Optimizing Agronomic Management Practices for Enhanced Radiation Capture and Improved Radiation Use Efficiency in...

Area of Science:

• Agricultural Science
• Agronomy
• Plant Physiology

Background:

• Aboveground biomass accumulation in crops is primarily determined by intercepted photosynthetically active radiation (IPAR) and radiation use efficiency (RUE).
• Optimized agronomic management practices are crucial for maximizing crop yield potential by influencing IPAR and RUE.

Purpose of the Study:

• To evaluate the impact of different integrated agronomic management practices on wheat (Triticum aestivum L.) yield.
• To determine how optimized management strategies influence IPAR and RUE in wheat canopies.

Main Methods:

• Comparison of four management treatments: local traditional practice (LP), improved local traditional practice (ILP), high-yield agronomic management (HY), and improved high-yield agronomic management (IHY).
• Assessment of crop growth, yield, IPAR, RUE, leaf area index, and economic profitability over two wheat growing seasons.

Main Results:

• The IHY treatment resulted in grain yields 7-96% higher than ILP and LP, and comparable to HY.
• Both HY and IHY treatments increased total IPAR by maintaining high leaf area index and IPAR fraction.
• IHY demonstrated enhanced post-anthesis IPAR and RUE, contributing to higher aboveground biomass and net profit.

Conclusions:

• Optimized agronomic management, particularly the IHY strategy, effectively enhances radiation capture and utilization in wheat.
• The IHY approach is recommended for its high grain yield, improved RUE, and significant economic benefits in the target region.
• Further research is needed to optimize pre-anthesis RUE within advanced management systems.