Abstract:

In order to study the translation process of pyrazole nitrification inhibitors in different forms applied in soil, based on the determination of ultraviolet absorption spectra of 3-methylpyrazole (MP) and it derivations, the authro studied the hydrolyzation of 1-carboxamide-3-methylpyrazole (CMP), 1-hydroxymethyl-3-methylpyrazole (HMP) and 3-methylpyrazole phosphate (MPP) in soil, respectively. The results showed that three nitrification inhibitors CMP, HMP and MPP, would hydrolyzed to MP when applied to soil. The neutralization and introduction of carboxamide or hydroxymethyl would unchanged the effect of MP, but only changed the form and physical characteristics. The microorganism and enzyme in soil which catalyzed hydrolyzation of C—N might increase the hydrolyzation.