Abstract:

Tianshui City of Gansu Province has become a pear fruit production base in the dry and cold region of northern China, due to its location in the hinterland of the Loess Plateau in central Gansu, with abundant light and heat, and deep soil layers. Affected by global climate change, the harm of meteorological disasters in Tianshui has significantly increased. Due to the tall height, early flowering period and long growth cycle of pear trees, their growth, development, and yield are more susceptible to the impact of climate change. In order to understand the impact of climate change on the total yield of pear trees, using statistical methods, this study analyzed the main agrometeorological conditions influencing pear tree yield in Tianshui over the past 40 years. The study identified the significant agrometeorological factors affecting pear yields such as the precipitation in early autumn (the last ten days of September), average temperature in mid-spring (the first ten days of April), and sunshine hours in late spring (the first ten days and middle ten days of May). Additionally, the substantial increase in temperatures during autumn and winter, coupled with early spring arid conditions, exacerbated nutrient depletion in fruit trees and hindered the normal development of flower buds, thereby impacting pear tree yields. The study results provide a decision-making support for effective utilization of climate resources and development of industrial layouts in fruit tree production and management departments.

Key words: Gansu Tianshui, climate change, agro-meteorological conditions, pear trees, yield, impacts, global warming