Woody Plants Phonological Variation Characteristics and Its Responses to Climate Change During 1986-2010 in Bachu County
We have collected climatic data and monitoring data about plant phenology from 1986 to 2010 for Bachu county to analyze changing characteristic of temperature, precipitation and sunshine durations, and discuss the effect on phenology of Populus bolleanalanche, Salix babylonica, Prunus armeniaca, Fdeagnys Qxycarpasehlecht, Malus pumila, Pyrus bretschneideri, by calculating climate trend coefficient and climate tendency ratio. the research indicated that the temperature increased obviously, the warming rate was 0.18~0.95 ℃/10 a, The warming trend in spring and autumn was more obvious than that in winter and summer. The annual precipitation showed a decrease trend in recent 25 years, and decreased by -0.61 mm/10 a, with the downward trend in precipitation in spring and summer while the upward trend in winter and autumn. The annual sunshine hours in Bachu in recent 25 years presented a decrease trend, and the climate tendency rate was -30.34 h/10 a. Except in spring, the sunshine hours all presented a decrease trend at different degrees in other seasons. The most significant decrease amplitude (-27.09 h/10 a) occurred in winter. The increasing trend of precipitation was more obvious and the precipitation increased at the rate of 12.14 mm/10 a , The trend of climate change in Bachu county was becoming warmer and the trend was an clearly increase in precipitation. The decade, annual and seasonal sunshine durations in Bachu County had an increase trend since recent 25 years; seasonally, the incremental sunshine duration was the most in spring; the main climate factor affecting plant phenology was the temperature and sunshine durations. With the temperature rising and an increase in the time of sunshine durations, plant’s growing period extended. The arbor’s phenology in spring had correlativity with the temperature and sunshine durations in spring and notable correlativity in winter. There was a positive correlation between the phenological stages and autumn temperature, the phenological stages postponed inautumn.
国家科技期刊平台
NSTL
万方数据
维普
