Water Storage and Use by Platycladus orientalis under Different Rainfall Conditions in the Rocky Mountainous Area of Northern China
نویسندگان
چکیده
Tree water transport and utilization are essential for maintaining ecosystem stability in seasonally arid areas. However, it is not clear how Platycladus orientalis absorbs, consumes via transpiration, stores under varying precipitation conditions. Therefore, this study used stem sap flow thermal dissipation probes hydrogen oxygen isotope tracing technology to observe different control treatments a P. plantation. We found that the average daily of had following order: no rainfall (NR) < half (HR) double (DR) natural (AR). The percentage nocturnal was as follows: AR (13.34%) NR (19.62%) DR (20.84%) HR (30.90%). storage (4.13%) (4.49%) (6.75%) (9.29%). primarily affected by vapor pressure deficit solar radiation, with degree influence AR. response environmental factors differed due soil changes relative extractable (REW) before after precipitation. During high REW conditions, have higher impact on flow. source absorbed changed regularly gradient. When content increased, gradually shallow soil. Compared precipitation, there significant change except NR. could adjust activities transpiration consumption, storage, absorption. This adaptive property conducive survival through extreme drought stress.
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ژورنال
عنوان ژورنال: Forests
سال: 2022
ISSN: ['1999-4907']
DOI: https://doi.org/10.3390/f13111761