.png){kind=icon}
.png){kind=icon}
Return
Optimizing Sowing Date and Variety Selection of Direct-Seeded Rice in High-Temperature and Summer Drought Regions Enhances Food Security and Farmers' Income
.png){kind=icon}
OA
AI
J
陆
B
C
W
Y
W
DOI：10.1002/fes3.70258.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Extreme meteorological events, particularly the summer heat-drought compound events, increasingly threaten global rice production. In Southwest China, the precise synchronization of direct-seeded rice phenology with favorable climatic windows is critical for yield and quality. However, the interactive effects of sowing date and variety selection on climate resilience and economic returns remain insufficiently quantified. This study evaluated 16 rice varieties across five sowing dates (S1–S5), with S1 commencing on April 25th and subsequent sowings spaced at 10-day intervals in a representative heat-drought region to optimize cultivation strategies. Results indicated that typical heat-drought events concentrated from mid-July to mid-August. Delaying the sowing date effectively reduced high-temperature exposure. Two-line indica hybrid rice (2LIHR) generally outperformed inbred indica rice (IIR) and three-line indica hybrid rice (3LIHR) in grain yield and quality. Specifically, the yield of 2LIHR was 2.17%–53.92% higher than that of IIR and 6.92%–18.42% higher than that of 3LIHR. This yield advantage was primarily attributable to its superior panicle number, spikelets per panicle, and grain filling rate. Furthermore, appropriate delayed sowing date can effectively improve rice quality, and 2LIHR exhibited significantly higher head rice yield and lower chalky grain percentage across all sowing dates. Comprehensive GGE biplot, cluster analysis, and PCA showed that Jingliangyou-534 (JLY534) as the most stable and high-yielding variety. Economic assessment revealed that optimized configurations significantly enhanced profitability; for instance, JLY534 at S3 increased net profit by 765.43% compared to the control. Conversely, the control suffered economic losses under S4. These findings demonstrate that the synergistic optimization of sowing dates and varieties significantly improves resource-use efficiency and climate resilience, thereby providing a robust technical framework for enhancing food security and farmers' income in drought-prone tropical and subtropical regions.
Keywords:
climate resilience
GGE biplot analysis
grain quality
Southwest China
yield
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
4.5
Papers:
755
Citations:
2.7K