The increasing challenges posed by climate change have significant implications for agricultural productivity, particularly for crops like Angelica sinensis, a valuable medicinal plant. Understanding how climatic variables such as temperature and precipitation affect the yield of Angelica sinensis is critical for developing adaptive strategies to sustain its cultivation. research to determine impacts climatic variables on yields of Angelica sinensis in Northwestern Cool Semi-Humid Region of China seventeen years of agricultural meteorological data from 2005 to 2021. Linear trend estimation, Mann-Kendall mutation test, correlation analysis, and path analysis methods have been utilized to examine the relationships among temperature, precipitation, and yields of Angelica sinensis during the different growth stages from transplanting to harvest. The temperature during the growth period presents a fluctuating increasing trend of 0.37°C decade-1 with a mutation in 2013 and a prominent decreasing trend of -2.89°C decade-1 since 2016. Precipitation increases by 41.6 mm decade-1, and a mutation from low to high precipitation occurred in 2018. Yield has a strongly significant positive correlation with precipitation (correlation coefficient = 0.581). Path analysis results show that the precipitation during Three-leaves-to-six-leaves growth stage has the strongest direct influence on the yields of Angelica sinensis (path coefficient = 0.550), while the precipitation during Seven-leaves-to-harvest stage has a considerable direct influence (path coefficient = 0.521) despite the negligible simple correlation. Annual yields of Angelica sinensis significantly increase by 44.9 g/m² decade-1. This study valuable insights into optimizing the irrigation schedule and selecting suitable cultivation sites for Angelica sinensis, particularly under changing climatic conditions.
Li et al. (Fri,) studied this question.