Optimization of Topdressing for Winter Wheat by Accurate Growth Monitoring and Improved Production Estimation
| dc.contributor.author | Ji, Jingchun | en |
| dc.contributor.author | Liu, Jianli | en |
| dc.contributor.author | Chen, Jingjing | en |
| dc.contributor.author | Niu, Yujie | en |
| dc.contributor.author | Xuan, Kefan | en |
| dc.contributor.author | Jiang, Yifei | en |
| dc.contributor.author | Jia, Renhao | en |
| dc.contributor.author | Wang, Can | en |
| dc.contributor.author | Li, Xiaopeng | en |
| dc.contributor.department | School of Plant and Environmental Sciences | en |
| dc.date.accessioned | 2021-06-24T14:53:47Z | en |
| dc.date.available | 2021-06-24T14:53:47Z | en |
| dc.date.issued | 2021-06-16 | en |
| dc.date.updated | 2021-06-24T14:11:23Z | en |
| dc.description.abstract | Topdressing accounts for approximately 40% of the total nitrogen (N) application of winter wheat on the Huang-Huai-Hai Plain in China. However, N use efficiency of topdressing is low due to the inadaptable topdressing method used by local farmers. To improve the N use efficiency of winter wheat, an optimization method for topdressing (T<sub>HP</sub>) is proposed that uses unmanned aerial vehicle (UAV)-based remote sensing to accurately acquire the growth status and an improved model for growth potential estimation and optimization of N fertilizer amount for topdressing (NFT). The method was validated and compared with three other methods by a field experiment: the conventional local farmer’s method (T<sub>LF</sub>), a nitrogen fertilization optimization algorithm (NFOA) proposed by Raun and Lukina (T<sub>RL</sub>) and a simplification introduced by Li and Zhang (T<sub>LZ</sub>). It shows that when insufficient basal fertilizer was provided, the proposed method provided as much NFT as the T<sub>LF</sub> method, i.e., 25.05% or 11.88% more than the T<sub>RL</sub> and T<sub>LZ</sub> methods and increased the yields by 4.62% or 2.27%, respectively; and when sufficient basal fertilizer was provided, the T<sub>HP</sub> method followed the T<sub>RL</sub> and T<sub>LZ</sub> methods to reduce NFT but maintained as much yield as the T<sub>LF</sub> method with a decrease of NFT by 4.20%. The results prove that T<sub>HP</sub> could enhance crop production under insufficient N preceding conditions by prescribing more fertilizer and increase nitrogen use efficiency (NUE) by lowering the fertilizer amount when enough basal fertilizer is provided. | en |
| dc.description.version | Published version | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Ji, J.; Liu, J.; Chen, J.; Niu, Y.; Xuan, K.; Jiang, Y.; Jia, R.; Wang, C.; Li, X. Optimization of Topdressing for Winter Wheat by Accurate Growth Monitoring and Improved Production Estimation. Remote Sens. 2021, 13, 2349. | en |
| dc.identifier.doi | https://doi.org/10.3390/rs13122349 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/103986 | en |
| dc.language.iso | en | en |
| dc.publisher | MDPI | en |
| dc.rights | Creative Commons Attribution 4.0 International | en |
| dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en |
| dc.subject | topdressing optimization | en |
| dc.subject | UAV-based remote sensing | en |
| dc.subject | growth potential | en |
| dc.subject | winter wheat | en |
| dc.subject | Huang-Huai-Hai Plain | en |
| dc.title | Optimization of Topdressing for Winter Wheat by Accurate Growth Monitoring and Improved Production Estimation | en |
| dc.title.serial | Remote Sensing | en |
| dc.type | Article - Refereed | en |
| dc.type.dcmitype | Text | en |
| dc.type.dcmitype | StillImage | en |