| Climatic change during Apr. to Oct. in recent 47 years and its effects on growing period of cotton in Beijiang cotton planting region |
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| DOI：10.7606/j.issn.1000-7601.2011.02.43 |
| Key Words: cotton growing period climatic variation characteristics the first and last date of frost accumulated temperature |
| Author Name | Affiliation | | LI Yingchun | Xinjiang Climate Center, Urumqi, Xinjiang 830002, China | | XIE Guohui | Xinjiang Meteorological Bureau, Urumqi, Xinjiang 830011, China | | WANG Runyuan | Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Key Open Laboratory of Arid Climate
Change and Discaster Reduction of CMA,Institute of Arid Meteorology,CMA, Lanzhou, Gansu 730020,China | | WANG Heling | Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province,Key Open Laboratory of Arid Climate
Change and Discaster Reduction of CMA,Institute of Arid Meteorology,CMA, Lanzhou, Gansu 730020,China |
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| Abstract: |
| The data of four weather stations during Apr. to Oct. from 1961 to 2007 in Beijiang cotton planting re-gion were analyzed using the climatic tendency coefficient ，and the characteristics of climate change during cotton growth
were also analyzed. The results were as follows:the temperature and the precipitation had been increasing, but the duration of sunshine decreasing. The date of the latest frost appearing was getting earlier and the date of the first frost was postponed. The 10C beginning date was getting earlier and the 10℃
ending date was postponed. The duration and accu-
mulated temperature(≥10℃)all were increasing. Contrasted with the data of cotton growing date since 1991, each grow-
ing stage from seeding to split boll period of cotton became earlier and the growing period was delayed ，and the whole growing season of cotton was delayed too. Wamner climate is advantageous to the cotton production in Beijiang cotton planting region. |
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