Journal of Food, Agriculture and Environment
Vol 11,
Issue 2,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Water use characteristics of artificial poplar forest based on Granier’s thermal dissipation probe method
Author(s):
Shaoning Li 1,
Bo Chen 2*, Shaowei Lu 1, Qinghua Pan 1, Yuping Zhang 1, Xinbing Yang 2Recieved Date: 2013-02-04, Accepted Date: 2013-04-28
Abstract:Water use characteristics of an artificial Poplar forest were investigated by combining the stem sap flow of Populus × euramericana cv. ‘74/76’ measured by Granier’s thermal dissipation probe method and the environmental factor in forests measured by a HOBO automatic weather station. The results showed that the daily pattern of water use of the poplars exhibited a mainly unimodal curve with a mean value of 5.61 cm-3·cm-2h-1. The order of seasonal changes was summer (13.44 cm-3·cm-2h-1) > autumn (11.47 cm-3·cm-2h-1) > spring (6.8 cm-3·cm-2h-1) > winter. Each environmental factor and whole-tree water use represented a good cubic curve relation (R2>0.51). Solar radiation, air temperature, soil temperature, and wind speed had a positive correlation with whole-tree water use. Air humidity had a negative correlation with whole tree water use. The correlation between soil moisture content and sap flow was poor, with a correlation coefficient of only 0.642. The results indicated that air humidity, soil temperature, and solar radiation were the most important factors impacting the whole-tree water use of poplar. According to the seasonal patterns of the poplars’ water use, that in summer was greater. An appropriate irrigation amount during the leaf-flushing period, no irrigation during the transpiration peak period, and a lag period are recommended.
Keywords:Populus × euramericana cv. ‘74/76’,
thermal dissipation, stem sap flow, water useJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Environment
Pages: 1255-1261
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