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. 2025 Feb 3;16:1537378. doi: 10.3389/fpls.2025.1537378

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Copyright © 2025 Ning, Su, Shi, Ji, Ouyang, Song, Shao, Zhu and Chang

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Leaf morphology of canopy upper three leaves of early-season rice under different nitrogen applications. (A, B) leaf area, (C, D) leaf length, (E, F) leaf width. Different letters show significant differences between nitrogen applications at 5% probability level. Tillering stage data was measured on May 22^nd, panicle initiation stage date was measured on June 4^th. 6 replications were measured for each treatment.