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


25 Jan 2013

2012 Annual Interpretive Summary

Nutrient Expert®-based Fertilizer Recommendations for Winter Wheat and Summer Maize in Henan, 2012
This study was conducted to validate Nutrient Expert® (NE)-based fertilizer recommendations for winter wheat and summer maize in farmer fields and compare them with farmer fertilizer practice (FFP). For this, 20 on-farm wheat and 17 on-farm maize experiments were conducted in Hebi and Zhengzhou, Henan province. NE-based fertilizer recommendation plots received on average 183-97-90 kg N-P2O5-K2O/ha for wheat and 178-71-80 kg N-P2O5-K2O/ha for maize; while farmer fertilizer practice (FFP) plots received an average of 198-118-89 kg N-P2O5-K2O/ha for wheat and 175-95-95 kg N-P2O5-K2O/ha for maize.

Results from the first year of this study showed that grain yields (7.4 t/ha and 11.6 t/ha for wheat and maize, respectively) and profits (US$2,138/ha and $3,640/ha for wheat and maize, respectively) in NE were higher than those in FFP treatments. The corresponding yield values were 7.1 and 11.0 t/ha and profits were $2,008/ha and $3,412/ha in FFP for wheat and maize, respectively. Also, higher agronomic efficiency of N (8.0 kg/kg for wheat and 8.6 kg/kg for maize), N recovery efficiency (13% for wheat and 26% for maize), and partial factor productivity of N (40 kg/kg for wheat and 66 kg/kg for maize) were obtained using NE-based fertilizer recommendations than using FFP, where the corresponding values were 7.9 and 5.4 kg/kg, 12 and 26%, and 36 kg/kg and 63 kg/kg for wheat and maize, respectively. The NE treatment did not always reduce fertilizer rate (slightly higher N rate for maize was used in this study in NE compared with FFP), but applied N, P and K fertilizers in greater balance than in FFP in this study. Henan-NMBF