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Interpretive Summaries:
2012 - Nutrient Expert®-based Fertilizer Recommendations for Winter Wheat and Summer Maize in Henan
2011 - Nutrient Expert-based Fertilizer Recommendation for Winter Wheat and Spring Maize in Henan
2010 - Nutrient Expert-Based Fertilizer Recommendation for Summer Maize in Henan
2009 - Nutrient Management and Balanced Fertilization on Wheat and Maize in Henan
2008 - Nutrient Management and Balanced Fertilization on Wheat and Maize in Henan
2007 - Soil Nutrient Management and Balanced Fertilization in Henan
2006 - Nutrient Management and Balanced Fertilization on Selected Crops in Henan
Nutrient Expert-Based Fertilizer Recommendation for Summer Maize in Henan, 2010
Imbalanced nutrient application and excessive use of N have presented a great challenge to North-central China in recent years. These practices have resulted in losses of yield and profits for farmers, and caused detrimental environmental effects. A fertilizer recommendation based on Nutrient Expert (NE) was developed based on crop responses to nutrient applied and the maintenance of soil nutrients to obtain both high yield and environmental protection. On-farm experiments with summer maize at 50 farmer fields in Yanjin, Henan, tested the hypothesis that maize yields, profit, nutrient uptake, and fertilizer efficiency can be improved through a NE-based fertilizer recommendation. In this study, we evaluated the performance of NE management using 145-51-61 kg N-P2O5-K2O/ha compared to the prevailing, and imbalanced, farmer practice (FP) of applying 251-4-5 kg N-P2O5-K2O/ha.
On average. NE plots obtained 8.3 t/ha grain yield and generated a net profit over fertilizer cost of USD 2,109/ha, which was not significantly different than the 8.2 t/ha and USD 2,090/ha achieved with FP. Despite this, NE management achieved significantly higher N use efficiency parameters such as N recovery efficiency (45%), partial productivity of N (57 kg/kg), and agronomic efficiency of N (21.3 kg/kg) than those with FP (i.e., 21%, 32.5 kg/kg, and 11.9 kg/kg). The NE recommendation also used 42% less N compared to FP.
The Nutrient Expert-based fertilizer recommendation not only maintained high grain yields, but also improved N use efficiency, which is especially beneficial to the environment. Henan-NMBF
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