| In order to explore the climate change characteristics at different growth stages of drought-alkali-resistant wheat in Hebei and their impact on wheat yield, the meteorological observation data and yield data from the main production areas of drought-alkali-resistant wheat from 2009 to 2022 were collected, and various methods, including quartiles and climate slopes, were employed to analyze the climate characteristics and trends at different growth stages of drought-alkali-resistant wheat. Subsequently, the second-order curve method was used to separate meteorological yield, and the grey correlation degree method was applied for a dual quantitative analysis of the impact of meteorological factors on wheat yield during different growth stages. The results were as follows: (1) At each growth stage of drought-alkali-resistant wheat, there were clear distribution patterns for average temperature, maximum temperature, minimum temperature, and sunshine hours. Precipitation was the most variable meteorological factor in the growth and development process of drought-alkali-resistant wheat. (2) There were significant differences in the trends of various meteorological factors at different growth stages of drought-alkali-resistant wheat. (3) Monofactor quantification revealed that precipitation at sowing stage, tillering stage, overwintering stage and heading stage, sunshine hours at seeding stage and grain filling stage, average temperature at reviving, minimum temperature at jointing stage had the greatest impact on the meteorological yield of drought-alkali-resistant wheat. (4)Dual quantification indicated that the top five meteorological factors affecting the meteorological yield of drought-alkali-resistant wheat, ranked as precipitation at tillering stage, precipitation at overwintering stage, minimum temperature at tillering stage, minimum temperature at jointing stage, and precipitation at heading stage. Therefore, in order to promote wheat growth and high yield in drought-alkali-resistant wheat planting areas in Hebei, some field water management measures such as water conservation and irrigation should be used according to the precipitation change during wheat growth period, and the low temperature impact on wheat should attact more attention at tillering and jointing stages. |
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