Water Use of Eucalyptus camaldulensis on Highly Saline and Non-Saline Soils in Yang Talad, Kalasin Province, Thailand

摘要

A heat-pulse-velocity technique was used to monitor water use by Eucalyptus camaldulensis trees from Petford, Queensland, Australia. The trees were planted on recharge (non-saline soil) and discharge (highly saline soil) areas for ecological studies in Yang Talad, Kalasin province, Thailand. Watertables were over at 7.6 m depth on non-saline and 1.5 m on highly saline soil areas during 1998. Water use was studied for 14 months to investigate and assess the technique to improve saline soils in northeastern Thailand. Water use was 12.25 L tree~(-1) day~(-1) or 2.17 mm day~(-1) on highly saline soil, on which trees had a mean diameter at breast height (dbh) of 9.37 cm and a sapwood area of 35.69 cm~2. Water use was 15.51 L tree~(-1) day~(-1) or 3.48 mm day~(-1) on non-saline soil for trees with 11.09.cm dbh and sapwood area 51.10 cm~2. Water use of E. camaldulensis was 800 and 1322 mm yr~(-1) on the highly saline soil and non-saline soil areas, respectively.