The study analyzed how Hippophae rhamnoides L. plants in a loess hilly region transpire water and what factors influence this process. The researchers found that transpiration intensity changes throughout the day and season, with the highest average in May to September. Environmental factors like temperature, humidity, and sunlight affect transpiration, with sunlight having the biggest impact. Transpiration is also linked to stomatal conductance – when conductance increases, transpiration increases. This information can help understand how these plants respond to their environment, improve water ecology conditions, and increase forest survival in dry conditions.