Optimizing nitrogen fertilizer spraying timings to enhance nitrogen use efficiency in oil peony: Implications for intelligent Micro-sprinkler systems
The timing of nitrogen (N) fertilizer spraying is a critical consideration in the application of intelligent micro-irrigation systems. In this study, with the aid of Internet of Things technology, temperature and humidity sensors were used to measure the daily variations of canopy temperature and hu...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-08-01
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| Series: | Smart Agricultural Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772375525002217 |
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| Summary: | The timing of nitrogen (N) fertilizer spraying is a critical consideration in the application of intelligent micro-irrigation systems. In this study, with the aid of Internet of Things technology, temperature and humidity sensors were used to measure the daily variations of canopy temperature and humidity. Four N fertilizer spraying timings (T1, 3:00; T2, 7:00; T3, 14:00, T4, 19:00) were established to assess their impact on plant N use efficiency and the underlying mechanisms. The assessment was based on oil peony yields and its compositions, leaf and fruit N accumulation and partitioning, chlorophyll contents, N contents at different soil depths, and the correlations between these factors and the canopy temperature and humidity accumulation effects at different time intervals. The results showed that T3, applied during the peak temperature and lowest humidity period of the day, effectively mitigated the canopy temperature, increased the humidity, and enhanced the accumulation of N in leaves and fruits, as well as chlorophyll formation. These outcomes contributed to an increased number of fruits per plant and promoted oil peony yield formation. Moreover, the elevated leaf N accumulation in T3 facilitated the storage of substantial N in the soil as organic matter post-leaf fall, thereby improving N fertilizer use efficiency. This study provides a theoretical basis for the application of intelligent micro-irrigation in oil peony cultivation systems. |
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| ISSN: | 2772-3755 |