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Ultrasonic treatment and specific cultivation methods significantly boost super rice yield in South China by increasing intercepted photosynthetically active radiation (IPAR) and radiation use efficiency (RUE). These factors are key to improving rice production.

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Area of Science:

  • Agronomy and Crop Science
  • Plant Physiology
  • Agricultural Engineering

Background:

  • High yield in super rice is linked to increased intercepted photosynthetically active radiation (IPAR) and radiation use efficiency (RUE).
  • Optimizing cultivation techniques and applying treatments like ultrasonic application are crucial for enhancing rice productivity in South China.

Purpose of the Study:

  • To evaluate the impact of ultrasonic treatment and a super rice-specific cultivation technique on rice yield.
  • To determine the correlation between intercepted photosynthetically active radiation (IPAR), radiation use efficiency (RUE), and rice yield.
  • To analyze the contributions of IPAR and RUE to yield enhancement under different cultivation strategies.

Main Methods:

  • Field experiments were conducted over two years using two rice varieties (Wufengyou-615 and Jingnongsimiao).
  • Treatments included conventional cultivation (CK), ultrasonic treatment (T1), super rice-specific cultivation (T2), and both (T3).
  • Measurements included yield, panicle number, grain-filling rate, dry weight, IPAR, and RUE, analyzed using multiple-regression models.

Main Results:

  • Both the super rice-specific cultivation technique and ultrasonic treatment significantly increased rice yield (p < 0.01).
  • Yield increases were positively correlated with panicle number, grain-filling rate, and aboveground dry weight.
  • Higher grain yield was strongly associated with enhanced RUE during the mid-tillering and maturity stages; IPAR and RUE significantly contributed to yield.

Conclusions:

  • Super rice-specific cultivation techniques combined with ultrasonic treatment effectively enhance yield in South China.
  • Intercepted photosynthetically active radiation (IPAR) and radiation use efficiency (RUE) are critical drivers of yield improvement in super rice.
  • Further research is recommended to explore methods for improving RUE in high-RUE rice varieties.