Abstract:
According to climate data nearly 55 years and phenological actual observation data nearly 10 years of Luochuan, the climate change and its influence on apple phenophase were analyzed. The results show: there is markedly correlation between temperature change and apple phenophase. The temperature showed a significantly linear increase nearly 55 years in Luochuan, especially in spring, air temperature warmed up fast. The bud blooming period, flowering and young fruit appear period presented in advance obviously in the spring with increasing temperature. The phenophase manifests forward about 5 days with increasing 1.2 ℃ and forward about 10 days with increasing 2.5 ℃. Since in April, the temperature rose up faster than that in March, the length of time between the initial flowering and the final flowering stage showed a shrinking tendency. The shortened of flowering time led to declining in the number of young fruit. In autumn, fruit maturity stage is obviously influenced by the temperature of July and August. The temperature changed little in July and August in Luochuan during nearly 55 years, therefore, the fruit mature period in autumn is not obvious in advance. Young fruit appear early and fruit mature late, which is favorable to stock organic quality, and helpful to improve apple quality.
