RESUMO
Objective: To explore the ecological adaptability of Angelic sinensis in altitude of 2300-2800 m in Chabu countryside, Min County, Gansu province. Methods: Using the field experiment and correlation analysis, the effect of altitude on the yield formation was explored, and the key factors affecting yield were investgated. Results: The yield of A. sinensis increased with the elevation rising, the yields in the mid-and high-altitudes were higher than that of low-altitude by 30.3% and 22.0%, with significant difference (P < 0.05); The correlation analysis showed that temperature (R2 = -0.7453) and rainfall (R2 = 0.7417) were the key ecological factors, the malonaldehyde (MDA, R2 = -0.9118) and soluble sugar (SS, R2 = -0.8831) were the key physiological and biochemical factors, and the intercellular CO2 (Ci, R2 = -0.7393) and photosynthetic rate (Pn, R2 = -0.7332) were the key photosynthetic characteristic factors influencing the yield of A. sinensis. Conclusion: That is the benefit of the yield formation of A. sinensis by rising altitudes, reducing environmental temperature, increasing rainfall and photosynthetically active radiation, and reducing the contents of MDA, SS, and Ci.