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Related Experiment Video

Updated: Sep 13, 2025

Repeatable Stair-step Assay to Access the Allelopathic Potential of Weedy Rice Oryza sativa ssp.

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Published on: January 28, 2020

High Stubble Height Enhances Ratoon Rice Yield by Optimizing Light-Temperature Resource Utilization and Photothermal

Yin Zhang¹, Tian Sheng¹, Liyan Shang¹

¹Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Agriculture, Yangtze University, Jingzhou 434025, China.

Plants (Basel, Switzerland)

|July 30, 2025

Summary

This summary is machine-generated.

High stubble significantly boosts ratoon rice yield by improving light and temperature resource use. This method enhances total dry weight and yield, offering a new way to optimize ratoon rice production.

Keywords:

grain yield light and temperature resources photothermal quotient ratoon rice stubble height

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Area of Science:

Agricultural Science
Agronomy
Plant Physiology

Background:

Ratoon rice is a sustainable agricultural practice.
Yield in ratoon rice is dependent on light and temperature use efficiency.
The photothermal quotient (PQ) is a key metric for light and temperature use efficiency, impacting ratoon rice yield.

Purpose of the Study:

To investigate the effects of different stubble heights on PQ and resource utilization in ratoon rice.
To analyze how stubble height influences radiation use efficiency (RUE), temperature use efficiency (TUE), and intercepted photosynthetically active radiation (IPAR).
To determine the relationship between PQ and ratoon rice yield under varying stubble heights.

Main Methods:

A two-year field experiment was conducted on six ratoon rice varieties.
Two stubble height treatments (high stubble - HS, low stubble - LS) were applied during the ratoon season.
Measurements included RUE, TUE, PQ, interception percentage (IP), IPAR, and total dry weight (TDW).

Main Results:

High stubble (HS) treatment significantly increased ratoon season yield by 21.2% (2022) and 28.1% (2023) compared to low stubble (LS).
HS treatment led to increased TDW, IP, IPAR, RUE, and TUE.
PQ was significantly lower under HS due to reduced light and heat accumulation duration, showing a negative correlation with ratoon season yield.

Conclusions:

High stubble management enhances ratoon rice yield by improving light and temperature resource utilization (IP, IPAR, RUE, TUE).
Despite lower PQ under HS, this treatment results in higher yields, indicating PQ's complex relationship with ratoon yield.
PQ can predict yield changes in the ratoon season under high stubble conditions, aiding in optimizing resource use for sustainable ratoon rice production.