| Climatic condition and change dynamic of development level of the potential productivity of winter wheat in Tianshui |
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| DOI：10.7606/j.issn.1000-7601.2009.03.49 |
| Key Words: winter wheat climatic condition potential productivity development level change |
| Author Name | Affiliation | | HU Liping | Institute of Arid Meteorology Open Key Laboratory of Arid Climatic Changing and Reducing Disaster China Meteorological Administration Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020, China；Agrometeorological Experiment Station of Tianshui, Tianshui, Gansu 741020, China | | ZHANG Hualan | Agrometeorological Experiment Station of Tianshui, Tianshui, Gansu 741020, China | | WANG Runyuan | Institute of Arid Meteorology Open Key Laboratory of Arid Climatic Changing and Reducing Disaster China Meteorological Administration Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020, China | | CHEN Jun | ianshui Meteorological Bureau, Tianshui, Gansu 741018, China | | AN Jing | ianshui Meteorological Bureau, Tianshui, Gansu 741018, China |
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| Abstract: |
| The natural conditions like sunshine, temperature and precipitation were analyzed in the north of Wei River, the valley of Wei River and the area of Guan Mountain in Tianshui, Gansu Province, based on actual, experimental and statistical data of winter wheat output in three different areas in Tianshui, and the development level of potential productivity and the moderate development were calculated and their annual changes were analyzed.The results show that annual average temperature began dramatic warming in the early 1990's in three different areas of Tianshui, after warming the mean value of temperature in 1991～2006 is 0.8℃～0.9℃ higher than that in 1969～1990;the precipitation reduction mainly occurs in the 1990s, and, the north of Wei River reduction breadth is big;the level of moderate development is high, sequencing as the north of Wei River > the valley of Wei River > the area of Guan Mountain, still having great potential for long-term development, especially in the north of Wei River and the valley of Wei River;the annual change of the development degree of potential productivity and the moderate development degree and possible development degree has obvious difference in each region, its annual of anomaly change breadth is fluctuated in-10%～10%, -15%～15% and-3%～3%;changes of climatic conditions are very clear to the annual change of the development level of potential productivity and the moderate development, the main factor limiting moderate development of potential of winter wheat was the deficiency of precipitation.Countermeasures are put forward for moderate development of potential productivity in different areas of Tianshui. |
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