Claim · model-written summary
Thousand-seed weight followed the same decreasing trend as yield with delayed sowing.
Verbatim
e0“Direct seeding of winter rapeseed in the Yangtze River Basin”
e6“Yield decreased with delay”
e1“Thousand-seed weight followed the same trend”
Title
Effect of Sowing Date and Low-Temperature Seed Germination on Rapeseed Yield
Jifeng Zhu; Lei Lei; Xianmin Meng; et al. Agronomy 2025. doi:10.3390/agronomy15112545
Other claims from this paper (15)
- Intervention effect Mean germination rate was lower at low temperature (12/6 °C) than in the control (88.0% vs 97.6%).
- Intervention effect Germination potential was lower at low temperature (41.9%) than in the control (95.7%).
- Intervention effect Root and shoot length decreased at low temperature (1.47 and 0.48 cm) from the control values (7.63 and 5.02 cm).
- Association Overwintering survival declined with later sowing.
- Association In the colder season, survival for sowings after November fell below 20% for most accessions.
- Association Survival of S1–S2 sowings averaged above 80% in the colder season.
- Association Yield decreased with delayed sowing.
- Intervention effect In 2021–2022, yield under S1 exceeded S2–S6 by 5.5% to 23.3%.
- Intervention effect In 2020–2021, S1 yield was similar to S2.
- Intervention effect In 2020–2021, S1 yield was 6.3–22.8% higher than S3–S6.
- Association LT germination traits (LT GP and LT root length) were positively correlated with yield at several sowing dates in the colder season.
- Observation Seven accessions showed superior LT germination and comparatively better field performance.
- Recommendation A practical latest safe sowing window for the lower Yangtze site is late October.
- Association November sowing increases winter mortality and yield risk.
- Recommendation Selecting genotypes with strong LT germination and rapid autumn establishment can stabilize 1000-seed weight and yield when sowing is delayed.