ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 37 Issue 5 > 2011,37(5):615-621. DOI:10.7519/j.issn.1000-0526.2011.05.014 Prev Next
Causes and Impact Assessment of Autumn and Winter Low Temperature and Drought from 2008 to 2009 in Suzhou
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Abstract:
In order to evaluate the causes and impacts of autumn and winter low temperature and drought from 2008 to 2009 in Suzhou, we have conducted a research by use of the similar regression analysis method and integration regression method, based on the disastrous meteorological data and field disaster survey data from 1953 to 2009, and in combination with the growth law of winter wheat. It is concluded that the main reasons for autumn and winter low temperature and drought from 2008 to 2009 can be attributed to scarce rainfall for long time, loss of moisture in wheat field and the low temperature below 10 ℃ suddenly without a prior cold stress. The drought and frost damages to wheat belong to respectively serious drought and class 2 freeze injury. It occurred twice in 57 years and the return period was 16.5 a as the disaster. Impacts of drought and low temperature on yield were by means of hindering tiller and spiking primordium differentiation.
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