Age-related water use characteristics of Robinia pseudoacacia on the Loess Plateau
نویسندگان
چکیده
Understanding water use characteristics of revegetation species is crucial for evaluating plant adaptability and guiding the sustainability vegetation restoration in semiarid regions. Ecological projects have been implemented decades degraded ecosystems, achieving significant changes cover. However, main tree at different ages remain poorly understood such systems. We investigated Robinia pseudoacacia plantations stand-age (18 30 years). The most widely planted efforts on Loess Plateau. ?2H ?18O xylem soil within 500 cm surface ?13C values leaves were measured during two consecutive hydrological years. results showed that uptake proportions from across columns changed 18-yr R. between a drier (2016) wetter year (2017). In contrast, shallow was largely comparable stand 30-yr 2016 2017, similarly pattern by roots middle deep column comparable. leaf-level efficiency (WUEi) trees older plantation higher year, thereby partly alleviating low infiltration to precipitation ratio. These findings suggest distinct display responses variations precipitation. Older respond increased availability increasing WUEi instead switching sources. This means an essential factor be considered ecological management, which can enhance effectiveness strategies. study indicates useful input research management throughout continuity effort.
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ژورنال
عنوان ژورنال: Agricultural and Forest Meteorology
سال: 2021
ISSN: ['1873-2240', '0168-1923']
DOI: https://doi.org/10.1016/j.agrformet.2021.108344