20038
The rhizospheric microbial characteristics were significantly related to the concentrations of Mg , K , Zn , Fe and Cu , suggesting that microbial influence on metal accumulation is specific and selective , not eurytopic .
 Chemical: Mg; Chemical: K; Chemical: Zn; Chemical: Fe; Chemical: Cu
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Mg; Chemical: K; Chemical: Zn; Chemical: Fe; Chemical: Cu