Effects of Paddy Rain-Flood Storage on Rice Growth Physiological Indices and Nitrogen Leaching under Organic Planting in Erhai Lake Basin
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Summary
This summary is machine-generated.Implementing controlled irrigation and rain-flood storage in Erhai Lake Basin paddy fields enhances rice growth and yield. This water-saving irrigation method reduces nitrogen loss and agricultural non-point source pollution, improving water resource protection.
Area Of Science
- Agricultural Science
- Environmental Science
- Hydrology
Background
- Erhai Lake Basin faces significant challenges with water resource protection and agricultural non-point source pollution.
- Conventional flooding irrigation practices contribute to water waste and pollution runoff.
- There is a need for sustainable irrigation methods to mitigate these environmental issues.
Purpose Of The Study
- To evaluate the effectiveness of controlled irrigation and rain-flood storage techniques in improving rice cultivation.
- To assess the impact of these methods on rice growth, yield, and physiological indicators.
- To quantify the reduction in nitrogen leaching and tailwater discharge into Erhai Lake.
Main Methods
- A two-year field experiment was conducted in Gusheng Village, Erhai Lake Basin.
- Treatments included conventional flooding irrigation (CK), controlled irrigation (C), flooding irrigation with deep storage and controlled drainage (CKCD), and water-saving irrigation with deep storage and controlled drainage (CCD).
- Rice growth, physiological indices, and nitrogen leaching in surface water, soil water, and groundwater were monitored.
Main Results
- Controlled irrigation (C) increased rice yield by 4.8% and improved other growth indicators compared to conventional flooding irrigation (CK).
- Water-saving irrigation with deep storage and controlled drainage (CCD) further enhanced yield by 6.5% compared to CKCD, with a 19% yield increase in 2023 over 2022.
- Both C and CCD treatments significantly reduced nitrogen loss and irrigation water usage, with CCD effectively decreasing tailwater discharge into Erhai Lake.
Conclusions
- Paddy field rain-flood storage methodologies effectively promote rice growth and physiological indicators.
- These methods significantly improve water resource utilization efficiency and reduce agricultural non-point source pollution.
- The CCD approach is particularly effective in mitigating tailwater pollution and maximizing nutrient utilization in the Erhai Lake Basin.
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