Nutrient Management and Optimized Fertilization on Wheat and Maize in Henan Province

The project has been focusing on Nutrient Expert based fertilizer recommendation since 2010


21 Mar 2014

2013 Annual Interpretive Summary

This study was conducted to validate Nutrient Expert® (NE)-based fertilizer recommendation for winter wheat and summer maize in farmer fields and compare them with farmer fertilizer practice (FFP). For this project, nine on-farm wheat and three on-farm maize experiments were conducted in Hebi and Zhengzhou, in Henan Province. The NE-based fertilizer recommendation plots received on average 174-92-78 kg N-P2O5-K2O/ha for wheat and 182-79-90 N-P2O5-K2O/ha for maize, respectively, while FFP plots received 161-112-90 N-P2O5-K2O/ha for wheat and 249-48-42 N-P2O5-K2O/ha for maize.

Results from the study in 2013 showed that grain yields in NE plots were 7.5 t/ha and 10.6 t/ha for wheat and maize, respectively; while respective profits were US$2,894/ha and US$3,346. In FFP plots, the corresponding values were 7.4 and 10.6 t/ha and profits were US$2,846 and $US3,389/ha. However, higher agronomic efficiency of N (8.5 kg/kg for wheat and 9.4 kg/kg for maize), N recovery efficiency (32% for wheat and 41% for maize) and partial factor productivity of N (43.7 kg/kg for wheat and 58.5 kg/kg for maize) were obtained using NE-based fertilizer recommendations compared to FFP, where the corresponding values were 8.1 and 6.7 kg/kg, 26.4 and 24.7%, and 46.3 and 42.5 kg/kg for wheat and maize, respectively.