[Ammonia volatilization and nitrogen use efficiency in the field of fresh edible maize as affec-ted by different band fertilization depths of controlled-release urea].

A field experiment was conducted to examine the effects of controlled-release urea (CRU) application on ammonia (NH) volatilization, nitrogen (N) use efficiency and fresh ear yield of fresh edible maize. The treatments included one control (CK: no N fertilizer application) and four different band fertilization depths (0, 5, 10, 15 and 20 cm). Results showed that NH volatilization from non-fertilization band and planting band mainly occurred in the first two weeks after the fertilization, which lasted for almost a month in the fertilization band.