Nutrient Management in Pecan Orchard Systems

Pecan trees demand balanced nutrient inputs to sustain growth, yield and kernel quality across diverse climates and soils. Central to management are macronutrients—nitrogen for vegetative vigour, phosphorus for root development and potassium for nut filling—and key micronutrients such as zinc and iron that support enzymatic and photosynthetic functions. Soil characteristics, notably texture, pH and organic matter content, govern nutrient availability and water retention, while interactions between mineral and organic fertilisers influence long-term soil health. Foliar applications can correct mid-season deficiencies and modulate carbohydrate reserves linked to alternate bearing. Integrating site-specific soil testing, judicious timing of fertiliser rates and supplemental organic amendments promotes sustainable production, mitigates environmental impacts and enhances resilience to stressors such as drought or pest pressure. Globally, from North America to emerging orchards in South America and Asia, refined nutrient strategies underpin commercial expansion and quality standards in pecan cultivation.

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Nutrient Management in Pecan Orchard Systems publication trend

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Technical terms

Alternate bearing: cyclical fluctuation between high-yield and low-yield years in perennial crops.

Foliar application: delivery of nutrients directly to leaves via spray to supplement root uptake.

Non-structural carbohydrates: soluble sugars and starch stored in tree tissues as energy reserves.

Macronutrients: essential elements (nitrogen, phosphorus, potassium) required in relatively large amounts for growth.

Micronutrients: trace elements (e.g. zinc, iron) needed in small quantities to support metabolic and enzymatic processes.

References

1. Non-Structural Carbohydrates, Foliar Nutrients, Yield Components and Oxidative Metabolism in Pecan Trees in Response to Foliar Applications of Growth Regulators. Agriculture (2022).
2. Análisis del Suelo y su Importancia en el Cultivo del Nogal Pecanero en el Distrito de Riego 05 Delicias. Revista Biológico Agropecuaria Tuxpan (2022).
3. Yield, quality, alternate bearing and long-term yield index in pecan, as a response to mineral and organic nutrition. Notulae Botanicae Horti Agrobotanici Cluj-Napoca (2020).