Effect of six triorganotin(IV) compounds on nitrification and ammonification in soil

✍ Scribed by A J Kuthubutheen; R Wickneswari; V G Kumar Das

• Publisher: John Wiley and Sons
• Year: 1989
• Tongue: English
• Weight: 898 KB
• Volume: 3
• Category: Article
• ISSN: 0268-2605
• DOI: 10.1002/aoc.590030405

✦ Synopsis

The effects of six triorganotin(1V) compounds and of Thiram on nitrification and ammonification in soil were investigated. Low concentrations of up to 50 pg g-' of the triorganotin(1V) compounds enhanced nitrate-nitrogen (NO, -N) production in soil. Except for diphenylbutyltin bromide, which inhibited nitrification at 250 pg g-', the other triorganotino compounds were inhibitory at concentrations of 100 pg g-' to less than 250 pg g-'.

At 10 pg g-', only triphenyltin acetate was less inhibitory towards nitrification compared with Thiram. At 250 pg g-', Thiram exerted a strongly persistent inhibitory effect towards nitrification.

The NOT-N level recorded 28 days after application was only 0.10 pg g-' soil. With the triorganotin compounds NOT-N levels of 7.05-12.06 pg g-' soil were recorded 28 days following their application. The deleterious effects of the triorganotin(I\r) compounds were less persistent and recovery of nitrification was evident seven days after application. Low concentrations of Thiram and triorganotin(1V) compounds inhibited ammonification, whereas higher concentrations enhanced ammonification. Complete inhibition of ammonification was attained 21-28 days after application of Thiram at 50 pg g-'. On the other hand, with the triorganotin(1V) compounds, except for diphenylbutyltin bromide at 10-50 pg g-', ammonification persisted at all concentrations 28 days after application.