| Correlation analysis between soil temperature variation in winter and spring and growth and yield of winter wheat in Tianshui |
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| DOI：10.7606/j.issn.1000-7601.2012.05.08 |
| Key Words: Tianshui region soil temperature winter wheat developmental stages growth and yield |
| Author Name | Affiliation | | WANG Chunling | College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, Jiangsu 210044, China
Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climatic Change and Reducing Disaster of China Meteorological Administration, Lanzhou, Gansu 730020, China | | SHEN Shuanghe | College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing, Jiangsu 210044, China | | WANG Runyuan | Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climatic Change and Reducing Disaster of China Meteorological Administration, Lanzhou, Gansu 730020, China | | ZHAO Hong | Institute of Arid Meteorology, China Meteorological Administration, Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Open Laboratory of Arid Climatic Change and Reducing Disaster of China Meteorological Administration, Lanzhou, Gansu 730020, China |
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| Abstract: |
| For researching impacts of soil temperature change on growth and yield of winter wheat, winter and spring soil temperature variation in recent 28 a, impacts of winter and spring soil temperature variation on the start and duration of winter wheat developmental stages after reviving green stage, as well as on winter wheat growth, product features and actual output were studied by using winter wheat observation data and winter and spring soil temperature data in 1982—2010 in Tianshui region. The results showed that: (1) winter and spring soil temperature have been warming in recent 28a, and the increase of spring soil temperature is larger than that of winter; (2) winter and spring soil temperature is negatively correlated with the start time of each growth stage of winter wheat after reviving green stage, and the duration of whole growth period is significantly negatively correlated with spring soil temperature; (3) the spring soil temperature is negatively correlated with the height of winter wheat in booting stage, but significantly positively correlated with seed-stem ratio and percentage of ear bearing tiller. There is an obvious relationship between the winter and spring soil temperature and the winter wheat growth and yield, and the impacts of soil temperature in spring are stronger than that in winter. The impacts of spring soil temperature are significant and persistent, while the impacts of winter soil temperature are stage wise and lag. |
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