Hexavalent chromium effects on soybeans growth, nitrogen fixation and nutrients absorption

Ciência Rural

Castilhos, Danilo Dufech³  Passianoto, Caio César¹  Lima, Ana Claudia Rodrigues de²  Costa, Claudia das Neves²  Muller, Valberto²  Lima, Claudia Liane Rodrigues de² 

[1] UFPel;Universidade Federal de Pelotas

关键词: /font> Hexavalent chromium;    soy bean;    Bradyrhizobium japonicum;    Symbiotic nitrogen fixation;   

DOI  :  10.1590/S0103-84782001000600008

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

This study was carried out to evaluate the effect of hexavalent chromium on dry matter production, nutrient uptake and nitrogen fixation in soybeans (Glycine max ) The seeds were inoculated with comercial strains of Bradyrhizobium japonicum (SEMIA 587 and 5019) and the plants were grown in "Leonard Jars" containing washed sand in the upper portion and nutrient solution (without N) in the lower. Five Cr6+ concentrations were used: 0, 5, 10, 20 e 40mg -1 in the nutrient solution. Concentrations of Cr6+ above 5mg -1 decreased plants and nodules dry matter production, number of nodules, nitrogen fixation and P, K, Ca e Mg uptake. Chromium concentrations in soybean tops above 3,4mg kg-1 were considered phytotoxic.

【 授权许可】

CC BY-NC