Improvement of early seedling growth of dry direct-seeded rice by urease inhibitors application.

Poor crop establishment associated with urea-induced ammonia volatilization inhibits the optimum plant growth of dry direct-seeded rice. The objective of this study was to examine the reduction of soil ammonia volatilization by urease inhibitors when urea is applied at seeding and to identify the sensitivity of shoot and root growth of dry direct-seeded rice to ammonia volatilization. Two Petri-dish incubation experiments were conducted using...