The yield and quality of wheat affected by foliar nitrogen application

摘要

Wheat (Triticum aestivum L.) needs nitrogen at different stages of growth. The timing and amount of nitrogen applied is very important in nitrogen management. As nitrogen leaching is very hazardous to the environment it must be controlled. Nitrogen has the essential role of increasing the yield and quality of wheat. The experiment had a complete randomized block design with six fertilizer treatments and four replications. The six fertilizer tearments were: Tl = P-K (control), T2 = Tl + split N application (1/3 at sowing, 1/3 at tillering and 1/3 at flowering), T3 = T1+ 1/3 at sowing + foliar application at tillering +1/3 at flowering, T4 = T1+ 1/3 at sowing + 1/3 at tillering + foliar application at flowering, T5 = Tl + 1/3 at sowing + foliar application at tillering + 1/3 and foliar application at flowering, T6 = Tl + 1/3 at sowing + 1/3 and foliar application at tillering and also at flowering. The results showed that the grain yield was high in all nitrogen treatments compared with control. Thehighest grain yield (4844 kg/ha) was with the T6 treatment, in which 2/3 of the nitrogen was split at sowing and tillering and foliar application was used at tillering and flowering. Also, the highest grain protein concentration (GPC) (13.58%) was from the T5 treatment and there was a significant difference compared with control. The nitrogen use efficiency (NUE) was higher (45.75%) in the T6 treatment than with the other treatments.