| Study on the influence of climate change to winter wheat ecological characteristic in the east of Gansu |
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| DOI：10.7606/j.issn.1000-7601.2007.04.15 |
| Key Words: climate warming winter wheat growth period |
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| Abstract: |
| This paper analyzed the warming of Dongzhi Yuan, an incomplete Yuan as a typical representative of loess plateau, and the ecological response characteristics of winter wheat to such a change. The results showed that Dongzhi Yuan's mean warming linear trend up to 0.0507℃ during the past 35 years, with all the indexes increasing, such as the mean temperature, the maximum temperature and the minimum temperature. The most remarkable temperature increasing occurred in winter and spring, then in autumn, while that in summer was the least. The warming's influence to the ecological characteristics of winter wheat was mainly showed by the shortening of the whole growth period and the advancing of most of the growth stages, while the interval has not presented the trend of shortening during spring. It is concluded that the warming of Dongzhi Yuan can cause certain adverse effects, such as the increase of winter wheat freezing injury probability in spring and the fading of existing variety adaptability, the apt condition for diseases and insect pests to live through the winter, the increase of soil moisture loss in winter etc, while it also has some positive effects like the shortening of the whole growth period, the earlier mature and the increase of land use efficiency. |
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