Variation Characteristics of Spring Starting Dates from 1991 to 2013 in Shache of West Xinjiang and Its Influence on Flowering
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Abstract:
The variation characteristics of spring starting date and its influence on flowering in Shache of West Xinjiang are analyzed, by use the ground meteorological data from Shache Meteorological Service from 1990 to 2013 and the blooming period observation data of apricot, apple, peach, pear, elaeagnus angustifolia, Amygdalus Communis L from Shache Agricultural Meteorological Station from 1992 to 2013. It is found that the average spring starting date is 21 March, and there occurred an exceptional advance in 2000. The starting date of spring not only is significantly correlated with the average temperature in March and the temperatures of various dekads in March, but also is significantly correlated with the temperatures of the middle January, the late February and the whole year. Fruit trees bloom gradually from March to May. The flowering of apricot (Amygdalus Communis L) is the earliest, pear (peach, apple) the second and oleaster the latest. The interannual differences of flowering durations of apricot, pear, and elaeagnus angustifolia are relatively larger，but all in an increasing trend. The differences in the starting dates of starting flowering, blooming, and late flowing of fruit trees and the date of spring starting are nearly the same. It reveals that the correlation between flowering starting and spring starting dates is the best, and the apricot is the closest. The regression forecasting model of flowering starting dates of fruit trees (apricot, pear, elaeagnus angustifolia) is established by using the partial least square method. The model can well simulate and forecast the flowering starting dates of apricot, pear, and elaeagnus angustifolia through the historical fitting and tests from 2011 to 2013.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.