Water and nitrogen regulation strategy for wolfberry farmland based on nitrogen balance in the Yellow River irrigation districts of Gansu Province, China
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View abstract on PubMed
Summary
This summary is machine-generated.Optimizing wolfberry production requires balancing irrigation and nitrogen. Mild water deficit (W1) and medium nitrogen (N2) application maximized yield, while mild water deficit (W1) with low nitrogen (N1) enhanced nitrogen use efficiency.
Area Of Science
- Agricultural Science
- Agronomy
- Soil Science
Background
- Agricultural production faces challenges from soil nitrogen pollution and nutrient imbalances due to suboptimal irrigation and fertilization.
- Wolfberry (Lycium barbarum) cultivation is significant in arid and semi-arid regions, making efficient water and nitrogen management crucial.
Purpose Of The Study
- To investigate the impact of varying irrigation and nitrogen application rates on wolfberry nitrogen uptake, soil nitrogen dynamics, and nitrogen use efficiency.
- To determine the optimal combination of irrigation and nitrogen fertilization for sustainable and high-yield wolfberry production.
Main Methods
- Field experiment with four irrigation levels (W0-W3) and four nitrogen application rates (N0-N3) on wolfberry farmland.
- Monitoring of plant dry matter and fruit yield, plant nitrogen uptake, soil nitrate-nitrogen content, N2O emissions, and nitrogen use efficiency indicators.
Main Results
- Plant and fruit yields, along with nitrogen uptake, increased with higher irrigation and nitrogen levels, with the W1N2 treatment showing significant improvements.
- Soil nitrate-nitrogen content varied with depth and treatment, with W0N3 resulting in the highest residual soil nitrate and W3N0 the lowest.
- Soil N2O flux and total emissions increased with higher irrigation and nitrogen inputs, indicating potential environmental concerns.
Conclusions
- The W1N1 treatment demonstrated the highest nitrogen productivity, absorption efficiency, and recovery efficiency, suggesting optimal nitrogen utilization.
- A combination of 392.40 mm of irrigation and 150 kg·ha⁻¹ of nitrogen is recommended for efficient and sustainable wolfberry production in the studied region.
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