Use of urease inhibitors to reduce ammonia loss from broadcast urea and increase grain yield of flooded rice in Thailand

概要

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In Thailand a series of field experiments were run over three years from 1991 to 1993, testing the effects of urease inhibitors on ammonia loss from urea broadcast to flooded rice as well as on grain yield. The results showed that amendment with the algicide terbutryn and the urease inhibitors PPD and NBPT, either alone or in combination significantly reduced NH_3 loss and increased grain yield. Experiments with the algicide in combination with the urease inhibitors NBPTO and CHPT demonstrated their effective action in reducing NH_3 loss. When used alone urease inhibitors had no effect on grain yield, on the uptake of applied ^<15>N by the grain nor on the uptake of ^<15>N by the whole plant unless an algicide or algicide + nitrification inhibitor was added.
一般社団法人日本土壌肥料学会の論文