Nutrient management and optimized fertilization on selected crops in Liaoning province

The project has been focusing on Nutrient Expert based fertilizer recommendation since 2011

IPNI-2006-CHN-LN6

25 Jan 2013

2012 Annual Interpretive Summary

Nutrient Expert®-based Fertilizer Recommendation for Spring Maize in Liaoning, 2012

This study was conducted to validate Nutrient Expert® (NE)-based fertilizer recommendations for spring maize in farmer fields and compare them with farmer fertilizer practice (FFP). Twenty on-farm experiments were conducted in three different counties in Liaoning province. NE-based fertilizer recommendation plots received, on average, 161-69-89 kg N-P2O5-K2O/ha, respectively, while FFP plots received an average of 237-76-44 kg N-P2O5-K2O/ha, respectively.

Results from the second year of this study showed that NE achieved more grain yield (11.5 t/ha) and profit (US$3,774/ha) than the FFP treatment (10.9 t/ha and $3,520/ha, respectively). Moreover, significantly higher agronomic efficiency of N (13 kg/kg) and partial factor productivity of N (72 kg/kg) were obtained using NE-based fertilizer recommendations than using FFP, where the corresponding values were 6.3 kg/kg and 46 kg/kg. The study demonstrated that NE was an effective fertilizer recommendation method in Liaoning. Liaoning-NMBF