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
IPNI-2006-CHN-HA16
19 Jan 2012
2011 Annual Interpretive Summary
Nutrient Expert-based Fertilizer Recommendation for Winter Wheat and Spring Maize in Henan, 2011
This study was conducted to validate Nutrient Expert (NE)-based fertilizer recommendations for winter wheat and spring maize in farmer fields and compare them with farmer fertilizer practice (FFP). For this, thirty (30) on-farm experiments were conducted for wheat and 12 for maize in Zhumadian, Henan province. NE-based fertilizer recommendation plots received on average 154-78-79 kg N-P2O5-K2O/ha for wheat and 150-50-62 kg N-P2O5-K2O/ha for maize, respectively, while farmer fertilizer practice (FFP) plots received an average of 249-119-119 kg N-P2O5-K2O/ha for wheat and 206-15-15 kg N-P2O5-K2O/ha for maize, respectively.First year results of the study showed that grain yields and profits in NE were both higher than those in FFP treatments. However, significantly higher agronomic efficiency of N (16.6 kg/kg for wheat and 18.4 kg/kg for maize), N recovery efficiency (52.9% for wheat and 43.0% for maize), and partial factor productivity (52.0 kg/kg for wheat and 53.0 kg/kg for maize) were obtained using NE-based fertilizer recommendations than using FFP, where the corresponding FFP values were 9.7 kg/kg and 12.7 kg/kg, 18.6% and 25.2%, and 31.5 kg/kg and 38 kg/kg for wheat and maize, respectively. With NE, 38.2% and 25.2% less fertilizer N was used than that used in FFP for wheat and maize, respectively. The study demonstrated that NE was an effective fertilizer recommendation method in Henan. Henan-NMBF