Sensitive Spectral and Temporal–Spatial Characteristic Analysis of Leaf SPAD in Maize Under Variety and Nitrogen Coupling Effects
Fu Zhang, Baoping Yan, Le Yang, Fangyuan Zhang, Yakun Zhang, Yafei Wang, Shaukat Ali, Sanling Fu · 2026
Read Sensitive Spectral and Temporal–Spatial Characteristic Analysis of Leaf SPAD in Maize Under Variety and Nitrogen Coupling Effects by Fu Zhang, Baoping Yan, Le Yang, Fangyuan Zhang, Yakun Zhang, Yafei Wang, Shaukat Ali, Sanling Fu (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13240251.txt.
Description
Fu Zhang and seven co-authors study how to read the green health of maize leaves from reflected light. Their study was published in twenty twenty-six. The measure, SPAD, tracks chlorophyll and helps judge growth and yield, but the best leaf and stage to read were unclear.
The team followed SPAD across leaf positions and growth stages for several maize varieties under different nitrogen feeding. Two stages proved most sensitive: the twelve-leaf stage and the silking stage. Certain light indices read the ear leaves best at silking. A random forest model using many indices gave the best forecasts at the twelve-leaf stage. The work tells growers and breeders where and when to measure for the truest read on crop nitrogen.
Catalog record
| CREATOR | Fu Zhang, Baoping Yan, Le Yang, Fangyuan Zhang, Yakun Zhang, Yafei Wang, Shaukat Ali, Sanling Fu |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 55 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |