TY - JOUR
T1 - Response of two field-grown maple (Acer) species to reduced irrigation in a high vapor pressure, semi-arid climate
AU - Montague, D. Thayne
AU - Bates, Amber
N1 - Publisher Copyright:
© 2015 International Society of Arboriculture.
PY - 2015/11
Y1 - 2015/11
N2 - Urban forests provide many benefits for those living and working in urban areas. However, urban trees face many challenges (e.g., poor soil, drought, high vapor pressure deficits). Therefore, finding tree species adapted to urban climates is essential to maintain a healthy urban forest. In a semi-arid climate, field-grown 'Autumn Blaze' (Acer × freemanii 'Autumn Blaze') and shantung (A. truncatum) maple trees were subjected to three reference evapotranspiration (ETo) based irrigation regimes (100%, 66%, and 33% ETo) over a three-year establishment period (2003-2005). During this time, weather data, tree water relations, gas exchange, and growth data were measured. Growing-season maximum air temperature was 40.1°C, and maximum vapor pressure deficit was 6.8 kPa. Pre-dawn leaf water potential was more negative for 'Autumn Blaze' trees, and trees receiving the least amount of irrigation. However, midday stomatal conductance was similar for trees receiving 100% and 66% ETo based irrigation regimes. In addition, stomatal conductance was greatest for 'Autumn Blaze' trees. Growth data were influenced by species and irrigation regime. However, despite differing irrigation volumes, greatest growth was not necessarily associated with trees receiving the greatest irrigation volume. Regardless of irrigation volume, these maple species maintained adequate growth and appearance when grown in an adverse, semiarid climate. Despite reduced irrigation, each species appears to be adapted to harsh climates associated with urban environments.
AB - Urban forests provide many benefits for those living and working in urban areas. However, urban trees face many challenges (e.g., poor soil, drought, high vapor pressure deficits). Therefore, finding tree species adapted to urban climates is essential to maintain a healthy urban forest. In a semi-arid climate, field-grown 'Autumn Blaze' (Acer × freemanii 'Autumn Blaze') and shantung (A. truncatum) maple trees were subjected to three reference evapotranspiration (ETo) based irrigation regimes (100%, 66%, and 33% ETo) over a three-year establishment period (2003-2005). During this time, weather data, tree water relations, gas exchange, and growth data were measured. Growing-season maximum air temperature was 40.1°C, and maximum vapor pressure deficit was 6.8 kPa. Pre-dawn leaf water potential was more negative for 'Autumn Blaze' trees, and trees receiving the least amount of irrigation. However, midday stomatal conductance was similar for trees receiving 100% and 66% ETo based irrigation regimes. In addition, stomatal conductance was greatest for 'Autumn Blaze' trees. Growth data were influenced by species and irrigation regime. However, despite differing irrigation volumes, greatest growth was not necessarily associated with trees receiving the greatest irrigation volume. Regardless of irrigation volume, these maple species maintained adequate growth and appearance when grown in an adverse, semiarid climate. Despite reduced irrigation, each species appears to be adapted to harsh climates associated with urban environments.
KW - A. truncatum
KW - Acer & times
KW - Freemanii Autumn blaze
KW - Gas exchange
KW - Plant factor
KW - Reference evaporation
KW - Shantung maple
KW - Urban forest
KW - Vapor pressure deficit
UR - http://www.scopus.com/inward/record.url?scp=84946571020&partnerID=8YFLogxK
M3 - Review article
AN - SCOPUS:84946571020
VL - 41
SP - 334
EP - 345
JO - Arboriculture and Urban Forestry
JF - Arboriculture and Urban Forestry
SN - 1935-5297
IS - 6
ER -