Fertilizer application parameters for drip-irrigated peanut based on the fertilizer effect function established from...

Area of Science:

• Agricultural Science
• Agronomy
• Soil Science

Background:

• Scientific fertilization is crucial for high and stable peanut yields.
• Optimizing nutrient application is key for sustainable agriculture and resource management.

Purpose of the Study:

• To establish an optimal fertilizer application system for peanuts under mulched drip irrigation (MDI).
• To determine the ideal fertilizer ratios and rates for maximizing peanut yield and economic benefits.

Main Methods:

• Utilized the "3414" optimal regression design with 14 treatments for nitrogen (N), phosphorus (P), and potassium (K).
• Conducted three-season field experiments to establish ternary quadratic fertilizer effect functions.
• Performed regression analysis and significance testing on fertilizer-yield relationships.

Main Results:

• Developed a ternary quadratic equation (R² = 0.9709) predicting peanut yield based on N, P, and K application rates.
• Identified optimal fertilizer application rates: 256.6 kg N/ha, 164.2 kg P₂O₅/ha, and 213.2 kg K₂O/ha.
• Recommended fertilization ratios of 1:0.64:0.83 (N:P₂O₅:K₂O) for maximum yield and economic benefit.

Conclusions:

• Established a data-based decision support system for precise peanut fertilization under MDI in Xinjiang.
• The system aids farmers in making scientific fertilization decisions, enhancing crop yields and minimizing environmental impact.
• Further multi-year and multi-site experiments are recommended to validate adaptability across diverse conditions.