| 摘要: |
| 【目的 】 冠层温度是作物响应水分胁迫的重要指标，厘清小麦种植过程中冠层温度与土壤水分、周围环境因子之间的相互作用关系，对干旱监测、精准灌溉、智慧农业的发展有重要意义。 【方法 】 文章采用温室试验，通过自动连续观测土壤含水量、作物冠层温度、环境因子，分析小麦拔节期在不同水分处理下冠层温度和土壤含水量的关系。 【结果 】 （1）小麦拔节期日变化趋势与太阳辐射日变化基本一致。探索小麦拔节期冠层温度与土壤含水量相关性时，最佳观测时间为12：00—14：00；（2）冠气温差是判定小麦缺水的最佳指标，小麦冠气温差和土壤含水量线性拟合R=-0.63，表明冠层温度与土壤含水量呈负相关关系；（3）小麦拔节期冠层温度与环境因子密切相关，冠层温度与空气温度、太阳辐射存在显著正相关关系，与空气相对湿度和气压为负相关关系。 【结论 】 通过监测小麦冠层温度、环境因子等指标，可以实时了解小麦实际生长状况，为实现小麦精准灌溉管理提供数据支持。 |
| 关键词: 冠层温度 土壤水分 温室试验 小麦 拔节期 |
| DOI：10.12105/j.issn.1672-0423.20210202 |
| 分类号: |
| 基金项目:国家自然科学基金项目“耦合遥感与作物生长模型的农业干旱预警研究”（41871282）；农业农村部规划设计研究院自主研发项目“‘3S’技术支持下的自主可控精准农业体系研究”（ZZYFXKFZ201904） |
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| Study on the relationship between winter wheat canopy temperature and soil moisture under different irrigation gradients |
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Di Yan1, Gao Maofang1, Li Qiang1, You Jiong2
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1.Institute of Agricultural Resources and Regional Planning，Chinese Academy of Agricultural Sciences，Beijing 100081，China;2.Academy of Agricultural Planning and Engineering，Ministry of Agriculture and Rural Affairs，Beijing 100125，China
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| Abstract: |
| ［ Purpose ］ Canopy temperature is an important indicator of crop response to water stress. Studying on the interaction between canopy temperature，soil moisture and surrounding environmental factors during wheat jointing stage is of great significance for drought monitoring，precision irrigation and smart agriculture development. ［Method ］ The greenhouse experiment was carried out to analyze the relationship between canopy temperature and soil water content at wheat jointing stage under different water treatments. Automatically and continuously observing soil water content，crop canopy temperature and environmental instruments were used to collect data. ［Result ］ The results showed that：（1）Wheat daily variation trend at jointing stage was basically consistent with the solar radiation. The best observation period was 12：00-14：00 p. m；（2）Canopy-air temperature difference of wheat was the best indicator of water shortage，and the linear fitting R between wheat canopy-air temperature difference and soil water content was -0.63. The results showed that there was a negative correlation between canopy temperature and soil water content；（3）Canopy temperature at wheat jointing stage is closely related to environmental factors. Canopy temperature is significantly positively correlated with air temperature and solar radiation，and negatively correlated with air relative humidity and air pressure. ［Conclusion ］ Monitoring wheat canopy temperature，environmental factors and other indicators，can we understand the actual growth status of wheat at jointing stage in real time，and provide data support for to realize precision irrigation management of wheat. |
| Key words: canopy temperature soil moisture greenhouse experiment wheat jointing stage |
