nitrogenous treatment had no significant difference. Rhizosphere is a microbiosphere and has quite different chemical, physical and biological properties from bulk soils. On the one hand, when-N nitrogenous fertilizer was added, rhizosphere pH decreased. On the othe r hand, when-N nitrogenous fertilizer was added, rhizosphere pH increased. The availability of heavy metals and nutrients are affected by soil pH, changes in rhizosphere pH were associated with the relative uptake of cations and anions. S o the addition of different nitrogenous fertilizer could increase the shoot and root uptake of Cd for both Indian mustard and ChuanyouⅡ-10 with the following descending trend of uptake capability: (NH4)2SO4> NH4NO3> Ca(NO3)2. On the whole , selection, accumulation characteristics, regulation measure and their potentia l for phytoremediation of cadmium contaminated soil of Indian mustard and oilsee d rape were investigated.

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