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[Effect of different watering and fertilization on N utilization efficiency]
1Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100.
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|January 5, 2002
Summary
Optimizing nitrogen (N) and water (W) application timing and rates significantly boosts potato N utilization efficiency. Early timing is best for low rates, while later timing suits high rates.
Area of Science:
- Agricultural Science
- Agronomy
- Soil Science
Context:
- Greenhouse cultivation presents unique challenges for nutrient and water management.
- Optimizing nutrient and water inputs is crucial for crop productivity and resource efficiency.
Purpose:
- To investigate the impact of watering and fertilization timing (D), water amount (W), and nutrient application rates (N, K, M) on potato N utilization efficiency.
- To determine the optimal combination of these factors for maximizing nitrogen use efficiency under dry greenhouse conditions.
Summary:
- Nitrogen (N) utilization efficiency in potatoes was most influenced by N, followed by water amount (W), watering/fertilization timing (D), manure (M), and potassium (K).
- Optimal timing of watering and fertilization significantly enhanced N utilization efficiency across various application rates.
- The interaction between high water and nitrogen rates yielded the highest N utilization efficiency (57.83%). Conversely, imbalanced high/low rates of W and N resulted in the lowest efficiency (22.51-22.87%).
Impact:
- Provides data-driven recommendations for optimizing irrigation and fertilization strategies in greenhouse potato production.
- Highlights the critical role of timing and balanced application rates for efficient nitrogen use, reducing waste and environmental impact.
- Offers insights for improving crop yield and resource management in controlled agricultural environments.