| Impacts of climatic change on potato growth vulnerability at different elevation in the Loess Plateau of Gansu |
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| DOI：10.7606/j.issn.1000-7601.2013.02.11 |
| Key Words: Loess Plateau of Gansu climate changing potato growth vulnerability |
| Author Name | Affiliation | | YAO Yubi | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration,
Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou， Gansu 730020, China
Meteorological Bureau of Dingxi of Gansu Province，Dingxi, Gansu 743000, China | | WANG Runyuan | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration,
Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou， Gansu 730020, China | | ZHAO Hong | Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province, China Meteorological Administration,
Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou， Gansu 730020, China | | WANG Ruijun | Evaporation Experimental Station of Bayangaole, Hydrology and Water Resources Bureau of the Ningxia-Inner Mongolia
Reach, Yellow River Conservancy Committee, Dengkou, Inner Mongollia 015200, China |
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| Abstract: |
| Based on potato growth data and parallel observation meteorological data at different elevation in the Loess Plateau, the impacts of climate changing on potato growth and the characteristics of potato growth vulnerability variation had been analyzed. The results showed that precipitation turned to be a descending trend and the absolute value of fitting trend rate reached the
maximum in May to October. The phenomenon appeared more obvious at higher elevation area than that of lower elevation area. It also indicated that the temperature turned to be an increasing trend and value of fitting trend rate in higher elevation was under that in lower elevation. The aridity index increased obviously from year to year, especially in 1990s and climate turned to be hot-drying. The temperature is the main meteorological factors that influenced the potato growth. Because of climate changing, the vegetation growth period was shortened, the reproductive growth period was delayed and the whole growth period extended. The vulnerability of potato increased in tuber expands period when higher temperature met. The temperature sensibility of potatoes decreased and vulnerability decreased with the elevation lifting. The vulnerability of potato production forming increased in flowering period when the precipitation decreased. The drought disaster added the risk rate of potato
growing in that period. The vulnerability that caused by precipitation sensibility of potatoes and precipitation decreasing reduced with elevation lifting too. |
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