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[Correlation between nitrogen fruiting efficiency and nitrogen utilization and remobilization in winter wheat at
Yuan Gang Zhu1,2, Jin Peng Chu1, Xiu Zhang1
1State Key Laboratory of Crop Biology/Key Laboratory of Crop Ecophysiology and Farming System, Ministry of Agriculture/College of Agronomy, Shandong Agricultural University, Tai'an 271018, Shandong, China.
Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|April 18, 2019
Summary
Delayed sowing dates in winter wheat (Triticum aestivum) improve nitrogen fruiting efficiency and nitrogen utilization efficiency. This strategy reduces nitrogen uptake while enhancing grain production, offering a sustainable approach to wheat farming.
Area of Science:
- Agricultural Science
- Plant Physiology
- Agronomy
Background:
- Optimizing nitrogen use efficiency (NUE) is crucial for sustainable agriculture and reducing environmental impact.
- Winter wheat productivity is influenced by nitrogen management and sowing dates.
- Understanding nitrogen remobilization and utilization is key to improving crop yield and nitrogen fertilizer efficiency.
Purpose of the Study:
- To investigate the relationship between nitrogen fruiting efficiency, nitrogen utilization, and nitrogen remobilization in winter wheat.
- To analyze the impact of different sowing dates on these nitrogen-related parameters.
- To provide a theoretical basis for optimizing nitrogen management in wheat production.
Main Methods:
- Field experiments were conducted over two growing seasons (2014-2016) with five different sowing dates for winter wheat.
- Measurements included grain yield, grain number per unit area, nitrogen accumulation in shoots and spikes, nitrogen uptake efficiency, nitrogen utilization efficiency, and nitrogen remobilization parameters.
- Statistical analysis was performed to determine correlations and significant differences among treatments.
Main Results:
- No significant differences in grain yield or grain number per unit area were observed across different sowing dates.
- Delayed sowing decreased nitrogen accumulation and nitrogen uptake efficiency but increased nitrogen utilization efficiency and nitrogen fruiting efficiency.
- Nitrogen fruiting efficiency showed positive correlations with nitrogen utilization efficiency and nitrogen remobilization efficiency.
- Delayed sowing improved the nitrogen nutrition index and pre-anthesis nitrogen remobilization efficiency.
Conclusions:
- Properly delayed sowing dates can reduce nitrogen uptake while enhancing nitrogen utilization and fruiting efficiency in winter wheat.
- Increased nitrogen remobilization efficiency positively influences nitrogen fruiting efficiency.
- This approach offers a theoretical foundation for reducing fertilizer input and improving nitrogen use efficiency in wheat production.
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