|
|
|
Interpretive Summaries:
2012 - Nutrient Expert®-based Fertilizer Recommendations for Spring Maize in Heilongjiang
2011 - Nutrient Expert-based Fertilizer Recommendation for Spring Maize in Heilongjiang
2010 - Nutrient management for Maize in Heilongjiang Province
2009 - Nutrient Limiting Factors for Maize, Soybean, and Rice Production in Heilongjiang
2008 - Soil Nutrient Management and Balanced Fertilization in Heilongjiang
2007 - Soil Nutrient Management and Balanced Fertilization in Heilongjiang
2006 - Soil Nutrient Management and Balanced Fertilization for Selected Crops in Heilongjiang
Nutrient Expert-based Fertilizer Recommendation for Spring Maize in Heilongjiang, 2011
Nutrient Expert (NE) is a new, computer-based decision support tool developed to assist local experts to formulate fertilizer guidelines for maize (corn) in real-time, and is based on the principles of site-specific nutrient management (SSNM). This tool comes in handy, especially when soil testing facilities are not easily accessible, which makes timely fertilizer recommendations difficult. This study was conducted to validate NE-based fertilizer recommendations for spring maize in farmer fields and compare them with farmer fertilizer practice (FFP). For this, twenty six (26) on-farm experiments were conducted in four different counties in Heilongjiang province. NE-based fertilizer recommendation plots received 156 kg N, 57 kg P2O5, and 75 kg K2O/ha, on average, while farmer fertilizer practice (FFP) plots received an average of 185 kg N, 66 kg P2O5, 51 kg K2O.
Grain yield (8.4 t/ha) and profit (USD 1,735/ha) were higher in NE-based treatments than in the FFP, where corresponding values were 8.2 t/ha and USD 1,667/ha. Also, higher agronomic (14.5 kg/kg) and recovery (32.3%) efficiencies of N were obtained using NE-based fertilizer recommendations than using FFP, where corresponding values were 11.2 kg/kg and 26.6%. The NE-based treatment used 15.7% less fertilizer N than that used in the FFP. Thus, the first year results of this study showed a good promise for NE-based fertilizer recommendations to extend to farmers. Heilongjiang-NMBF
|
|
